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Seatpost clamp question...(2 posts)

Seatpost clamp question...rattled
Jun 22, 2001 7:37 PM
Hey guys ... I was on the commute home from the shop this afternoon and *snap* my seat dropped and whaddaya know- broken seatpost clamp ...

I have a 27.0 post, and I am thinking I will replace the piece of junk OEM clamp with a Salsa Liplock .... thing is, even if I take the bike to work tomorrow and mic the seat tube, the liplocks come in only 28.6, 30.0, 32.0 or 35.0mm diameters ... I am willing to bet it is a 30.0, but was wondering if anyone has any suggestions- It is definitely not going to be a "perfect" fit...

So what is the range I can use?


the diameter is the seat tube, not seatpost..C-40
Jun 22, 2001 7:50 PM
The diameter you need to know is the seat tube outside diameter. If it's a steel bike, it's usually 28.6mm or 1-1/8". Aluminum frames could be one of the larger sizes. If don't have access to calipers or a micrometer, try using a crescent wrench as a crude caliper to measure the seat tube. You should be able to tell the difference bewteen 1-1/8", 1-3/16", 1-1/4" and 1-3/8", even with this crude device. As you've noted, the seat tube size may not be exact (nothing is, if measure accurately enough), but it should be very close to one of these standard sizes.