Bike Forums > What FD clamp size do I need on my cross bike?
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 Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

 07-12-10, 12:51 PM #1 4Rings6Stars Seņor Member Thread Starter     Join Date: Jul 2009 Location: Boston Bikes: Lots of em. Posts: 1,698 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) What FD clamp size do I need on my cross bike? I'm trying to figure out what size FD clamp I need for my Raleigh Team Cross. I have no idea what year it is as it isn't shown in the Raleigh catalogs (The 2005 catalog shows the Team Cross but in different colors/decals). Any ideas? Or advice on how to measure... Here is the bike for reference (again). I've since added a road triple and new Tiagra 9x3 shifters and new bar tape.
 07-12-10, 01:46 PM #2 flargle Senior Member   Join Date: Jul 2007 Bikes: Posts: 2,119 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 2 Post(s) Measure the diameter of the seat tube at the place where the front derailleur will attach.
 07-12-10, 03:31 PM #3 pretzelface Cat 4 roadkill   Join Date: Jan 2009 Location: Austin, TX Bikes: Posts: 190 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) If you have a measuring caliper, use that to measure the diameter directly. Sizing is metric, so if your caliper is English-only, just remember there are 25.4 mm in an inch (exact conversion). If you have a flexible measuring tape, you can measure the circumference and divide by pi (3.14159 blah blah blah) to get the diameter. If you don't have a flexible measuring tape, you can take a string, wrap it around, then hold it up against a ruler or rigid measuring tape. Your calculated measurement will probably be a little off, of course, but there are only so many sizes they make - just round it.
 07-12-10, 06:52 PM #4 4Rings6Stars Seņor Member Thread Starter     Join Date: Jul 2009 Location: Boston Bikes: Lots of em. Posts: 1,698 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 3 Post(s) Thanks guys. I don't have a caliper, but with a string and measuring tape I got a circumference of 101mm / pi = 32.15. Close enough to 31.8 I assume? Thanks again. I'm almost ready to climb some hills with this thing! I'll post pics when it is "complete".