Bike Forums - View Single Post - Longer seat post and risers for a slightly too small frame? any problems with this.

02-03-12 | 06:12 PM

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Zeusmeatball

Joined: Jun 2009

Posts: 259

Likes: 1

From: CT

Bikes: 1976 Motobecane Nomade Sprint, 1988 Specialized Rockhopper comp, 1991 Schwinn Crisscross, 2009 K2 Zed 3.2, 2011 Trek X-Caliber Gary Fisher collection

Quote:

Originally Posted by Bill Kapaun

There's about a dozen (or more?) different seat post diameters in .2MM (.008") increments!
You MUST get the proper diameter!!!!!

Rock Hoppers seat posts varied from year to year, so you can't assume they have a generic size for that model.
You MIGHT be able to find the proper diameter on bikepedia.com

I installed a 400MM post on my bike last summer for the same reason as you.
I found a NEW one for $30 on the net and the bike shop matched the price.

Measured with a Digital Caliper

26.8 is what the seat post that is in there right now is and I have been riding on it and it hasn't moved yet (and I am a clyde) so I gotta assume its the correct diameter for the frame.

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