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I have a 2003 NRS with a 27.2 seatpost and the shim. The problem is that I can't get the damn seatpost to stop slipping, no matter what I do. My post is a carbon 27.2, so I originally didn't torque the bolt down really tight in fear of cracking the post. Well, after the post kept slipping I kept tightening the bolt down more...and more...and more...to the point that it's as tight as I can get it! And the damn post STILL wants to slip.
My buddy had a Specialized that had a shim and he had the exact same problem with a 27.2 Thomson. He ended up ditching both the shim and the 27.2 and put a 30.9 on his Specialized and the slippage problems went away.
Can I run a 30.9 seatpost on the NRS? If so, is there a minimum insertion amount that is required to keep the seat tube from cracking?
Somebody in the past also mentioned a beer can trick - cut a small sliver of beer can, wrap it around the shim (between the seat tube and shim), and then retighten the bolt. I guess that sometimes corrects seatpost slippage problems with shims. But to be honest I *really* hate that stupid shim and would like to get rid of it once and for all if at all possible.
Thx...Doug
My buddy had a Specialized that had a shim and he had the exact same problem with a 27.2 Thomson. He ended up ditching both the shim and the 27.2 and put a 30.9 on his Specialized and the slippage problems went away.
Can I run a 30.9 seatpost on the NRS? If so, is there a minimum insertion amount that is required to keep the seat tube from cracking?
Somebody in the past also mentioned a beer can trick - cut a small sliver of beer can, wrap it around the shim (between the seat tube and shim), and then retighten the bolt. I guess that sometimes corrects seatpost slippage problems with shims. But to be honest I *really* hate that stupid shim and would like to get rid of it once and for all if at all possible.
Thx...Doug