USE Sumo Clamp Kit

Customer Reviews (4)
2.5 / 5| Write your review
£27.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Seat post clamp kit for use with USE Sumo seat posts.

Available in the following sizes:
- 7mm Standard Circular Rail for all standard rails
- 8mm Diameter Circular Rail for Fizik Aliante 1
- 9mm High x 7mm Wide Oval Rail for Fizik Arione CX Carbon, Antares / Selle Italia Speedneedle, Flite
- 9.7mm High x 7mm Wide Oval Rail for Fizik Antares Carbon
- 10.3mm High x 8mm Wide Oval Rail for Fizik Aliante 2 Carbon
Product Reviews (4)
Questions & Answers (3) Q & A
Download File  
Product Reviews (4)
Overall Product Rating 2.5 / 5
Bad design
By Viacheslav
27 May 2019
2 / 5
ConsAll the rest
ProsThe only option to install saddles carbon with carbon rails into some proprietary posts
With this design you have to choose between squeezing your carbon rails too hard and get a well fixed saddle or save the rails, but be no certain if your saddle rotates during a ride.
Recommended torque is 10-12 Nm, while some rails can withstand only 7-8.
Also, it is prone to sticking after being tightened. I.e., if you torqued it to spec, it could be very hard to unstick the clamp and readjust your saddle.
Finally, my 9x7 version cracked after one racing season.
Forward Offset Post Clamp but Difficult to Adjust
By Timothy Takemoto
01 Mar 2019
4 / 5
I recommend this product
Consdifficult to adjust. Requires rail specific clamp
Pros360 swivel for seat post reversal
I like the USE posts because it is possible with this 360 degree swivellable clamp to turn the post around and use the offset pointing forwards for a more Time Trial type position on a road bike.

The fact that there is only one bolt, which is also the axis of swivel means that USE have designed a way for it to be stable while only being tightened in one place. That is to use tapered shoulders that fit into the clamp that lock in place. This means that it is difficult to adjust the angle of the saddle because the clamp locks down so well. I have to remove the saddle to adjust.

The other disadvantage of the one bolt system is that the height of the channel for the saddle rails can't be adjusted, so the clamp can't be used on a variety of saddle rails, but rather one must purchase a clamp for each type of rail with a groove matching the rail dimensions. I have the basic round clamp and wonder whether to buy a 7mm x 9mm clamp for carbon rails on cheap Chinese saddles. I probably will.
annoying that it needs replacing
By Stephen de Souza
06 Oct 2017
1 / 5
I recommend this product
I wish I didn't have a USE seatpost but now that I do, I am not the only one that has had problems with it (google if you don't believe me). So I've had to shell out for a replacement clamp. SJS had the best price I could find but its still annoyingly expensive.
Lasted 3 Years, E-Post Use
By Paul
17 Sep 2016
3 / 5
I recommend this product
Cons7x9 version may be not so durable
ProsAllows saddle options for LOOK e-post
3 years ago I bought the 7x9 version so I could use carbon railed saddles with my LOOK e-post. I used the regular 7mm round USE fitment for several years, no problems, but after 3 years the 7x9 developed a crack.
Questions & Answers (3)
What size clamp for brooks c13 oval carbon rails
04 Mar 2020
Hi, C13 rails are 9x7 so you need part no 36825S9 Thanks 05/03/2020
Sorry but the saddle was fizik arione k1 (with c4 braided rail) What measeures fit!
22 Sep 2017

Unfortunately as we don't have your particular saddle in stock we have no way of knowing what size rails it uses. You'll need to measure the rails to make sure you select the correct size.

What measure for fizik antares braided c4? Thanks
21 Sep 2017

Unfortunately as we have never sold your particular saddle we don't know what size rails it uses. You'll need to measure the rails to make sure you select the correct size.