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Old 08-15-06, 02:48 AM   #1
wroomwroomoops
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Disk brakes on a non-diskbrake frame?

Say you have an oldschool mtb frame on which only V-brakes and cantilevers work, and want to install disk brakes on it. What would you do? Are there clamps that would, er. clamp on the seatstay?
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Old 08-15-06, 04:12 AM   #2
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None that I know of, but there are braze-on caliper mounts available. This would cause localized paint damage from the heat and grinding, but if you don't mind a repaint, it's an option.
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Old 08-15-06, 04:26 AM   #3
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There used to be a rear caliper mount that clamped to the left dropout and the canty stud but I don't remember who made it or what it was called. It's been a while since I've seen one.
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Old 08-15-06, 06:42 AM   #4
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The braze-on mount could be fitted to a steel frame but would be impractical to weld to an Al or Ti frame and nearly impossible to fit to a carbon frame. You will also have to change the fork.
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Old 08-15-06, 07:04 AM   #5
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Originally Posted by HillRider
The braze-on mount could be fitted to a steel frame but would be impractical to weld to an Al or Ti frame and nearly impossible to fit to a carbon frame. You will also have to change the fork.
Well, we're talking about steel, here, so it's OK. And yes, good point about the fork, but that's been already budgeted in. Can you send me a link to anyone selling such mounts?
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Old 08-15-06, 07:11 AM   #6
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Here you go

http://www.discbrakeadapters.com/fs_....php?item_id=4
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Old 08-15-06, 07:13 AM   #7
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I'd run a disc brake front and v-brakes rear. Wouldn't worry about a disc on the rear, since the front brake does (or should do) the majority of the work anyway. I have v's front and rear (Avid) and have plenty of stopping power. I can't imagine needing any more power to the rear brake, and my fork will work with disc.
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Old 08-15-06, 08:14 AM   #8
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Man, I hope that company has good liability insurance. That looks like a ready-made annuity for trial lawyers! There is no way I would put one of those on a customers bike. If you really need disc brakes have a reputable framebuilder braze or weld on the proper fittings. Brakes are too important to do half-assed.

I also agree that except for constantly riding in muddy or wet conditions, front only discs will give you all the power you need. Rear brakes lock easily enough as it is.
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Old 08-15-06, 08:40 AM   #9
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Originally Posted by freeranger
I'd run a disc brake front and v-brakes rear. Wouldn't worry about a disc on the rear, since the front brake does (or should do) the majority of the work anyway. I have v's front and rear (Avid) and have plenty of stopping power. I can't imagine needing any more power to the rear brake, and my fork will work with disc.
This what I would do. Swap out the forks and the problem is solved.
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Old 08-15-06, 01:07 PM   #10
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You have a choice of fork changes to add disc brakes, suspension fork, carbon fork with disc tabs and a steel fork with disc tabs. They are all available for mountain bikes. For the rear it's expensive, but Specialized (and another bike maker, but I can't remember which one) used to sell an adapter made by Therapy Components. Because Specialized recommended this as the only suitable adapter I did buy one for a bike that I was adding disc brakes. It's sort of custom made, easy to install and worked well. The company needs to know the rear hub you'll be using. Their web site is http://www.therapycomponents.com/conversion.htm. Reviews are at http://www.mtbr.com/reviews/disc_bra...ct_20529.shtml.
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Old 08-15-06, 03:07 PM   #11
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Originally Posted by BikeWise1
There is no way I would put one of those on a customers bike.
I wouldn't put one on a customer bike either but I might try one on my own bike.

No I wouldn't - I'm a Retro Grouch!
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