First came our CLX 64. Then the 32s. And after racking up multiple wins in Grand Tours, Worlds, and everything in between, we knew that our best bet was to take the line to new heights, or well, new depths. We needed to design one wheel that was a true quiver killer. One wheel that had all the aerodynamic benefits of the 64 in a package that climbed like the 32, and that’s where the all-new CLX 50 comes in. When we set out to create the CLX 50 Disc, we had clear goals in mind—create wheels that are 48 to 54mm deep, aerodynamically optimized, ultra-wide, and under 1400 grams. This meant that they'd have to borrow some weight savings techniques that we developed for the CLX 32, take some aero guidance from the CLX 64, and keep all of the disc brake benefits that we've come to love if we were going to create what we like to call “the unicorn wheel." Why discs you ask? With our disc-specific rims, we ditch the brake track making for a stronger, more impact-resistant rim. This way, you get a disc-specific carbon layup that optimizes stiffness, a weight as close to its rim-brake brethren as possible, and incredible brake modulation and power in all conditions. Even though the CLX 50 is similar in weight to many wheels in the “lightweight” category, aerodynamics came at the forefront of the development. With this, we jumped headlong into Computational Fluid Dynamics computer modeling to arrive at various rim shapes that could make the CLX 50 as fast and light as possible. It took a while, but we narrowed the rim shape down to three contenders that were then CNC-machined into rims, built into wheels, and put into the Win Tunnel. In the tunnel, we tested every wheel, ours and the competition's, with a 24C tire (measuring 26C), as tires can drastically affect testing. We chose a modern-width tire to design our rims around because they not only allow for less tire pressure (which results in more comfort and less rolling resistance) but are also just as aerodynamically efficient when paired with the correct rim width. After finding the optimized rim shape that best supported our svelte weight requirements, we opted to lace the rims to our Aero Flange (AF) hub, via 24 DT Swiss Aerolite spokes, which features the legendary CeramicSpeed bearings. This way you get a complete, superior wheel system—not just a quick rim. And at the end of the day, it all amounts to a 50mm-deep, 770-gram rear wheel that's not only significantly lighter than the competition’s similar depth wheel, but is also measurably faster in every conceivable test than each wheel in its category.
Dual-sensing Pedal-based Power Meter Ride stronger, smarter, connected with the Vector 3 pedal-based power meter. As you strive to beat your personal best on your next race or Gran Fondo, power is the most reliable way to gauge your performance on any given day, at any given time. Unlike other power meters, Vector 3 has the sensors housed right in the pedals, so it delivers reliable, accurate data on every training session. - Installs like any other pedal and quickly transfers between bikes - Measures total power, left/right balance, cadence and cycling dynamics - Sleek design provides greater cornering clearance and improved stack height - Fully integrates with Garmin cycling ecosystem for data analysis - Allows for easy updates via compatible Edge cycling computers, ANT+ connectivity or Bluetooth-enabled fitness devices and Garmin Connect Mobile app - Battery life: up to 120 hours - Cleat hardware included WARNING: The maximum weight limit of the cyclist using the Vector system is 231 lbs (105 kg). Cyclists over this weight limit risk personal injury and property damage. Specifications: - Battery type: LR44/SR44 (x4) - Battery life: up to 120 hours - Weight: 316 g - Max. rider weight: 105 kg - Accuracy: +/- 1.0% - Cleat type: Keo - Q-factor: 53 mm/55 mm with supplied spacing washer - Stack height: 12.2 mm - Field calibration - Adjustable release tension - Garmin Connect - Measurement location: Spindle - Communication: ANT+ and Bluetooth
