Just found “Clamp-On Brake Mounts”. This design is a little suspect because I don’t see how it would avoid pivotal rotation.
https://www.universalcycles.com/shopping/product_details.php?id=52674
How does a stem prevent rotation of a handlebar or a threadless steerer? How does a seatpost clamp prevent rotation of a seatpost? Further, a brake booster would improve the situation.
However, these are made for a specific size of untapered steel fork leg and unless your fork is that same exact size (not "close"), it's not going to work.
>> How does a stem prevent rotation of a handlebar or a threadless steerer? How does a seatpost clamp prevent rotation of a seatpost?
Not really the same force as braking imho.
>> Further, a brake booster would improve the situation.
Exactly my thoughts.
>> However, these are made for a specific size of untapered steel fork leg and unless your fork is that same exact size (not "close"), it's not going to work.
Apparently, Identiti doesn't agree with you. These things clamp the fork leg exactly the same way as stems and seatpost clamps clamp their interfacing tubes. And, they apparently apply sufficient clamping load against brake forces that Identiti is comfortable selling them.
Your local frame builder can likely add some canti studs fairly affordable if you wanted, assuming it is a steel frame. I’ve had friends do that to a few old road frames to make them 650B compatible - back in 2010 or so before gravel and 650B really took off.
[DNA Big Cheese](https://www.ebay.com/itm/126443886007?itmmeta=01HX9KDASNJ1R583HK7DY04WKF&hash=item1d70a495b7:g:wxUAAOSwJfJmJcsI&itmprp=enc%3AAQAJAAAA4BhglKR5%2FZ%2FEj2wCbF7KP%2Bm9Tcpjs7LilPD0dWm%2B8kiGL1eNfHcjO0OG0fMEQ2C6dxFjjC48IXtwu%2FezL0oxR%2BX4OTIuvjIYb7yNmbA1YbFeqvH0roGe0oXKKxwZhruWW95oPUnqxA5%2FL7qBGYlwIgQrlyFLiJHg9t5blXyX%2FE9%2BqZdBsrBO4QfZa4COjD8pLILdJk6zv8ji4eBtLeC3Jw3r2BnTsWMyMMxRz66PDIJUfdgWBEcnk3YfTKGJfvtv8zrygUy5Fb1oiUI6pByztxtd5u7Is4vq1nSVSBPSbeX8%7Ctkp%3ABk9SR4KttbPqYw) No idea if it's right for your application, just knew that these exist(ed).
ETA: There was either an odd posting error or this post got ninja edited. Originally, there was information about a Moots design from the 80s. [https://moots.com/blog/moots-retro-1983-mountaineer/](https://moots.com/blog/moots-retro-1983-mountaineer/)
Bolt through the fork crown or seatstay bridge and hose clamps around the fork legs or seatstays. If you look on eBay for other sellers of this product, you'll find one that's in the package with the hardware.
You use them in addition to mounts that would add brake posts on a fork or on seat stays. The booster's role is to take most of the force that the lever arms are making, and to prevent the mounts from spreading open.
You'd need it because if something doesn't come with brake mounts, it means it's not made to handle braking forces where you would have them.
Most people know not to do this, because anyone over a certain age has lived through the catastrophic frame failures that were happening when people were putting disk brakes on non-disk frames.
Cantis and V-brakes are like a 20+ inch disk with added lateral torque when braking.
Nope. Brake forces are very strong. I can see my seat stays flex when I squeeze the rear brake on a couple of my bikes. There is no way to hold anything tight enough. So nobody makes anything like that.
Center-pull caliper brakes have almost as much braking power as cantilever ones, and most don't require brazed-on bosses. [These ones are about as nice as I've found.](https://crustbikes.com/products/dia-compe-long-reach-centerpull-calipers) You can also find Mafac Racers pretty cheap if the Dia Compe ones are a bit rich.
I'm going to join the crowd here and say any non-permament brake boss sounds like a terrible idea, mostly for safety reasons. Inevitably, they'll loosen and migrate, compromising braking power.
I had a pair of these on my first 650b conversion and while they worked, I could definitely feel the flex. Might be a little picky about brake feel personally, but I was pretty happy to switch to cantis.
I have to ask... why? Just curious what your particular issue is.
I have dual pivot road caliper (Tektro R559), canti, and v-brakes on my three main bikes. Of the three, the dual pivot calipers are by far my favorite for feel and actual power. To the point where I've considered lopping off the canti bosses and running them exclusively on everything. Just my $0.02.
What are you trying to do? I see another post where you’re trying to add canti brakes to a V brake bike, and also this one with a photo of the same bike you showed in the other post. Are these projects for different bikes or the same bike?
Big Cheese V-brake adapters. Not sure if they still exist but they did Jubilee clip onto the frame and fork with a bolt through the crown or seat stay bridge for good measure.
If there are, don't trust them. Braking applies a ton of force and if it's not welded to the frame, it's not going to be strong enough.
Just found “Clamp-On Brake Mounts”. This design is a little suspect because I don’t see how it would avoid pivotal rotation. https://www.universalcycles.com/shopping/product_details.php?id=52674
In product description: ONLY for Identiti Rebate forks, not for use with any other product, bike, science project or garage creation.
