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RSP Cassette Expansion Sprocket

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From £32.95
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4 reviews
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Product Description

Easily extend your current 36t cassette to 40 or 42t cassette.
  • 40 & 42t versions available
  • Available in Black, Red & Blue
  • Coverts 36t 10 speed cassettes to 40 or 42t
  • Compatible with most cassettes
  • Simply remove your 17t sprocket to make room for your expansion sprocket
  • Compatible with medium and long cage derailleurs
  • Extended derailleur limit screw supplied which will be required for some derailleurs

RSP Cassette Expansion Sprocket Reviews

Write your own review
Overall Rating:
4.5
out of 5
4.46
Build Quality
4.88
Performance
4
Value For Money
4.62

Customer Reviews (4)

3
Not universally compatible

Unfortunately it seems that unless you have a Shimano XT or XTR cassette (or other cassette that breaksdown into more component parts) you cannot use this expansion sprocket. Despite chatting with the guys at Tredz I could not do as they suggested and loose the 13t sprocket and re-assemble the modified cassette even if I wanted to loose that useful sprocket. the middle group of sprockets were riveted together so I was not able do as the instructions suggested. Pity, I might upgrade the cassette and have another go sometime.

Unfortunately it seems that unless you have a Shimano XT or XTR cassette (or other cassette that breaksdown into more component parts) you cannot use this expansion sprocket. Despite chatting with the guys at Tredz I could not do as they suggested and loose the 13t sprocket and re-assemble the modified cassette even if I wanted to loose that useful sprocket. the middle group of sprockets were riveted together so I was not able do as the instructions suggested. Pity, I might upgrade the cassette and have another go sometime.

Close review
2.8 out of 5
Build Quality: 4.5/5
Performance: 0.5/5
Value For Money: 3.5/5
5
Easy to climb

I used with 32T oval ring , very easy to climb huge hills.

I used with 32T oval ring , very easy to climb huge hills.

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5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5
5
10/10

Bought for my wife's bike, which is now 1x10. Fitted easily and so far has performed brilliantly. Came with longer b limit bolt, with a hex head, so no more rounded out philips screws.

Bought for my wife's bike, which is now 1x10. Fitted easily and so far has performed brilliantly. Came with longer b limit bolt, with a hex head, so no more rounded out philips screws.

Close review
5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5
5
Great value expansion sprocket

Very impressed with the quality of this so far. Was easy to install and has given me that little extra for steeper hills - recommended!

Very impressed with the quality of this so far. Was easy to install and has given me that little extra for steeper hills - recommended!

Close review
5 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 5/5

Casettes Guide

What are cassettes?

A bike cassette is the cluster of rear gear cogs attached to the rear wheel.

Who needs a cassette?

Any conventional derailleur-geared bike has a cassette, whether it’s a road bike, a mountain bike or a hybrid. The alternatives are a singlespeed or a hub gear on the rear wheel.

What are the choices?

The main difference between cassettes is the number and size of gear cogs on them. Seven, eight, nine, 10 and 11-speed are the most common.

What should I buy with them?

If you’re replacing your cassette, sometimes you have to replace other parts of your drive train such as your chain or chainrings. This is because they wear evenly together.

Anything else?

With some cassettes you don’t need to replace the whole unit. Instead, just part of the cluster is detachable, so you only swap out the most worn cogs.

Delivery & Guarantee

Christmas Delivery

We will try our very best to get your products delivered to you before Christmas, but due to Santa's overspill into our delivery services, we would like to make you aware that while we are making every effort to deliver your order to you in time for Christmas, there may be a potential risk of delay.

The last date to order a bike that is available for Christmas delivery is 5pm on Tuesday 18th December. For all other items the last date to order items that are available for Christmas delivery is 12pm on Wednesday 19th December.

You can easily spot which items are guaranteed for Christmas delivery with the icon. Choose your size and colour to see if the item qualifies for Christmas delivery.

UK Delivery Information

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

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