|Anyone know size of downtube on mid-80's Trek 1100||cdlynx|
Apr 9, 2003 9:20 AM
|I'm updating my 'winter-ride' to Shimano RSX STI. I don't know the downtube size clamp to replace the front der. Thanks, david|
|you mean the seat tube...||C-40|
Apr 9, 2003 10:59 AM
|Probably 1-1/8" or 28.6mm. But why don't you measure it?
An adjustable wrench makes a great caliper for measurements that don't require a lot of accuracy. Just adjust it to fit the tube and measure the opening with a ruler.
Another method is to measure the circumferance with a piece of tape or paper and divide by 3.14. A 1-1/8" tube will have a circumference of about 3-1/2" and a 1-1/4" (31.8mm)tube will be 3.92 inches.
|re: Anyone know size of seat tube on mid-80's Trek 1100||cdlynx|
Apr 9, 2003 12:13 PM
|DOH! meant seat tube.|| |