Cassettes/Freewheels

The product that set the standard and still the best available! The GC line of cassette extender cogs allow you to modify your 10 speed cassette into a wide range cassette. To achieve the optimal shifting, the GCs are optimized for Shimano or SRAM cassette so always select the correct type for the cassette brand you have. Compatibility: - Compatible with SRAM 10 speed cassettes listed on the GC tech page - Compatible with all 10 speed chains - Note that you may need a longer chain that you currently have on your bike - Chain stretch should be less than .5 when installing a new GC - Compatible with all 10 speed rear derailleurs except non-clutch type SRAM rear derailleurs model year 2012 and older - These older rear derailleurs do work with the GC40. - Can be run in 2x configuration with a long cage rear derailleur - These may fit tightly on some over-sized hub bodies such as Stan's No Tubes 3.30 and the Easton X4 hubs. With a little filing and some grease they will go on.

- Extended range aluminum cog for those wanting 1x10 with a full range of gears - Only fits Shimano XT/XTR 11-36t (M771/M980) or SRAM X5/X7/X9/X0 11-36t 10sp cassettes (not compatible with 2011 and older SRAM derailleurs) - Requires removal of the 17T or 15T cog and spacer from existing cassette - Longer B-screw (sold separately) only needed for about 50% of Shimano derailleurs - May require a longer 10sp chain. Very tight fit on Stans 330 rear hub splines - Designed and manufactured in the USA from 7075-T6 aluminum alloy

Pair this cog with your Shimano-compatible rear hub, spacers and a lockring (sold separately) and discover the joy and simplicity of a singlespeed without the cost of a new wheel. Machined from heat-treated chromoly and then chrome plated, these seriously tough cogs are strong, shiny and they come in sizes from 13T to 22T so you can pick the perfect gear.

Machined from heat-treated, chrome-plated chromoly, these seriously tough cogs will hold up to massive track sprints and crazy skid-stops. Surly's Track Cogs are strong, shiny and they come in two widths and sizes from 13T to 22T so you can select the perfect gear.

- MODEL NO: CS-HG700-11 - SERIES: SHIMANO 105 R7000 Series - Average weight: 379 g - Combination: 11-13-15-17-19-21-23-25-27-30-34T - Combination name(Group name): 11-34T - Compatible chain: HG-EV 11-speed/HG-X11 - Speeds: 11-speed - Spider arm_QTY (pcs): 1 - Type: HG-EV

- Special single gear design with chain tensioner - Revised tooth profile to prevent chain skip - MODEL NO: CS-S500 - SERIES: SHIMANO ALFINE S7000/S700 Series - Gear thickness (mm): 2.0 - Recommended chain: Super Narrow HG for 9-speed - Gear Teeth: 18T, 20T

- MODEL NO: CS-HG400-9 - SERIES: SHIMANO ALIVIO M4000 Series - Compatible chain: HG 9-speed - Speeds: 9-speed - Type: HG

- Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed - Drivetrain Speeds: 8

- MODEL NO: CS-HG201-9 - SERIES: SHIMANO ALTUS M2000 Series - Combination: 11-13-15-17-19-21-24-28-32T (bo), 11-13-15-17-20-23-26-30-34T (bn), 11-13-15-17-20-23-26-30-36T (bw), -, -, -, - - Combination name(Group name): 11-32T (bo), 11-34T (bn), 11-36T (bw) - Compatible chain: HG 9-speed - Speeds: 9-speed - Type: HG

- MODEL NO: CS-HG50-8 - SERIES: SHIMANO CLARIS R2000 Series - Compatible chain: CN-HG71 - Speeds: 8-speed - Type: HG

- MODEL NO: CS-HG500-10 - SERIES: SHIMANO DEORE M6000 Series - Combination: 11-12-13-14-15-17-19-21-23-25T, 12-13-14-15-17-19-21-23-25-28T, 11-12-14-16-18-20-22-25-28-32T, 11-13-15-17-19-21-23-26-30-34T - Combination name (Group name): 11-25T, 12-28T, 11-32T, 11-34T - Compatible chain: HG-X 10-speed/HG 10-speed/CN-HG500 - Speeds: 10-speed - Type: HG

• Steel construction on all but the largest aluminum gear • Nickel-plated finish for corrosion and wear resistance • Dyna-sys 11-speed cassette with "Rhythm step" gearing for closer gear ratios and smoother shifting performance • Fits Dyna-sys 11-speed and current Shimano 9/10-Speed MTB hubs • The largest cog (40t) is positioned inboard and above the drive-side flange • Hubs with tall drive-side flanges may not be compatible due to spoke interference

Reliable, perfect shifting awaits with Shimano's Deore XT Dyna-Sys Cassette. It features chrome-plated steel sprockets mounted to two aluminum carriers for an ideal blend of durability and low weight. Closer gear ratios in the middle of the cassette ensure you'll have the perfect gear for the trail's ups and downs. Plus, the cogs are ramped and machined for flawless, lightning-fast shifts.