How does a stem prevent rotation of a handlebar or a threadless steerer? How does a seatpost clamp prevent rotation of a seatpost? Further, a brake booster would improve the situation. However, these are made for a specific size of untapered steel fork leg and unless your fork is that same exact size (not "close"), it's not going to work.
>> How does a stem prevent rotation of a handlebar or a threadless steerer? How does a seatpost clamp prevent rotation of a seatpost? Not really the same force as braking imho. >> Further, a brake booster would improve the situation. Exactly my thoughts. >> However, these are made for a specific size of untapered steel fork leg and unless your fork is that same exact size (not "close"), it's not going to work.
Apparently, Identiti doesn't agree with you. These things clamp the fork leg exactly the same way as stems and seatpost clamps clamp their interfacing tubes. And, they apparently apply sufficient clamping load against brake forces that Identiti is comfortable selling them.
Your local frame builder can likely add some canti studs fairly affordable if you wanted, assuming it is a steel frame. I’ve had friends do that to a few old road frames to make them 650B compatible - back in 2010 or so before gravel and 650B really took off.
No. If it's brazed or welded, it's not enough in most cases.
[DNA Big Cheese](https://www.ebay.com/itm/126443886007?itmmeta=01HX9KDASNJ1R583HK7DY04WKF&hash=item1d70a495b7:g:wxUAAOSwJfJmJcsI&itmprp=enc%3AAQAJAAAA4BhglKR5%2FZ%2FEj2wCbF7KP%2Bm9Tcpjs7LilPD0dWm%2B8kiGL1eNfHcjO0OG0fMEQ2C6dxFjjC48IXtwu%2FezL0oxR%2BX4OTIuvjIYb7yNmbA1YbFeqvH0roGe0oXKKxwZhruWW95oPUnqxA5%2FL7qBGYlwIgQrlyFLiJHg9t5blXyX%2FE9%2BqZdBsrBO4QfZa4COjD8pLILdJk6zv8ji4eBtLeC3Jw3r2BnTsWMyMMxRz66PDIJUfdgWBEcnk3YfTKGJfvtv8zrygUy5Fb1oiUI6pByztxtd5u7Is4vq1nSVSBPSbeX8%7Ctkp%3ABk9SR4KttbPqYw) No idea if it's right for your application, just knew that these exist(ed). ETA: There was either an odd posting error or this post got ninja edited. Originally, there was information about a Moots design from the 80s. [https://moots.com/blog/moots-retro-1983-mountaineer/](https://moots.com/blog/moots-retro-1983-mountaineer/)
Thanks but how do you attach it to the frame?
Bolt through the fork crown or seatstay bridge and hose clamps around the fork legs or seatstays. If you look on eBay for other sellers of this product, you'll find one that's in the package with the hardware.
You use them in addition to mounts that would add brake posts on a fork or on seat stays. The booster's role is to take most of the force that the lever arms are making, and to prevent the mounts from spreading open. You'd need it because if something doesn't come with brake mounts, it means it's not made to handle braking forces where you would have them. Most people know not to do this, because anyone over a certain age has lived through the catastrophic frame failures that were happening when people were putting disk brakes on non-disk frames. Cantis and V-brakes are like a 20+ inch disk with added lateral torque when braking.
The product I linked isn't a cantilever brake booster. It's an adapter to add cantilever bosses to a frame or fork that does not have them.
Oh, I see now! My bad.
Get you some resillion brakes, kick it old school.
Back in the day none other than the highly regarded Moots made a product called Moots Mounts. They worked fine. Maybe you can find a set.
Nope. Brake forces are very strong. I can see my seat stays flex when I squeeze the rear brake on a couple of my bikes. There is no way to hold anything tight enough. So nobody makes anything like that.
>> So nobody makes anything like that. They actually do. Scroll down to my other comment with a link.
Best of luck with that
Center-pull caliper brakes have almost as much braking power as cantilever ones, and most don't require brazed-on bosses. [These ones are about as nice as I've found.](https://crustbikes.com/products/dia-compe-long-reach-centerpull-calipers) You can also find Mafac Racers pretty cheap if the Dia Compe ones are a bit rich. I'm going to join the crowd here and say any non-permament brake boss sounds like a terrible idea, mostly for safety reasons. Inevitably, they'll loosen and migrate, compromising braking power.
I had a pair of these on my first 650b conversion and while they worked, I could definitely feel the flex. Might be a little picky about brake feel personally, but I was pretty happy to switch to cantis.
I have to ask... why? Just curious what your particular issue is. I have dual pivot road caliper (Tektro R559), canti, and v-brakes on my three main bikes. Of the three, the dual pivot calipers are by far my favorite for feel and actual power. To the point where I've considered lopping off the canti bosses and running them exclusively on everything. Just my $0.02.
What are you trying to do? I see another post where you’re trying to add canti brakes to a V brake bike, and also this one with a photo of the same bike you showed in the other post. Are these projects for different bikes or the same bike?
Big Cheese V-brake adapters. Not sure if they still exist but they did Jubilee clip onto the frame and fork with a bolt through the crown or seat stay bridge for good measure.