|Front derailleur clamp size - 32mm or 35mm???||jamie brown|
Jun 10, 2002 2:06 PM
|Replacing my front derailleur on a three year old Serotta Colorado. Anyone know (off the top of your head ) what the clamp size is?
Is it the inside diameter of the clamp that is measured, or the diameter of the seat tube, or what?
|re: Front derailleur clamp size - 32mm or 35mm???||Jekyll|
Jun 10, 2002 2:21 PM
|Measure the OD of the seat tube where the derailleur will sit.|
|Measure the seat tube diameter.||the dad|
Jun 10, 2002 2:22 PM
|That's always safer than taking the word of somebody you don't know.
1 1/8" = 28.6mm
1 1/4" = 31.8mm
1 3/8" = 35.0mm
|Measure the seat tube diameter.||jamie brown|
Jun 10, 2002 3:08 PM
|Excellent - thank you.|
|If you don't have a caliper,||the dad|
Jun 10, 2002 3:13 PM
|take a big crescent wrench and gently close the jaws around the seat tube. It doesn't have to be perfect, we're talking 1/8" here. Then you can measure the distance between the jaws with an ordinary rule.|
|measure circum. then get Diameter||Old_school_nik|
Jun 10, 2002 4:22 PM
|Take some dental floss (or string if you live in England) and wrap it around your seat tube where the old der was mark the length on the string with a pen then stretch out along a ruler and measure it. If you only have Inches times by 2.54 to get metric or 25.4 to get mm
Diameter = Circ ÷ 3.14
there you have it