Single-sensing Pedal-based Power Meter Ride stronger, smarter, connected with the Vector 3S pedal-based power meter. As you strive to beat your personal best on your next race or Gran Fondo, power is the most reliable way to gauge your performance on any given day, at any given time. Unlike other power meters, Vector 3S has a sensor housed in the left pedal, so it delivers reliable, accurate data on every training session. - Installs like any other pedal and quickly transfers between bikes - Reports cadence and total power (watts) - Easily upgrades to dual-sensing system - Fully integrates with Garmin cycling ecosystem for data analysis - Allows for easy updates via compatible Edge cycling computers, ANT+ connectivity or Bluetooth-enabled fitness devices and Garmin Connect Mobile app - Battery life: up to 120 hours - Cleat hardware included WARNING: The maximum weight limit of the cyclist using the Vector system is 231 lbs (105 kg). Cyclists over this weight limit risk personal injury and property damage. Specifications: - Battery type: LR44/SR44 (x2) - Battery life: up to 120 hours - Weight: 324 g - Max. rider weight: 105 kg - Accuracy: +/- 1.0% - Cleat type: Keo - Q-factor: 53 mm/ 55mm with supplied spacing washer - Stack height: 12.2 mm - Field calibration - Adjustable release tension - Garmin Connect - Measurement location: Spindle - Communication: ANT+ and Bluetooth
Whether you're looking to take your training to the next level or you simply want a better way to measure energy expenditure, a power meter is your best bet. And the Power Cranks Ultegra Upgrade Kit are no exception. With our lightweight power sensors on a Shimano Ultegra crankarm, it's the perfect way to enter the power meter game. The development of Power Cranks began with our Human Performance Team looking at riders in realistic scenarios on the bike. Historically, power meters have been validated by two different methods—one is by measuring the produced torque by applying a static, linear load to a crankarm or chainring, while the second uses a power generating motor to pedal the bike. Well, cycling is neither static nor linear, and humans apply power much differently than a machine. So, we found that neither of these methods answers the 'real-world' accuracy question. To get the best test for accuracy, in all types of riding scenarios, we built our own cycling treadmill, the WinMill, to measure power output to a known truth. This new benchmark lets us evaluate accuracy under all riding conditions—seated versus standing, various power and cadence levels, different weights, and a myriad of gear. This data acquisition process is our gold-standard for testing power meters, and through our testing and external validation from the Locomotion Lab in Boulder, Colorado, Power Cranks have been proven to have the highest accuracy in real-world scenarios (+/- 1.5%). The Power Cranks are also easy to live with, with class-leading temperature compensation firmware and waterproof enclosures. Calibration is only required during seasonal-type fluctuations in temperature, and the included wrench makes battery swaps a breeze. - +/- 1.5% real-world accuracy tested on the WinMill and validated by the Locomotion Lab in Boulder, CO. - Works with ANT+ and Bluetooth® devices. - Easy set-up and diagnostics with the Specialized Power app. (iOS and Android versions available). - Shimano 8000 generation Ultegra left-side power measurement. - Right crankarm and spider NOT included. - Available in 170-175mm crankarm lengths.
$349.99 - $663.99
• Comfortable And Natural Hand Position For All Day Riding Comfort • More Stopping Power, With Less Effort, Especially From The Hood Position • High Braking Power Ideal For Cyclocross And On-Road Riding • Fits A Wide Variety Of Hand Sizes From The Hood Position • Mechanical 11-speed shifting • Reservoir Tank Provides Pad Clearance Auto-Adjust To Maintain Consistent Pad Clearance • Both Lever Reach Adjust And Free Stroke Adjust Possible • Includes Shimano SM-BH-59 hydraulic line kit and Shimano mineral oil
Take a quick look at the new X-DOME Eagle cassette. The last dangling shred of an argument in favor of a mountain bike front derailleur is now officially dead. Designed for use with the proven, reliable XD driver body, this 12-speed, 10- to 50-tooth cassette offers an optimal 500-percent gear range at a considerably lighter weight than 2x systems. It carries with it the X-DOME architecture, which, independent tests have concluded, yields the strongest cassettes on the market. New shifting characteristics improve both, inboard and outboard shifting, as well as chain retention. - SRAM’s cassette manufacturing technology provides the greatest durability and lightest weight - All-new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performance - XD driver body compatible - Gear Ratios: 10-50t - Speeds: 12 - Colors: Black - Cogs: 10-50t: 10t, 12t, 14t, 16t, 18t, 21t, 24t, 28t, 32t, 36t, 42t, 50t - Cogs on Cluster: 11 - Compatibility: 12-speed XD driver body compatible
