Jtek Eccentric Front Mech Shim 28.6 to 34.9

£14.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Designed for fitting a 34.9mm front mech on a 28.6mm frame allowing adjustment outside of the mech's normal range front to back and/or in and out, ie moving the effective range of the cage nearer the frame or further out.

Made from plastic flexible enough to open to 29mm and snap around the down tube.
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Questions & Answers (3) Q & A
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That's the way to do it!
By M. J. Roberts
25 Sep 2020
5 / 5
I recommend this product
Agree with other reviewers, not cheap, but a bit specialised. Not for the first time, when looking to get something working just as I wanted, checked out SKS and found just the right product.
A problem solving miracle.
By T
09 Sep 2017
5 / 5
I recommend this product
ProsSolves a problem.
This is not the first time I've had difficulty getting a front mech to work flawlessly... This time its on my wife's
By K
15 Aug 2017
5 / 5
I recommend this product
ConsEXPENSIVE for formed plastic
ProsDoes the job
Great piece of kit in that it not only acts as a spacer for fitting many front derailleurs to 28.6 mm seat tubes but more importantly allows the front derailleur to operate closer to the seat tube. This is good when using some MTB mechs with closely fitted tripple chainsets where dropping the chain onto the inner chain ring is an issue.
Questions & Answers (3)
23 Mar 2019
What is the height and min and max width/thickness of this spacer?
Hi, the height is 16 mm, the wall thickness is 1 mm on one side and 5.3 mm the other. Thanks 26/03/2019
Sora front mech vs. Deore chainset
21 Sep 2018
Will this enable me to use front mech designed for a 45mm chainline (like the FD-R3030) with a chainset with a 50mm chainline (like FC-M591)? Thanks a bunch in advance!
Possibly, we could really only tell by test fitting the set up!

My Mech Is A Campagnolo Record 35 Mm Band On Will This Be Ok?
19 Feb 2016

If you're trying to fit your front derailleur to a frame that is 28.6mm in diameter then this should be fine for your needs.