Noobie needs help measuring my seat post clamp

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5/1/2013 8:14 PM

Im fixing up a old bike I was given and when I ordered a new seat post clamp I ordered too big.After talking to the seller, searching google, and talking to my local bike shop (deals with road bikes, not BMX) Ive been unable to find an answer.

So do I loosen the clamp and measure from the inside with calipers? or the outside?

The silver is the old one, the red one was listed as 34.9mm on ebay and is way to big

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Ive got a 2005 Specialized Fuse IV with a 33.71mm outside diameter

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5/1/2013 8:21 PM

I thought it was . 25.4mm with it measured while tightened
But if im wrong I would buy one that is 33mm

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Refs:tomdon x4,Xxohioanxx,BigCurn, Don't remember the rest

5/1/2013 8:39 PM

Well that's what Im asking.Are they sold based on what the measure once tightened from the outside diameter?or loose from the inside diameter?

Because then your right a 33mm sounds good
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5/1/2013 9:02 PM

Go buy a 25.4 one? The silver one should woek.
Just tighten the f*ck outta it and that should work

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5/1/2013 9:11 PM

Brayden_Buckingham wrote:

Go buy a 25.4 one? The silver one should woek.
Just tighten the f*ck outta it and that should work

The silver one is the stock one Im replacing which fits just fine.The red one is the replacement that is a little too big.

why should I buy a 25.4mm one? that's way to small.I need a 33mm one.BUt I cant find one for sale

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5/1/2013 9:15 PM

specialized is weird and uses a larger diameter seat post

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I'm on the vital legit list!

5/1/2013 9:17 PM

Logos wrote:

The silver one is the stock one Im replacing which fits just fine.The red one is the replacement that is a little too big.

why should I buy a 25.4mm one? that's way to small.I need a 33mm one.BUt I cant find one for sale

You could probably find one on that oldschool forum I think its called bmxmuseum.com

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