I'm trying to build up a cross bike but Wifey's not digging the idea. So I'm attempting to be creative and re-use my old steel mountain bike frame. Question is this: Are there cantilever brakes that will reach from the brake bosses on a mountain bike frame to the rim of a 700c wheel? My idea is to get all parts outside of the frame this season and hopefully get a frame in the winter sometime. I want to be able to move everything (except these brakes if they exist) over to a new frame when the time comes.
So, do they exist?
Edit: Dammit. Screwed up the thread title. Sorry 'bout that.
12 Y.O. Litespeed MTB, IRO Jamie Roy fixie, Custom Habanero Ti 'Cross, No name SS MTB, Old school lugged steel track bike (soon)
Not much help, but I pass a guy on my way to work this morning riding a Bontrager OR MTB frame that was converted for cross duty with 700C wheels and drop bars. He had an aluminum arch on the front fork and rear stay that bolted to the cantilever post bosses, and looped over the tire (imagine a suspension fork arch bolted to your frame). Another pair of canti pivots were mounted to the arch, higher up to accomodade the larger 700 C rim. These arches looked like a commercial product-although it would be easy to make some too-just get some 1/4" aluminum plate and cut them out. I didn't get a chance to ask him where he got them. If I see him again I'll stop him and ask.
Here I am to save the day! (from mighty nouse) I have actually done this to my old Trek 3 tube carbon mtn bike. The way I did it is very inexpensive. I took a piece of aluminum probably about 1/8 inch thick, and about 1/2 inch wide. I cut it into the proper lengths and drilled holes. I mounted it to the brake arms like I would the brake pads and the mounted the brake pads on the aluminum. It may not make sense but I will take a picture of it and post it so that you can see. It works great and I don't need any travel agent with my old Campy ergolevers. By the way if the metal scrap yard charges you for the metal it would be less than a dollar, and then you have the cost of the screws and nuts and washers, less than a dollar or two.
The biggest issue is that it will take a few rides to get use to the handling of the bike. However my bike works great. I even have road tires on it right now as I just broke my road bike frame and I am waiting for my new bike to come in. Roadies give me a stange look when they see me riding with them on the road with a front suspension fork (Keep in mind that I am a roadie too) I love taking my bike on forest roads.
I should be able to get you some good pics for you later today.
I don't remember what kind of brakes they are. I will look when I get home. I don't remember why I changed to these brakes but I did it a long time ago. There isn't the ability to have the brakes very far from the rims, but once I got them adjusted correct they give me great stopping power even with the road bar brakes (ergo levers). I know that the brakes would have been very cheap ones such as low end Avid.
I've got my LBS looking for the Mavic adapters. Just mentioned them earlier in the week, so it may take a bit. Guy there is usually good at finding obscure stuff. I'm also going to try to email Mavic and see how they distribute them (QBC, Diamondback, etc.).
Well, I've got a set on the way. It may be a while before I get them on the bike, as I'm also getting a wheelset rebuilt for it and I'm not in a huge hurry at this point. Shop didn't tell me what retail was, but he just called Mavic and they sent them out. I'd imagine your shops can do the same thing. When I get them on, I'll try to get pics up.
Got the adapters yesterday. Retail is about $30 each. It's good to have a good LBS, though, so I ended up paying a bit less. At any rate, my wheels are waiting longer nipples before they can be rebuilt, but I'll probably get the adapters on the bike this weekend. I'll eventually post pics when I've got wheels, etc. on the bike.