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RSX Brifters and V Brakes

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RSX Brifters and V Brakes

Old 10-06-11, 01:35 PM
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DVC45
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RSX Brifters and V Brakes

I used to own a Raleigh R300 touring bike with RSX brifters, and I could swear it had a V brakes and no Travel Agents.

Sooo, my question is... Are all RSX brifters compatible with V brakes?

I am looking to upgrade a bike to RSX brifters, but I don't want the extra expense of buying Travel Agents to make it work with its V brakes.


TIA!
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Old 10-06-11, 02:19 PM
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RSX brifters have the same rate of cable pull as other brifters, so they're not optimally compatible with v-brakes.
it is very likely that your Raleigh R300 had cantilever brakes. Or had some kind of rigged-up travel agent. Or poor braking performance which you didn't notice.
Most touring bikes and cyclocross bikes use cantilever brakes which work with standard/traditional brake levers.
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Old 10-06-11, 05:10 PM
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No, I'm pretty sure it had V brakes. I'll dig up some pics.
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Old 10-06-11, 05:56 PM
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My RSX brifters work cantilever brakes very nicely. I believe RSX has not been made for a few years. I just tried them and looked at the travel. The travel is not very far, I don't think that v brakes will work.
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Old 10-06-11, 10:38 PM
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Here's a pic.


It definitely has V brakes and no Travel Agents.
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Old 10-07-11, 12:54 PM
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Any idea what the length of the arms on those V-brakes is? There are some "mini-Vs" with 80-90 mm arms (measured from center of mounting bolt to where the cable is clamped) that work with road brake levers. Standard V-brakes are about 105-110mm, so the different is not that visually obvious.
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Old 10-07-11, 01:29 PM
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The short answer to the question is NO, not all brifters will work with V-brakes in all applications. The issue is one of rim/brake pad position relative to braze-on boss mount relative to the V-brake arm length.

The RSX brifters aren't much different in pull than other brifters in terms of pull. The issue is that with calipers, like standard short-reach dual pivot 49mm brakes, the ratio of cable pull to brake pad motion toward the rim. V-brakes pads won't travel as far for the same length the cable is pulled, so this forces you to place pads closer to the rim, or the angle them up and exaggerate the amount of cable pulled (i.e. TAgents). My solution for installation is to look at the brake pad pivot washers and order them to get the pads closer to the rim if possible (or add a washer or two to get closer to the rim), and then to make sure the rim is true. I've run into only one issue on a brifter install with V-brake that was incompatible, and that was with a 2.3 inch knobbie on a narrow 26 x 1.5 style rim (22mm external width). There just wasn't enough mudroom for the tire so the pads could touch the rim snug without risk of the knobbies touching the V-brake arms. Solution was to swap frames, rims, hubs and more and go disc or go back to canti's. It was cheaper to go back to cantilevered brakes and that solved the problem for only around $20 front and rear.
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Old 10-08-11, 12:35 AM
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So this Raleigh's ability to use STI for V brakes is still a mystery.
Not sure what kind of V brakes are in there. But I remember, it was a very strong brake. ' did not feel mushy at all.
I just tried the RSX on my V brake bike and it is mushy no matter how much adjustments I make.

I really wish now, that I had kept this Raleigh.
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Old 10-08-11, 12:46 AM
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As mentioned, if the V=brake arms are short enough, in the 80mm to 90mm, and even up to 95mm for the latest shimano levers (which pull just a bit more cable than the old ones), it'll work great. I run them on my cyclocross/offroad bike with campy levers:



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Old 10-08-11, 02:00 AM
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The Raleigh R300 probably had the Tektro 915A V-Brake.
This model brake looks to of come as the stock brake on several BMX bikes in the late 90's, it might be similar to some of the current Tektro BMX V-Brakes.

BMX brakes: https://www.tektro.com/_english/01_pr...list.php?pid=8
CX brakes: https://www.tektro.com/_english/01_pr...list.php?pid=3

Raleigh R300: https://www.bpeckham.com/~bpeckham/r300/
https://www.bikepedia.com/quickbike/B...R300&Type=bike
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Old 10-08-11, 02:19 AM
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I ran regular v-brakes with levers intended for cantis once, I was upgrading an old MTB from v-brakes to cantilevers, and I put the brakes on, then hitched up the cable to the original lever to see if it would work, and it was absolutely fine. One thing I did notice with time is that the lever travel increases very fast as the brake shoes wear, but the system was perfectly useable.
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Old 10-08-11, 07:13 AM
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Originally Posted by Airburst View Post
I was upgrading an old MTB from v-brakes to cantilevers......
I assume you did the reverse of what you wrote above, that is you replaced the cantilevers with V-brakes. Cantilever/caliper brake levers will work with V-brakes if you adjust the pads very close to the rim and keep them there by frequent adjustments.

Actually the "power" will feel very high and the lever pressure requirement very low with this arrangement since road levers have greater leverage (and consequently less cable pull) than levers intended for V-brakes.
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Old 10-08-11, 09:59 AM
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Originally Posted by HillRider View Post
I assume you did the reverse of what you wrote above, that is you replaced the cantilevers with V-brakes. Cantilever/caliper brake levers will work with V-brakes if you adjust the pads very close to the rim and keep them there by frequent adjustments.

Actually the "power" will feel very high and the lever pressure requirement very low with this arrangement since road levers have greater leverage (and consequently less cable pull) than levers intended for V-brakes.

Oops, you're right, I got it the wrong way round, looks like the levers in my brain aren't pulling enough cable today. It did require a lot of adjustment, which is why I eventually got new levers too.
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Old 10-08-11, 10:08 AM
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Originally Posted by cobba View Post
The Raleigh R300 probably had the Tektro 915A V-Brake.
This model brake looks to of come as the stock brake on several BMX bikes in the late 90's, it might be similar to some of the current Tektro BMX V-Brakes.

BMX brakes: https://www.tektro.com/_english/01_pr...list.php?pid=8
CX brakes: https://www.tektro.com/_english/01_pr...list.php?pid=3

Raleigh R300: https://www.bpeckham.com/~bpeckham/r300/
https://www.bikepedia.com/quickbike/B...R300&Type=bike
That might be the answer.

Which one in there is the closest in design to Tektro 915A?
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Old 10-08-11, 12:54 PM
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Tektro changes models all the time, but look for something in the 85mm arm length range. The Tektro RX5 model used on my Ritchey above is discontinued, but you might find them on ebay.
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