Designed by Garrett Reynolds. Constructed from heat-treated 4130 chromoly with an internal gusset in the toptube and an external gusset on the downtube. The frame’s tubing is double butted with a heat-treated Mid BB shell and headtube, externally butted seat tube with integrated post clamp and integrated chain tensioners. Available with or without removable seat stay brake mounts and cable guide. Geometry: 21" top tube length HT 75.5 Degrees ST 71 Degrees CS 13" 9" seat tube height (bottom bracket to top tube, center to center) BB height: 11.625"
$229.99 - $459.99
Shimano R8050 Di2 dual control lever. - More intuitive shifting operation - Updated features and more defined click feeling - Clearer separation between shift buttons support quick and precise shifting while operating with thick gloves - Customizable functionality to match the rider's style - Each switch has the option for multi-shift ON or OFF - E-TUBE PROJECT - Programmable function of ST top button remote switch for third party cycle computer and shifting - More Reach Adjust range - 2x11-speed - Average Weight: 148 grams
$419.00 $469.99 11% Savings
COMBINING CUTTING EDGE HYDROFORMING TECHNOLOGY WITH INPUT FROM TEAM RIDERS DAN KRUK AND JORDAN GODWIN, THE BATTLESHIP FRAME IS THE PERFECT MATCH FOR THE PROGRESSIVE STREET RIDER. BOASTING AN INCREDIBLY SHORT 12.7" CHAINSTAY, THICKER CNC MACHINED DROPOUTS (DESIGNED TO WORK FLAWLESSLY WITH HUB-GUARDS AND PEGS), AND A FULLY BRAKELESS DESIGN; THE BATTLESHIP IS A SUPER TOUGH, NO-NONSENSE STREET WEAPON WITH OUR MOST RESPONSIVE GEOMETRY YET. Includes lifetime guarantee. SPECIFICATIONS TUBING: Butted, seamless 4130 chromoly tubing japanese TOPTUBE: 20.5", 20.75 "or 21" TT CHAINSTAY LENGTH: 12.7" slammed, 13" centered ANGLES: HT: 75.5 °, ST: 71 ° BOTTOM BRACKET: mid-bb width: 74mm, height: 11.7 ", cnc machined and heat-treated HEADTUBE: taller 127mm height, cnc machined and heat-treated, integ. h / set DROPOUTS: 6mm thick laser cut and heat-treated, new shape for perfect hubguard/peg fit even when slammed SPECIAL FEATURES: Hydroformed top and down tube for the strongest possible connection to the headtube Super strong, technical street frame with the shortest chainstay possible Taller 127mm extended headtube for less spacers with an uncut fork Wider rear triangle allows clearance for a 2.5" tire Fully brakeless frame Slim profile integrated seat clamp
$399.00 $469.00 15% Savings
We revved up the geometry on Tom’s already stiff and strong frame. A steeper head tube, shorter rear end and a lower bottom bracket are exactly what was needed to help Dugan blast off to new heights! Double Gusset with Embossed Script Logo Engraved head tube Investment Cast Seat Clamp Butted Top tube Straight Gauge Down Tube Straight Gauge Tapered Seat & Chain stays Low Profile Chain stay Wishbone Reinforced head tube & mid BB vents American Made SPECS > Sizes 20.75" Rear end length 13.475"-13.875" Head tube angle 75° Seat tube angle 71° BB height 11.65" Standover 8.5? Head tube Integrated Bottom Bracket Mid Dropouts 14mm, 4Q Baked Brake mounts Thread-On 990 (NOT included) Gyro tabs None Weight 20.75" – 4.73 lbs (2.15 kg)
$369.99 - $379.99
Shimano Ultegra Di2 Shadow rear derailleur. - Sleek integrated appearance - New low-profile design - Shimano Shadow RD - Race endurance - Optimized slant angle - Maintain race concentration with more intuitive shift control - System communication with front derailleur - Shimano Synchronized Shift - Wide compatibility - Short cage covers: 11-25T to 11-30T - Medium cage covers: 11-28T to 11-34T - Average Weight: 242 grams (SS type), 249 grams (GS type)
With top end finishes, refined technology, and astoundingly low weight, Specialized's S-Works Phenom means performance. Its generously padded nose lets you scale steep grades, while the rounded tail encourages sliding off the back on descents, and scuff guards ward off damage in case you get a little too rowdy. The Phenom boasts Specialized's renowned Body Geometry ergonomics for all day comfort and super light EVA padding delivers an excellent ride without bulk. You also get a supportive, vibration-damping FACT carbon shell, a weather-resistant top and featherweight FACT-carbon rails. And, it's available in two widths for a perfect fit.
