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forum
Is it a bad idea to use a shim for my seatpost?
I'm keen to change my aluminium post for a carbon one but I'm struggling to find one I like/can afford in 30.9.
I've seen plenty in 27.2 and have a reducer shim from my mtb. Would this be a daft idea with a carbon post, especially considering I'm 115kg?
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
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- KDee 1 sec ago
"Strumpjumper"...sounds like a euphemism for something else 🤔
- andystow 16 min 46 sec ago
The new RH tubes claim to solve that issue, but price and availability is a problem. I tried to get some to try out, but they went out of stock on...
- henryb 29 min 1 sec ago
Disappointed this article doesn't use the words 'boondoggle', 'junket' or 'jamboree'
- brooksby 41 min 6 sec ago
Cough - cough - Clevedon seafront! - cough cough
- eburtthebike 58 min 57 sec ago
Thanks for the tip. I didn't realise the Forest of Dean was inside the M25.
- Adam Sutton 1 hour 3 min ago
Chances are you live in London or somehwere where you have decent public transport, to make such a dumb comment
- Secret_squirrel 4 hours 11 min ago
Those calipers arent the prettiest. Makes them look like Post-mount.
- Dnnnnnn 4 hours 54 min ago
I'm all for a much more socialist approach to the sorts of things you mention, where there are clear market failures and a need for decent...
- David9694 4 hours 54 min ago
Zorbing balls - if it saves just one life
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3 comments
Thanks chaps. That was my train of thought, and why I'd never dream of doing it with my MTB. Having searched around, I've also found a few posts (including the FSA) for around £50 in a 30.9, so all good.
I just need to find a matching stem and bars, 'cos I'm a tart!
as a fairly heavy rider too, who's broken more than one frame at the seat tube/top junction i'd tend to agree with shaun. by adding the shim you're decreasing the area over which the forces are dissipated through that critical junction (unless you can find a really long shim). so it's more likely to break.
you can get cheap carbon posts in 30.9 though... this one http://tinyurl.com/cqpgn8
is only 30 quid and you can get decent FSA and Kore ones for around 50 notes
I would shy away from this practice. Most budget "Carbon" models are pretty hardy in my experience but given your size and weight it would be very, very painful were one to fail and you'd void the warrantee into the bargain.