Seatpost clamp Home › Forum › Bike Forum › Seatpost clamp Viewing 3 posts - 1 through 3 (of 3 total) Seatpost clamp simondbarnesMember You definitely don’t want a 31.8mm. I don’t know if a 34.9 would be correct for your frame though. Posted 9 months ago chaosSubscriber Should be able to find out in the manual. https://www.scott-sports.com/gb/en/support/manuals Posted 9 months ago recklessbikerMember Hi there. I need a new seatpost clamp for my Scott Scale bike, which has a seat tube with a diameter of 31.6mm. Would I be best off with a clamp with an internal diameter of 31.8mm, or 34.9mm? Cheers all. Posted 9 months ago Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic.