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KCNC SC13 Twin Seat Post Clamp

Customer Reviews (2)
3 / 5| Write your review
£24.99
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Sizes / Colour
£24.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
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Details
Product Reviews (2)
Questions & Answers (3) Q & A
Details
KCNC's Twin Clamp is designed to solve the annoying slipping seat post! It does happen - and this clamp is designed to prevent posts slipping down inside the frame by having 2 clamps joined together - one clamps the seat tube as normal but the top clamp grips the seat post itself to provide an extra clamping force without over stressing the seat tube clamp or the seat tube and seat post itself!

Comes in 4 combinations of seat tube / seat post sizes;
- 30.7-27.2mm (23g)
- 31.8-27.2mm (25g)
- 34.9-30.9mm (27g)
- 34.9-31.6mm (28g)

- CNC machined with two Ti bolts make it light
- Machined from 7075-T6 AL alloy
- Twin titanium bolts, gold nut bars
Specification
Downloads
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Product Reviews (2)
Overall Product Rating 3 / 5
Good clamp with swiss cheese bolts
By
13 Jun 2018
1 / 5
The clamps works well. I needed a 27.2/31.6. Unfortunately the head of one bolt snapped off at installation despite using a torque wrench.

The second, larger bolt rounded off and had to be drilled out.

The bolts have a strangely narrow head which site in a circular hole so its not easy to find steel replacements.

If you can find steel bolts that will fit this clamp works exceedinglu well. But good luck with that.
Solved my slipping seat post problem
By
26 May 2018
5 / 5
I recommend this product
I couldn't stop the carbon seatpost on my new TI Boardman from slipping down until I bought this clamp.
Bought the black to match the original design, and torqued it up to 4Nm on the top and 6 Nm on the bottom.
Problem solved. If I lost a couple of stones in weight, I might be able to go back to the original Boardman clamp.
Questions & Answers (3)
Can you tell me the height of this clamp please?
By
09 Apr 2018
Hi there,

The height is 24mm

Thanks
Seatpost clamp
By
16 Nov 2017
Hi guys, which side double seat post clamp would i need? My stump jumper has a 30.9 dia now... I'm not sure which diameter this refers to and i don't have a set of verniers to hand.

Cheers
Hi,

That would be your actually seatpost diameter, so it is likely that the 34.9 & 30.9mm size should be the correct one, however we have no way of knowing the frame size specification of your Specialized frame to be able to say for definite if it will fit or not.

Thanks.
My bike has a 31.8 seat clamp but slips.
By
29 Aug 2017
It is the correct size. I now want to try a twin bolt KNC seat clamp but am not sure what size as you offer four options. My guess is 34.9-31.6?
Hello,

The measurements would be the diameter of the seat tube and the diameter of the seat post.

Thanks.