- Rider Tuned Gearing - Wider Gear Combination: 11-28T/12-28T/11-30T (New Gear Combination) - Closer Gear Combination: 11-25T/12-25T - Lightweight - CFRP & Alloy Spider Arm, 5 Titanium Sprockets - Gear Combination: 11-25T, 11-28T, 11-30T (New Gear Combination), 12-25T, 12-28T
$329.99 - $349.99
- Excellent Pedaling Efficiency - Optimized Balance Of Weight And Rigidity - Injection Molded Carbon Composite Body - Hollow Cleat Bolt - Efficient Power Transfer - High Stability - Extra-Wide Platform - Efficient Power Transfer/Durability - Reduces Flex And Pedal Body Wear - Stainless Steel Body Plate - Excellent Pedaling Efficiency - Smooth Rotation - 2-Ball Bearing, 1-Wide Roller Bushing - Reliable Durability Performance - Stable And Uniform Load Distribution - Wide Bearing Placement - Rider Tune - Customize The Entry And Release Tension Settings - Adjustable Entry And Release Tension Settings - Shimano 3-Year Limited Warranty - Average Weight: 224g - Shimano SPD-SL cleats included
$189.99 - $348.99
Shimano's Tiagra Dual Control Lever (2x10-speed) is sleek, balanced and consistent. The Tiagra 4700 series provides serious entry-level riding performance with trickle-down technology from the top shelf Dura Ace line. -Model Number: ST-4700 - Series: Tiagra - Cassette Compatibility: 10-speed - Front Shifting: 2 - Shift Cable: Lever side:OT-SP41 / RD side: OT-SP41 Sealed - Reach Adjuster: Screw
$246.00 - $342.00
SRAM's GX-1400 1x Crankset delivers consistent performance every time out. Featuring SRAM’s X-Sync tooth profile, the GX single-chainring crankset is engineered for complete chain control. Each tooth’s thickness is CNC machined to work seamlessly with the chain’s inner and outer links. - Open Core and X-Sync Technology - CNC machined 7075, two-tone anodized X-Sync chainring (30/32T) - Weight: 680g (GXP, 175mm, 32T)
This derailleur not only answers the Eagle drivetrain’s need for greater capacity, but it’s also the next evolution of SRAM's proven, 1x-specific X-HORIZON design. The larger, 14-tooth X-SYNC lower pulley allows 10- to 50-tooth cassette capacity in this relatively compact design, and also adds to Eagle’s overall smooth-pedaling feel. SRAM's Type-3 ROLLER BEARING CLUTCH features a smoother torque curve for a quieter, more consistent operation and feel. CAGE LOCK has been moved back and out of the way, protecting it from trail debris. And a redesigned, robust mounting system further improves the Eagle derailleur’s performance and overall durability.
Shimano Ultegra R8050 Di2 front derailleur. - Quick and smooth front shifting under high pedaling torque - Programmed control of chain guide - Shimano Synchronized shift - Full and semi synchronized shifting program - Redesigned to fit wider gear pitch without sacrificing shifting - Shorter length of rear center (410mm) with O.L.D. 135mm - System communication with rear derailleur, Programmed control of chainguide works for minimal chance of chain drop - Top Gear Teeth: 46-53T - Chain Stay Angle: 61-66 - Chain Line: 43.5 - Average Weight: 132 grams
The Clutch Hub is a traditional clutch-based coaster hub design that eliminates all of the problematic elements on ordinary hubs and only keeps the parts that work. A new, super-strong FULL 14mm axle, bearing configuration, and drag mechanism design stops the need for constant repairs. Equipped with external slack adjustment, which can be done with a 2.5mm hex key through a hub shell access hole (can be adjusted without removing the wheel), and an improved plastic hub guard spec. Same Clutch coaster hub you’ve come to love, but with a few upgrades. Features: - Maximum strength axle design - Super-durable bearing arrangement throughout - 2.5mm hex key slack adjustment through hub shell access hole. No wheel removal required. - Super-durable drag mechanism design - Crankflip ready Improvements Over the Clutch V1: - 14mm chromoly axle bolts on both the drive and non-drive side for greater reliability - Improved clutch engagement - Improved manufacturing precision throughout - More slack than the V1 hub - All-new durable proprietary plastic spec for the removable hub guard Specs: - 36-hole, 2014-T6 aluminum shell - 9T Driver - Left or right hand drive - 22 oz / 623g Guard Options: - Plastic hub guard included (but optional to use) - Alloy hub guard also available