Shimano XT CS-M770 9-Speed Cassette - Aluminum carrier reduces weight and increases rigidity - Cassette Body Type: Shimano/SRAM 8, 9, 10 Speed - Drivetrain Speeds: 9 - Weight: 323 grams

Shimano Cassette Lockrings

Shimano Cassette Lockrings.

- 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

Shimano Cassette Lockrings

Shimano Dura-Ace R9100 Cassette Spacers

Shimano HG-800 11-speed cassette. - High-performance gear combinations provide superior rider choice - With hub body for MTB to fit a variety of bikes from MTB to road - Average Weight: 335 grams

Shimano's SLX Dyna-Sys 10-Speed Cassette features chrome-plated steel sprockets mounted to an aluminum carrier for an ideal blend of durability and low weight. Closer gear ratios in the middle of the cassette ensure you'll have the perfect gear for the trail's ups and downs. Plus, the cogs are ramped and machined for flawless shifts with the 10-speed chain and Shadow rear derailleur (both sold separately).

- MODEL NO: CS-HG200-7 - SERIES: SHIMANO TOURNEY - Combination: 12-14-16-18-21-24-28T (bm), 12-14-16-18-21-26-32T (bp) - Combination name (Group name): 12-28T (bm), 12-32T (bp) - Compatible chain: IG/HG - Speeds: 7-speed - Type: HG

You've got to have the right ratio for the track, and Shimano's Dura-Ace cogs come in a range of tooth counts so you can always be prepared. Manufactured from durable chromoly steel, each cog is machined to run perfectly straight.

Shimano's Ultegra 10-Speed Cassette delivers pro-level shifting and durability. The computer-enhanced tooth shapes and tough cogs mean you can shift quickly, precisely and smoothly even under pressure.

Shimano Ultegra CS-6600 10-Speed Cassettes - Ultegra CS-6600 cassettes with a 13-16-tooth first-position cog are not compatible with Dura-Ace FH-7800 hub or WH-7800 wheel - Compatible with all 10- and 9-speed Shimano hubs except for 13-16-tooth first position cog cassettes which are not compatible with DA FH-7800 hubs or WH-7800 wheels

- High-performance gear combinations provide superior rider choice - Hub body to fit a variety of bikes from MTB to road - Model Number: CS-HG800-11 - Series: Shimano - Average Weight: 335 grams

Take a quick look at the 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 SRAM's 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.

Designed for the next generation of drivetrains—and the next generation of riders. The SRAM Force XG-1270 cassette is optimized for electronic shifting and features SRAM's X-Range gearing technology. Smooth, precise shifts, from 10T on up. - Features at least five one-tooth jumps for a smoother gear progression - 10-tooth start helps provide a wider gearing range - Designed to work with an XDR driver body - MINI CLUSTER construction reduces weight and increases durability - All Zipp wheels starting from 2012 are XDR ready Cassette Cogs: - 10-26t: 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 23, 26 - 10-28t: 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 24, 28 - 10-33t: 10, 11, 12, 13, 14, 15, 17, 19, 21, 24, 28, 33

SRAM's 1050 10-Speed Cassette is a great choice. It's constructed of light and durable materials and boasts SRAM's PowerGlide tooth profiles and shift ramps for quick and positive gear changes every time. This trick cassette also sports a semi-spider construction for a maximum stiffness-to-weight ratio and is available in myriad configurations to suit all your riding. There are even models with 36-tooth largest cogs for super-easy climbing.

SRAM's 1070 10-Speed Cassette is a great choice. It's constructed of light and durable materials and boasts SRAM's PowerGlide tooth profiles and shift ramps for quick and positive gear changes every time. This trick cassette also sports a semi-spider construction for a maximum stiffness-to-weight ratio, a lightweight aluminum lockring, and is available in myriad configurations to suit all your riding. There are even models with 36-tooth largest cogs for super-easy climbing.