Cane Creek Seatpost Adapter Shim

This Cane Creek shim is a quality piece that fit perfectly snug as advertised on both outside 31.8mm diameter to fit inside of the seat tube & also the inside to accommodate a smaller 27.2mm diameter (road) carbon post that I installed in place of the (MTB off road ) sized alloy post it replaced without any negative issues or damage whatsoever! The Easton carbon post I installed along with a carbon railed Fizik Antares seat transformed a harsh riding MTB geometry based commuter bicycle into a significantly lighter post & seat combo in addition too a much smoother & more comfortable riding bicycle that I use on the road, had considered installing a brand named Suspension seat post but the cost,weight penalties, inconvenience & fickled nature was an issue for me the bicycle itself was already heavy in comparison? I couldn’t be happier with the results, it exceeded my expectations & highly recommend this Cane Creek shim if you’re planning a change of seat posts size. PS: if your bicycle has a slotted seat post frame DO NOT align it with the slot on the Cane Creek shim, I positioned mine opposite 90 degrees ( imperative!) to prevent a pressure crack when installing a carbon post or even marring an alloy post once torqued no more than recommended standards, go a Nm or even two less if your light, if you hear or feel any movement you can always tighten that Nm up if needed, if you need more than recommended values chances are that there’s another issue use caution & a good accurate torque wrench when dealing with Carbon?

For all the seat post sizes out there, shims can become very essential for riders that manage a number of cycles. Going to an e-bike, I used this to move a favorite seatpost / saddle to an e-bike of a larger frame size. This fit precisely, is well machined, light enough, and allowed me to use a much more comfortable seatpost.and saddle. Given that most posts synch at the top end of the seat tube, this provides good grip and has a well engineered lip to prevent it from slipping inside a normal undamaged tube.

This is 100% aluminum unlike other cheaper options that claim aluminum but turn out to be plastic. Also, having a shim that’s 100mm vs shorter I feel is a better option.

I bought both the 27.2 to 31.4 and 27.2 to 31.6. I thought I needed the smaller one because my seat tube is a bit ovalized at the seatpost clamp area--but it was a bit too small to allow clamping with proper force. The 31.6 diameter worked perfectly. This is no reflection on the Cane Creek shim. For such a simple item, this is beautifully made: smooth on both sides; a pronounced lip on the top to it can't slip down into the seat post. A 3mm wide slit to allow compression around your seatpost, a 2.5mm wide groove opposite the slit to also allow some compression. It is quite long so it provides some grip for more than just the clamping area. I was using a carbon fiber seatpost so I used motorex non-abrasive carbon paste to prevent slipping. Didn't quite work with the 31.4; worked as expected with the proper 31.6 shim. Great solution.

Work wells

It’s a shim. It’s sturdy and does what it’s supposed to do.

Excellent Quality. No plastic crap here.

Purchased to adapt my old specialized rockhopper to a modern seatpost size. Fit perfectly, doesn't let the seatpost slip. An awesome cane creek product as usual!

early delivery and product as described.. recommended seller.

usually such products are about being 'perfectly shaped' perfectly circular with good fits - and it does all of that keeping in with the brand quality and name - I notice no difference between seat post installed with this shim or one without - 5 stars

Mein Mann war sehr zufrieden. Für seinen Zweck total passend

As described

Es un gran producto lo recomiendo ampliamente lo instalé y me funcionó perfectamente saludos