I ride a 1975 French Motobecane, and I think it's time to replace the aging cantilever brake set with new caliper brakes.
Here's the problem: My front brake bolt is 2" long, and my rear brake bolt is 1 3/4" long, and I need all of that length to attach the brakes to the bike. It's my understanding that new Tektro brakes come with a standard bolt length that is shorter - because I recently had a pair of new Tektros in my hands and held them up to my frame.
Can I special order a longer bolt (the tapered kind that the Tektro brakes use) anywhere?
If not... I think I could (gulp) possibly widen the holes in my bike's frame to accommodate these shorter, wider bolts, but I'm kind of afraid to do that.
Has anyone out there gone through the process of getting and old bike outfitted with new brakes, and can you help me out?
-Kris
My advice would be to take a trip to a bolt supplier, and see what they can find. Or drop into a hardware store.
(actually, whack pictures of the bolts up, I'm not 100% sure what they look like)
I understand what your saying.
The front "bolt" needs to be that long to go through the fork crown but where does the back fit?
Modern fitting calipers generally use an Allen nut which sinks into the fork or rear fitting position.
You can get extended Allen nuts where a longer fitting is required.
See SJS website for examples and ideas:-
http://www.sjscycles.co.uk/page/find/?name=brake%20nuts&page=1
The other thing to be aware of is the brake "drop". (that is the distance from the fixing hole to the rim of wheel.) as there are various sizes.
Nut fitting calipers are still available as shown on the web-page.
If you want to fix an Allen nut version then you can usually drill out the rear part of the fixing hole.
The hole has to be just big enough to take the nut "shaft" but not big enough to let the "shoulder" through.!!
If in doubt then I would suggest you consult your local bike shop or an experienced cyclist friend.
Ride hard or ride home alone!
Ok, everyone, thanks for helping out. As it turns out, all I need are the nutted version of the same brakes, or to drill out the frame to make room for the recessed nut (which is the new plan).
To anyone who read this thread to whom this seemed like an obvious solution, I'm sorry for wasting your time. It's my first time overhauling an old bike, and it has been a pretty steep learning curve for me. (Once this job is done, I'm going to feel like an expert!)
Good ol' Sheldon Brown came to my rescue, as did someone at Harris Cyclery, who kindly explained to me that the nutted versions of brakes that they sell have a longer bolt. He didn't even call me an idiot for not knowing!
If anyone has a link to good instructions or strategies for drilling my frame to make room for the recessed brake nuts, I would be much obliged.
First question to answer, is what reach do you need? No point in looking at brakes until you know the reach required for your bike.
The R559 55-73mm reach and R536 47-57mm reach are both available nutted; both through Amazon and other sources.
Nigel
I just posted a question regarding the you tube video out there for converting the recessed nut tektro stud with a nutted one from the companies lower end side pulls. I did this on a set of tektro quartz sidepulls I wanted to install on a vintage Ross (Ishawata 024)road frame. Apparently several of Tektros lower end brake studs are exact diameter and recessed head to the top end. Requires disassembling the brakes but the time spent was well worth it.
(The lower end were mentioned in the video..I ordered them by their model and the only id they have on em is 800A stamped in the back of the arms)
Thanks to Tektro USA I can pass on the fact that Tektro now offers a retro conversion kit (stud, and hardware) top convert their top line sidepulls to nutted versions. $19.95
While I have the floor.
Loose Screws has re-opened under new management.
This was (and again IS) the place to go for those odd (french thread whitworth thread)bits and pieces for your vintage bike
They now have a facebook page and a blog and no minimum order.