VeloSolo Bolt on CRO-MO DISC COG 1/8 3/32 fixed track sprocket fixie electric UK made, lifetime guarantee, sizes: 16 17 18 19 20 21

$59.98 Buy It Now, $25.66 Shipping, eBay Money Back Guarantee
Seller: velosolo-bikes ✉️ (17,628) 100%, Location: London, GB, Ships to: AMERICAS, EUROPE, ASIA, AU, NZ, Item: 381942782204 VeloSolo Bolt on CRO-MO DISC COG 1/8 3/32 fixed track sprocket fixie electric.

IMPORTANT: update February 2023 - this is the FINAL stock that VeloSolo will make of these, once they are gone they are gone!

6 Bolt Disc Mount VeloSolo 1/8" or 3/32" Fixed Wheel Cog

Thousands sold worldwide since 2007!

Please note some of current stock is satin finish (not polished).

We do have our 7075-T6 version available in many options too - these are not steel but still *very* hard wearing top grade aircraft spec heat treated aluminium, link here: https://www.ebay.co.uk/itm/VeloSolo-UK-Bolt-CNC-1-8-3-32-Disc-Cog-16-17-18-fixed-track-RED-BLACK-GOLD-/380274026555?var=&hash=item97577c336c

PLEASE NOTE: due to an eBay software glitch the original listing for this item running for many years with all its history of sales since 2010 was lost (thanks eBay!), this is the new identical listing.

Mounts to any standard 6 bolt disc-hub to convert your track, road, or mountain bike into a fixed wheel. This sale is for one cog only - no hubs, chains, bolts etc are included.
  • Custom manufactured in England by the UK's leading motorcycle sprocket engineering company with 70 world champions to it's name.
  • Unlike cheap laser cut or stamped cogs VeloSolo cogs are made the old fashioned way from start to finish.
  • Machined from solid blanks of EN36 chro-moly steel. Teeth precision milled and mounting holes drilled to very tight tolerances.
  • Heat-treated for strength and wear resistance before final bright nickel plating and laser engraving.
  • Very strong, very round and a perfect fit on any 6 bolt disc hub. Reversible without affecting chainline for even longer life.
  • Thousands now in use around the world since we began manufacturing these in 2007.
  • As well as regular bicycle applications these have been used in hundreds of projects from electric bikes to HPV builds, coffee grinding bikes to weird and wonderful machines of all descriptions.
  • Now guaranteed for life to the original owner - see below for terms and conditions.
  • For road, track or mountain bikes. Available in 1/8" and 3/32" widths and 16, 17, 18, 19, 20 and 21 teeth. (15t and 22t also available in our other listings).

OK, but why use a bolt-on cog instead of a traditional screw on cog?
  • An end to the possibility of damaged hubs, seized cogs and stuck lockrings.
  • Change cogs with one small Torx or hex key - no chain whips or lockring wrenches needed.
  • 100% solid mount - six M5 hardened steel bolts give the stiffest most secure interface possible.
  • Zero slippage or movement possible, simply 100% power transfer - forwards or backwards.
  • Precise and simple adjustment of chainline for a perfectly smooth drivetrain.
  • Converts a disc hub MTB to a fixed wheel in seconds - try fixed off-road without building a new wheel.

We are confident these are the very best and hardest wearing disc mount cogs available and are now guaranteeing the original purchased cog for life to the original owner. If you wear out your original purchased cog we will replace it with one of the same size absolutely free of charge. Terms and conditions: guarantee applies to the *original* owner only, cog must be run in both directions evenly and flipped frequently, postage costs not included, claims must be accompanied by the *original* paper proof of purchase, please contact us prior to return.  Commercial use is excluded.

This sale is for ONE cog in 1/8" or 3/32" width with 16, 17, 18, 19, 20 or 21 teeth. See shop for 15t and 22t listing. Our 7075-T6 version is also available in our eBay shop. PLEASE NOTE: other items shown for illustrative purposes only and NOT included.

Please see our guide to the Disc Cog system and fixed and singlespeed conversions here: ebay Fixed and Singlespeed FAQ.


We manufacture a range of UK made precision bike components including drilled disc hub mount and standard threaded cogs as well as chainrings and associated components. In addition we are now retailing a growing range of fixed wheel and singlespeed products from many other companies suitable for road and off-road bikes. Please see the 'About Me' page for more about dealing with VeloSolo.

Please visit our eBay shop for a large variety of components for your track, road or mountain bike.

If you have any questions please do not hesitate to click on 'Ask seller a question' above.


Buying from VeloSolo

We will always deal with our customers and fellow cyclists promptly and courteously. When making a purchase you will be kept informed throughout the transaction. Please check our feedback for our many repeat buyers. We have conducted business on ebay for over twenty years dispatching thousands of items to more than 50 countries all around the world.

Shipping: we ship internationally wherever you may be. All items are packed very carefully and dispatched the very same day wherever possible. Orders are sent First Class in the UK (1-2 days) and both Airmail to Europe (3-7 days) and the USA (7 -10 days).

Returns: if this item should fail to meet your expectations, please return it unused in the original packaging within 10 days and we will refund without question (shipping costs not included). Please return items by registered post. If you have any queries or problems with your order, however small, please let us know.


© VeloSolo Bikes 2023


  • Condition: New
  • option: 1/8" 16t
  • Part Type: disc hub
  • Brand: velosolo

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