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Oneup Components Cassette Expander Kit
Oneup Components Cassette Expander Kit
Oneup Components Cassette Expander Kit
Oneup Components Cassette Expander Kit
Oneup Components Cassette Expander Kit
Oneup Components Cassette Expander Kit

Oneup Components Cassette Expander Kit

Item #: CS219B00
USD$80.00
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Oneup Components Cassette Expander Kit

Please Note: Pictures are for illustration purposes only. Cassette and Rear Derailleur are sold separately.

OneUp Cassette Expander Cog Kit

The OneUp 40/42T Sprocket is a cost effective way to extend the gear range on your 10-speed drivetrain. Compatible with both 1x and 2x drivetrains, the OneUp 40/42T Sprocket easily installs to your 11-36T or 12-36T cassette (not compatible with all 10-speed cassettes; see below for details). To install, you simply remove the 17T cog and 1 cassette spacer from your freehub to make room to slide this giant cog on –better yet, the OneUp 40/42T Sprocket now ships with a 16T cog to replace both 15T and 17T to provide more even cassette progression which results in a smoother cadence with improved shifting.

OneUp Cassette Expander Cog Kit Features

  • Reaps 90% of the benefits of a 1x11 drivetrains at 10% of the cost
  • Compatible with most SRAM and Shimano 10spd components
  • Compatible with 1x10 and 2x10 drivetrains
  • Uses standard freehub driver bodies
  • 16T sprocket provides more even cassette progression for smoother cadence and improved shifting
  • 12 upshift points optimized for most 11-36 cassettes
  • Uses original 28,32,36T steel sprockets for maximum durability
  • Patented (US 9,011,282) other patents pending
Specifications
10-Speeds 11-13-16-19-21-24-28-32-36-40/42
Sprocket Material 7075-T6 (40/42), Chrome plated hardened steel, (16T)
Sprocket Weight 18g (16T), 70g (40T), 71g (42T)
Weight Increase 51g
Typical 3x to 1x System Weight Decrease 367g
Cassette Range Improvement 11% (40T) 17% (42T)

OneUp Cassette Expander Cog Kit Compatibility

The OneUp adapter sprocket is compatible with most 10 speed mountain setups running an 11-36T or 12-36T cassettes. That being said, please see the Compatibility Chart on OneUp's website to see if your cassette is compatible with an 40/42T Sprocket. You can view the compatibility chart by clicking HERE

REVIEW SNAPSHOT®

by PowerReviews
Oneup Components Cassette Expander Kit
 
4.6

(based on 64 reviews)

Ratings Distribution

  • 5 Stars

     

    (45)

  • 4 Stars

     

    (16)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

97%

of respondents would recommend this to a friend.

Pros

  • Easy to install (44)
  • Attractive (38)
  • Lightweight (27)
  • Durable (19)

Cons

No Cons

Best Uses

  • Mountain biking (47)
  • Upgrade (13)
  • Racing (3)
    • Reviewer Profile:
    • Avid cyclist (43), Casual/ recreational (5)
    • Was this a gift?:
    • No (49)

Most Liked Positive Review

 

It works but can be difficult to dial in

Although it can save you a great many $$$, it is difficult to dial in. I used the 16T cog and found it difficult to shift up into and up out of....Read complete review

Although it can save you a great many $$$, it is difficult to dial in. I used the 16T cog and found it difficult to shift up into and up out of. It appears that the 16t needs to be broken in. Many people forgo it and just remove their 17t to keep the native cogs in the mix. if you do not have this precisely indexed and the b-screw at exactly the right point, you will have problems shifting. As for the 42t, the thing you might notice first is that it doesn't make as much of a difference beyond a 36t as you had hoped. You are not suddenly pedaling up that much more terrain than you were before. You are just putting in less effort getting up what you did before and still pushing your bike up in parts you had hoped the 42t would allow you to clear. There really is no substitute for sub-28 lbs bike. If you are like me, you probably went 1 x 10 to lighten things up, but while I went down to 32.5lbs. it is probably not enough to warrent getting rid of the front derailleur though. But if your bike is light enough to not need the front granny then this is a vastly cheaper solution than 1x11. I used the Rad cage for a Shimano SLX RD.

