Rapunzel Posted November 25, 2011 Posted November 25, 2011 I'm considering using a shim to fit a 27.2 seatpost on my carbon hardtail which requires a 30.9 diameter seatpost. Anybody tried using a shim? What are the pro's and cons?
Thug Posted November 25, 2011 Posted November 25, 2011 Don't see any reason why it shouldn't work and do its job effectively. I use a portion of a RedBull can as a shim between my Thomson seatpost and the seattube as there is a millimetre of play.
CAAD4 Posted November 25, 2011 Posted November 25, 2011 Good luck in finding your size. I eventually found the size I was looking for(27.2 to 31.6) online locally, for almost the price of a new seat post. Bought a new seat post and sold the old one instead. CRC has a nice selection of alu and plastic shims for around R80 if you don't come right locally.
nickc Posted November 25, 2011 Posted November 25, 2011 Also using a shim 27.2 to 31.6, I got a nice one from CRC as caad4 says for about R80. I did find however the Carbon Seat Post tended to slide down in the shim more than when using my other seatpost without a shim. Some baby powder sorted that out. Oh and it now smells like a new born baby.
Guest Omega Man Posted November 25, 2011 Posted November 25, 2011 (edited) I ran a shim on one of my bikes but only cos it was a weird diameter. 30.2. yours is a std size so i would deff not run a shim. That's just my opinion but why run a "fix" when you can just get a seatpost that fits perfectly? Edited November 25, 2011 by Omega Man
Rapunzel Posted November 25, 2011 Author Posted November 25, 2011 Thanks so much guys - the reason for the size discrepancy is I'm considering buying a 2nd hand kcnc ti-pro. So I can go for the red bull with wings option or get the CRC shim and use baby powder if it slips. I think I'm sorted :-)
E1A104 Posted November 25, 2011 Posted November 25, 2011 Also using a shim 27.2 to 31.6, I got a nice one from CRC as caad4 says for about R80. I did find however the Carbon Seat Post tended to slide down in the shim more than when using my other seatpost without a shim. Some baby powder sorted that out. Oh and it now smells like a new born baby. off post but new born babies do not smell great...and not anything like baby powder either!
nickc Posted November 25, 2011 Posted November 25, 2011 off post but new born babies do not smell great...and not anything like baby powder either! The brown stuff that my bike sometimes gets covered with luckily does not smell like the brown stuff that babies sometimes get covered with, also just sprays of with a hosepipe.
TNT1 Posted November 25, 2011 Posted November 25, 2011 The brown stuff that my bike sometimes gets covered with luckily does not smell like the brown stuff that babies sometimes get covered with, also just sprays of with a hosepipe. Some of the downhill riders on this forum reckon you can use the hose on the babies as well...
nickc Posted November 25, 2011 Posted November 25, 2011 Some of the downhill riders on this forum reckon you can use the hose on the babies as well... I used to untill Social Services got involved - something about it being -2 in the middle of July - not quite sure. I think as long as it is summer it is okay, the babies seem to enjoy it if its warm.
Guest Omega Man Posted November 25, 2011 Posted November 25, 2011 Some of the downhill riders on this forum reckon you can use the hose on the babies as well...Wait! You mean to say you can't?
Johan Bornman Posted November 25, 2011 Posted November 25, 2011 I'm considering using a shim to fit a 27.2 seatpost on my carbon hardtail which requires a 30.9 diameter seatpost. Anybody tried using a shim? What are the pro's and cons? A 27.2mm seatpost isn't a good idea on a moutain bike. Especially if it has a sloping top tube and hence long seatpost. It just isn't stiff enough. Rather get the real McCoy. 27.2 should really just be used on road bikes.
Johan Bornman Posted November 25, 2011 Posted November 25, 2011 I used to untill Social Services got involved - something about it being -2 in the middle of July - not quite sure. I think as long as it is summer it is okay, the babies seem to enjoy it if its warm. I had a similar problem once. Someone caught me washing a baby by holding it by its ears and swinging it back and forth through the water. They put up a terrible fuss and never allowed me to get my side of the story in. That water was so bloody hot I'd have burnt my hands if I held the baby like they showed me.
Konaman Posted November 25, 2011 Posted November 25, 2011 You will have to tighten it more than usual to get a proper tight fit, and this may damage your frame/seatpost if you are not careful. I would get the correct size to prevent it from sliding down.
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