The Race Face Atlas crank is the burliest alloy CINCH offering; designed to excel across many disciplines including trail, enduro, DH and freeride. Featuring the versatile CINCH interface for interchangeable spiders, limitless ring combinations, a 30mm alloy spindle and compatibility across all relevant frame standards. - Forged 7050 aluminum alloy arms - Bracing matrix at the back of the crank arms for added stiffness - Industry standard 30mm spline interface - Removable spider offers the ability to convert between existing chainring standards while remaining flexible to future developments - Interchangeable spindle option of the Cinch system allows you to use the same crankset with 68/73mm and 83mm frames, as well as the RF BMX spindle and spider - Spindle diameter: 30mm - Direct mount chainline: 48.5, 55mm (Flipped) - 2X Cinch spider chainline: 47mm - Boost 2X Cinch spider chainline:50mm - Weight: 690g
Ride anywhere with this wide range XG-1275, 10- to 50-tooth Eagle cassette that provides the right gear. Fast on the flats. Control on the climbs. Dictate your own pace, anywhere. Only Eagle technology is the 1x drivetrain engineered for infinite freedom. FULL PIN technology uses lightweight, stamped steel cogs held together with high-strength stainless steel pins. The result: a cassette that’s light and strong. The open design similar to SRAM's X-DOME cassette aids in mud clearance, giving you cleaner shifting performance and longer component life. X-GLIDE2 improves both inboard and outboard shifting, as well as chain retention. - 11 stamped steel cogs plus aluminum 50 tooth cog - Open design aids mud clearance - Cassette Body Type: SRAM XD 11/12 Speed - Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-50 - Drivetrain Speeds: 12 - Range: 10-50 - Weight: 450 g
The new Power Arc Pro expands on the success of Specialized's original Power saddle. It features the same channel and length as the original and S-Works Arc, but where it differs is in its titanium rails versus the carbon fiber found on the S-Works. But this means that it still features a stiff, FACT carbon fiber shell and lightweight EVA padding. The shape of the saddle is also designed to provide ample sit bone support, and this has been coupled with a shorter-than-usual nose section to keep pressure off of soft tissue while riding in aggressive positions. They even took this ideology a step further via an extra wide and elongated Body Geometry channel that's been proven through blood flow testing and pressure mapping to reduce unwanted numbness and pressure. And while this all seems familiar if you're already a Power loyalist, this iteration features a curved Body Geometry shape that better contours to your body. What does this mean for your ride? It means that you'll feel as if you're “in the saddle" and not on it. And ultimately, this equates to greater comfort and superior performance in all seated positions, whether you're a man or woman. Specialized also replaced the traditional PU padding for an Elaston foam construction that's made up of small beads that are expanded into the foam. The result? The feeling off sitting on 1,000 miniature pillows rather than one piece of foam. And to keep the comfort coming, we rely on our extra-wide, elongated Body Geometry channel and short nose to provide you with proper sit bone support. - Patented Body Geometry design is lab-tested for both men and women to ensure blood flow to sensitive arteries. - Stiff FACT carbon fiber shell is tuned for support and ride compliance. - Elaston foam provides unrivaled comfort and support on longer rides. - Lightweight, durable, and hollow titanium rails. - Level II padding: Medium density foam for bike feel with additional cushioning. - SWAT-compatible mounts molded into the saddle base allow for sleek and integrated storage solutions.