VS

Most Liked Negative Review

 

not a bad product

i bought this ex-cog to convert my scott hard tail to a 1 x 10. the install was easy, and one up industries is great at replying to your questions in a timely...Read complete review

i bought this ex-cog to convert my scott hard tail to a 1 x 10. the install was easy, and one up industries is great at replying to your questions in a timely manner.

i am running this thing with my brand new 11-36 shimano XT cassette, and the install was prett simple. it is a big jump from the 36 to the 42 tooth ex-cog and it doesnt shift as smooth as a would like, but it was expected. you also have to replace one of the cogs in your cassette with a supplied cog as well, and i still have not gotten it to shift very smooth between the shimano cogs and the installed one up cog. i am still hopeful i can dial it in.

so far, i am loving the simplicity of having no front derailleur, but you will definitely notice the gearing change. i am running a 32T front chainring and when engaged with the 42 T one up cog, you get a gear ratio of roughly 1.3, while with my stock setup, i had a 24T front and a 36T rear cog and a granny ratio of 1.5. you will notice the difference in your first ride or two during some long climbs, but if you are intrigued by simplifying your bike, this is the way to go.

Reviewed by 64 customers

Displaying reviews 1-10

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5.0

Works good

By Wes

from Oakland, CA

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Works well so far using a 2015 10-Speed deore rear derailleur. No need for longer B screw. Some derailleurs (XT and XTR) may need a new oneup rdr cage too to make it not skip, which begs the question: should I just go to 11-speed setup?

 
5.0

Cool addition to 10 speed drivetrain

By Tom

from Ma

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Easy to install

 
5.0

Great upgrade

By Mtneertim

from WEAVERVILLE NC

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Use on my 1x10 on 2011 GF hardtail...

 
5.0

Perfect way to go 1 X 10.

By Daniel Tenorio

from Mexico

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Removed the 17 and 15 teeth cogs from a XT 11-36 cassette, installed the 16 teeth cog instead, and the progression is excellent!!
If you want to go 1X10 choose this item. Is perfect.

 
4.0

Works well

By JND

from MA

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

I have this set up on a 2012 SRAM XO 2x10 drive train with a XT cassette. I wanted a 22 front/36 rear and now have the equivalent with 24 front/40 rear. Shifting is decent as long as you avoid big/big which you should do anyway. Getting out of this combination requires some persuasion.

 
5.0

Great

By D

from Montana

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Cool

 
5.0

Wort every penny

By ReyV Weekend warrior

from Jersey City, NJ

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

Excellent product. Shift flawlessly with my SRAM X9. Made my riding better and simpler converting my drive-train from 2x10 to 1x10.
Also green color option match my Camber 29'er black/lime color.

 
5.0

Great upgrade to my drivetrain

By Brian

from Burlington, VT

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

I increased the range on both ends by purchasing the expander cog kit and a new front chain ring. Works great, I really like how it's a smooth transition throughout the range with the 16 tooth sprocket included.

 
1.0

Not what I expected

By SuperKaos

from hickory, nc

Verified Buyer

Comments about Oneup Components Cassette Expander Kit:

I purchased the Oneup kit along with the Shimano M771 Xt 10 Speed Cassette and have tried it on two bikes. A Giant XTC carbon HT, and my Specialized Stumpjumper FSR. And the downshift point from 8th to 7th is just miserable. I have tried it both with the included 16t sprocket and by just removing the 17t from the 771 cassette, just as their instructions dictate. And yes I have timed the included 16t sprocket correctly. If you're just trail riding it would be, "OK" I guess. But in trying to do laps at my local trail for the best times, all it did was slow me down with grinding 7th gear time after time.

 
5.0

Very simple upgrade

By Ryan L

from Spokane, WA

Comments about Oneup Components Cassette Expander Kit:

I was very happy that this installed as easy as it did. In 15min I had my bike apart, back together, and shifting smoothly. For some reason I really expected to have to mess with my rear derailleur more to get this my bike shifting correctly, only needed to adjust my b-limit screw for the new 40t.

Displaying reviews 1-10

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Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

2 Questions | 2 Answers
Displaying questions 1-2
  • Q:

    This product is compatible with 9 speed shimano cassette
    Asked on 11/10/2016 by Danny from San juan Puerto Rico

    0 answers

  • Q:

    I have a BMC TF03 running on a 2x10 setup.
    Shimano CS-HG50, 11-36

    Is this compatible? I wanted to make sure before purchasing it.
    Many Thanks!
    Asked on 10/16/2016 by einstein from Abu Dhabi

    2 answers

    • VERIFIED BUYER

      A:

      If you go to One up website they have a compatability list
      Sent from my iPhone

      Answered on 10/17/2016 by Anonymous
    • VERIFIED BUYER

      A:

      Mine was fitted to a Sram 11-36 2x 10 set up,no installation or set up issues,and have been running fine for more than a month,so compatibility is not an issue either.Very happy with the product.,it seems it is compatible with your shimano setup,go for it.
      Njinga

      Answered on 10/16/2016 by Anonymous
Displaying questions 1-2

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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.