Daytrip
12-25-08, 11:03 AM
Can a brazed FD be adapted to fit to frame not designed to accommodate a brazed derailer? If so, is it just a clamp-on adapter?
Bicycle Mechanics - Brazed FD adapter?
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dvs cycles
12-25-08, 11:08 AM
http://www.excelsports.com/new.asp?page=8&description=Front+Derailleur+Clamp+Adaptor&vendorCode=PS&major=1&minor=33
http://www.excelsports.com/new.asp?page=8&description=Front+Derailleur+Clamp+Adapter&vendorCode=SHIM&major=1&minor=33
http://www.excelsports.com/new.asp?page=8&description=Red+Front+Derailleur+Adapter&vendorCode=SRAM&major=1&minor=33
http://www.excelsports.com/new.asp?page=8&description=Front+Derailleur+Clamp+Adapter&vendorCode=SHIM&major=1&minor=33
http://www.excelsports.com/new.asp?page=8&description=Red+Front+Derailleur+Adapter&vendorCode=SRAM&major=1&minor=33
J.P.
12-25-08, 12:41 PM
Shimano makes a clamp-on adapter that allows their brazed FD to be mounted on a frame not designed to accommodate a brazed derailer. I don't know about other brands of FD.
Daytrip
12-25-08, 01:22 PM
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
Retro Grouch
12-25-08, 01:42 PM
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
One measurement is worth 1,000 guesses.
Wrap a piece of paper around the seat tube. Mark where it overlaps. Measure that distance in millimeters. Divide by 3.14. That's your answer.
One measurement is worth 1,000 guesses.
Wrap a piece of paper around the seat tube. Mark where it overlaps. Measure that distance in millimeters. Divide by 3.14. That's your answer.
oldride
12-25-08, 02:50 PM
Thanks. I'm going to be putting a Shimano 105 brazed FD on a Trek 1.2 frame. Does anybody know offhand what size tube that is?
You could use an adjustable wrench (crescent) and open it to slide over the tube then tighten until it touches. Remove and measure the distance of the opening.
Here is a 9sp 105 FD brazed on, clamp on, double or triple, cheap!
http://store.icyclesusa.com/shared/StoreFront/default.asp?Target=products.asp&ProductID=103
You could use an adjustable wrench (crescent) and open it to slide over the tube then tighten until it touches. Remove and measure the distance of the opening.
Here is a 9sp 105 FD brazed on, clamp on, double or triple, cheap!
http://store.icyclesusa.com/shared/StoreFront/default.asp?Target=products.asp&ProductID=103
HillRider
12-25-08, 03:09 PM
Shimano makes a clamp-on adapter that allows their brazed FD to be mounted on a frame not designed to accommodate a brazed derailer. I don't know about other brands of FD.
Campy does too.
Campy does too.
ginsoakedboy
12-25-08, 06:27 PM
Here's one for 28.6 that Velo Orange sells:
http://www.velo-orange.com/decl28.html
http://www.velo-orange.com/decl28.html
Deanster04
12-25-08, 10:08 PM
Take it to your local good LBS and have them Mic the tube or pull out the seat post until you can read the diameter of the seat post. Most are scribed. I have been using the adaptors for years since I buy and sell frames over the years that have different ST diameters. Adaptors are much cheaper than the derailluers. Good luck.
HillRider
12-26-08, 08:14 AM
For the vast majority of bikes, the seat tube OD is one of three sizes: 1-1/8" (28.6 mm), 1-1/4" (31.8 mm) or 1-3/8" (34.9 aka 35 mm). Even eyeballing a ruler should tell you which you have.
If there was an old clamp-on fd, look inside the clamp as the diameter is usually engraved there.
If there was an old clamp-on fd, look inside the clamp as the diameter is usually engraved there.