$229.99 - $239.99
The Helix hub will take you backwards in style and holds up to any peg abuse that comes its way. Pair it up with WTP's plastic hub guards for extra protection (sold separately). - 6061-T6 alloy refined hub-shell - 14mm hollow bore / hardened heat-treated chromoly axle - Two-high quality sealed bearings - Twin sealed bearing and bushing system - One-piece driver design - Unique internal arrangement with face-bearing clutch stopper
A day of slicing through sweet ribbons of singletrack on a bike sporting a RockShox 30 Silver will leave you smiling all the way to the bank. Race-proven plushness and ease of setup means more time on the trail and less time tinkering. Lightweight and packed full of legendary RockShox technology, the 30 Silver is sure to boost the level of your ride without boosting your wallet in the process. - TurnKey damper - Crown Race: 30mm - Steerer Tube Length: 265mm - Positive Spring: Coil - Negative Spring: Coil - External Adjustments: Rebound Damping, Low Speed Compression Damping - Maximum Tire Width: 62mm - Maximum tire size: 26 x 2.4"
The ‘turbo’ of spike tires. With 361 spikes it bites firmly into icy roads. The tungsten carbide core of each spike is clad in weight-saving aluminum. The scales stop at 695 g, yet the tire remains agile and sporty. - LiteSkin: The lightest option. LiteSkin MTB tires forego SnakeSkin, but still have high pressure resistant tire beads. If you don't mind the extra effort, these tires can also be converted to Tubeless by using a liquid sealant. - Winter compound - Folding bead
Specialized's Phenom Pro is a World Cup-level off-road saddle. Its generously padded nose lets you scale steep grades, while the rounded tail encourages sliding off the back on descents, and scuff guards ward off damage in case you get a little too rowdy. The Phenom boasts Specialized's renowned Body Geometry ergonomics for all day comfort. You also get a supportive, vibration-damping carbon-reinforced shell, a weather-resistant top and featherweight FACT-carbon rails. And, it's available in three widths for a perfect fit.
Specialized's ultra-light Power Pro saddle is Body Geometry designed for both men and women to have top performance in a more aggressive position. Proven through blood-flow testing and pressure mapping, the extra-wide and elongated Body Geometry channel and proper sitbone support allows for all day comfort. •Patented Body Geometry design is lab tested for both men and women to assure blood flow to sensitive arteries • Stiff FACT carbon fiber shell tuned for support and ride compliance • Lightweight and supportive PU padding for comfort and support on longer rides • Lightweight and durable hollow titanium rails • Tough, light and water-resistant cover • Level 1 padding: Lightest level of padding; most direct connection to the bike • SWAT compatible mounts co-molded into the saddle base allow for sleek and integrated storage solutions
Keep it low and aero without sacrificing comfort. The carbon-railed, ultra lightweight Specialized Romin EVO Pro is a high-performance road saddle that's contoured to put you in a position for optimal power transfer and comfort as you put pressure on your competition. The Body Geometry channel is designed to maximize blood flow, while the saddle allows you to maintain comfort easily, even while in a competitive, more aerodynamic position. - Patented Body Geometry design is lab tested to assure blood flow to sensitive arteries. - Stiff, carbon-reinforced shell for longevity and all-day riding efficiency. - Super-light, PU padding for comfort and support on longer rides. - Ultra-light and strong, oversized FACT carbon rails. - Tough, lightweight, water resistant Micromatrix cover. - Level 2 padding: Medium density foam for bike feel with additional cushioning. - SWAT compatible mounts molded into the saddle base allow for sleek and integrated storage solutions.
- DCF saddle selection process— simple, comprehensive, visual results in 10 minutes or less showing exactly how a rider contacts the saddle and which shape is best - High performance material specification - Vacuum formed strong, durable high-quality microfiber cover - Lightweight foam fill - Strategically placed Particle Flow Technology - Carbon Composite base material - Carbon Fiber Rails
The Specialized Ruby Pro is an ultra-light and stiff saddle for women with minimal padding. It's designed with a Body Geometry shape that provides comfort and pressure relief on long rides, plus its Adaptive Edge technology allows the Ruby's edge to adapt to the shape of the body for extra support and pedaling efficiency. - Women's Body Geometry cutout is scientifically tested and ergonomically designed. - Stiff, carbon-reinforced shell with flexible Adaptive Edge technology. - Super-light padding for comfort and support on longer rides. - Ultra-light and strong, oversized FACT carbon rails are smoothly integrated into the base. - Tough, lightweight, water-resistant Micromatrix cover. - Level 2 padding: Medium density foam for bike feel with additional cushioning. - SWAT compatible mounts molded into the saddle base allow for sleek and integrated storage solutions - Size 143mm / Weight 192g - Size 155mm / Weight 193g - Size 168mm / Weight 204g - NOTE: Oversized 7x9mm carbon rails are not compatible with seatposts equipped with side-load clamp mechanisms for 7mm round rails.
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