Seat Post Sizes

XTCRider
XTCRider Posts: 113
edited July 2007 in Workshop
Do seat posts have be exact size for seat tube. There is a sticker on my SCR3 that states the internal diameter is 31.7mm. It looks like it is shimmed down but to what i dont know without measuring it.

According to Wiggle

"A seat post needs to fit your frame exactly - within 0.2mm"

Does this mean i can buy a 31.6mm seat tube or should i find out what size it is shimmed to and buy a seat tube with that diameter
http://www.flickr.com/photos/xtcrider/sets/72057594126938720/

I want to ride my bicycle, I want to ride my bike, I want to ride my bicycle, I want to ride it where I like

Comments

  • maddog 2
    maddog 2 Posts: 8,114
    can you measure it?

    if not, drop Giant a line. I'm sure they'll know.

    but yes.... you need to be within 0.1mm for a proper fit. eg. a 27.0 post will not work properly in a frame designed for 27.2mm
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer