Silly seatclamp question

Just bought a dropper post so i need a bolt-on seat clamp to stop it going walkabout, inner diameter is 30.9, what size clamp do i need? 😳

take it 30.9 in the dropper diameter?

depends on you frame for the seat clamp size , alloy tube with be thicker than steel for example.

Might be an idea to mention what bike you have

Si

What size front mech clamp do you have? Its the same as that, most likely 34.9 on an ally frame

What size front mech clamp do you have? Its the same as that, most likely 34.9 on an ally frame

unless the seat tube is externally butted near the seat clamp…..

Probably 34.9.

Ooops! Its a Marin Wolf Ridge 6.8 2009 model 😳

Just googled the bike and haven’t found anyhting about the external seat tube diameter. The seatpost diameter is 30.9, not the internal seat tube diameter.

muddydwarf – Member
The seatpost diameter is 30.9, not the internal seat tube diameter.

If they’re not the same, you have a problem 🙂

Well yeah, but the internal seatube diameter isn’t going to be exactly 30.9mm is it? I work in engineering manufacturing and i know enough that 30.9 won’t go into 30.9! 😛

Actually, i wonder what the tolerance is…

well surely if you work in engineering you have access to a vernier caliper ? 😯

I do, but its at work and i’m at home with an internet connection and a credit card! 😆

Linky

Sorted Scotsman – ta for that, although i am a bit worried about how easily you found that thread… Do you have powers of total recall??? 😯

Google search (Marin Wolfridge seat clamp diameter) and up pops STW top of the page! But I am at work sitting in a hotel in deepest darkest West Africa (Nigeria) with nothing better to do!