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Cannondale Rize Seatpost diameter??

10K views 5 replies 4 participants last post by  broom broom 
#1 ·
Hi,

I have recently bought a second hand Cannondale Rize 2009 frame, I think its the four (aluminium version).

I have checked all over the internet and found that the seatpost size should be 31.6 with a 34.9 clamp.

I bought a seatpost in that size and its too wide, I can slide it in a little but it's definitely too snug. I tried my 30.9 thomson and its fine. My issue is, when you look at the slot behind the seatube (just underneath the clamp) there is a tiny bit of space around the seatpost when its inside the seatube... Is this normal?

It does seem like 30.9 is the right size but just wanted to check if anyone else knew.

Thanks
 
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