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Oneup Components Shimano 45T Expander
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Oneup Components Shimano 45T Expander

Item #: CS212Z00
USD$90.00
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Oneup Components Shimano 45T Expander

OneUp Cassette Expander Cog Kit

The OneUp 45T Sprocket expands a 11-40 cassette by 12.5% speed drivetrain. Go ahead and change to a 34 tooth up front and re-gain some low speed. Compatible with 1x and 2x drivetrains, the OneUp 45T Sprocket easily installs to your XT or XTR cassette (not compatible with all 11-speed cassettes) To install, you simply remove the 18T cog and 1 cassette spacer from your freehub to make room to slide this giant cog on -better yet, the OneUp 45T Sprocket now ships with a 18T cog to replace both 17T and 19T to provide more even cassette progression which results in a smoother cadence with improved shifting.

OneUp Cassette Expander Cog Kit Features

  • Cassette progression: 11-13-15-18-21-24-27-31-35-40-45
  • Sprocket material: 7075-T6 Aluminum (45T), Nickel plated hardened steel (18T)
  • Sprocket weight: 65g more than stock 11-40 cassette
  • Compatibility: For XT/XTR M8000/M9000 11-40T cassettes. 11 Speed only. Standard freehub driver.
  • Cassette range improvement: 12.5%
  • Color: Matched to XTR
5.0 / 5.0
3 Reviews
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The Big Bad Wolf had lots of teeth too!!
Delivered on time as always! Packed with pride and it shows. Thanks Jenson!

PROS: Lightweight, Attractive Design, Durable, Easy To Install

BEST USES: Casual Riding, Better Gear Ratios, Mountain Biking, Upgrade
February 6, 2016
Location:
Buckner,ky
Great add on. Did exactly what I wanted it to do.
Service was great. Some of my parts had to be back ordered. Waited 2 weeks for a couple of parts.
May 3, 2016
Location:
Boise, Idaho
The bigger is the better
I had one installed on my Orbea Oiz with XTR Di2 rear derailer. The only issue is that I have to bring it to the shop for the technician to adjust the derailer which only designed for 40T cassette. After the adjustment, I worked flawless on any terrain.

A week later, I ordered another one and installed on my Orbea Occam which has the same drivetrain.

I hope the company which have new model which convert the cassette to 12-speed in the future.

PROS: Easy To Install, Attractive Design
February 22, 2016
Location:
Arlington, TX

Q & A

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Browse 1 question Browse 1 question and 7 answers
Can I still use my existing chain for this upgrade. I got xtr long cage 11-40t cassette and 1x 32t on front
don sevilla on Oct 19, 2016
BEST ANSWER: Yes this will work with your cassette and 1 x 32 front chain ring. Just make sure to put a new chain on that is a few links longer, I would say at least 3 as the 45T is pretty big and you dont want the max the rear derailleur out when you are in this gear. I use it with the OneUp 32 chainring with the spacers and it will straighten out the chain-line. You should be able to peddle backwards with no problem too.

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.