Disc Brake Adapter

RedB66 · #1 06-30-2009, 09:53 PM

Disc brakes for front forks. I came across this site that offers an adapter for use on front forks (any). They use a free wheel rim on the front turned around so that the disc brake adapter threads on and then there is a seperate bracket that holds the brake caliper. Pretty neat idea!! The bracket for forks without caliper tabs is near the bottom of the page.

Brakes

bbb · #2 06-30-2009, 10:03 PM

I have dealt with that supplier quite a bit being as we are both north of the border and he has been great to work with.

**Dave31** · #3 06-30-2009, 10:27 PM

Thanks for the link, I am looking to add front disc someday in the future.

Goat Herder · #4 07-01-2009, 04:55 PM

Thats very cool there a lot of folks that need better brakes LOL Thanks for the link!

**2door** · #5 07-01-2009, 05:35 PM

Good find, Red,
They have some great looking things. My new Jag project is crying for either disc or drum brakes, especially in the front. Thanks.
Tom

GeneFiorot · #6 08-29-2009, 04:38 PM

I have read that if you loosen your axle nuts and your front wheel can drop out of the fork on its own you should never equip that fork with a disc brake as the action of the braking pulls the axle out of the fork.

RedB66 · #7 08-29-2009, 07:19 PM

Quote:

Originally Posted by GeneFiorot

I have read that if you loosen your axle nuts and your front wheel can drop out of the fork on its own you should never equip that fork with a disc brake as the action of the braking pulls the axle out of the fork.

The bracket is independent from the brake. I don't really understand your point here. "If you loosen your axle nuts and the front wheel can drop out" I would think that part of the installation requires you to tighten the nuts up after you mount the bracket.

GeneFiorot · #8 08-29-2009, 08:17 PM

MY point was on of a safety issue. If you have the type of fork that when you loosen your axle bolts and you lift the wheel off the ground and the wheel simply drops out of the fork it is not recommended to use a disc brake with this type of fork. The reason is the torque applied to the disc when braking tends to pull the axle out of the slot. I have no knowledge of adapters simply what I have stated for others to research as I have done regarding adding disc brakes and the limitations of certain forks notwithstanding using adapters.

Kevlarr · #9 08-29-2009, 10:11 PM

I can't see how that would happen. The torque applied at the disk would be no different then the torque applied by caliper brakes. If your axle nuts are tightened properly there shouldn't be any problem.

GeneFiorot · #10 08-29-2009, 11:15 PM

This was not the first place I read this I am looking for the original comments....

A correctly secured quick release is unlikely to be ejected from the dropout in normal use where rim brakes are in use, although recently there has been some evidence, notably from James Annan, a British scientist working in Japan, suggesting that the moments in disc brake systems can cause quick-release front wheels to be ejected past the lawyer tabs. A small number of serious crashes have been attributed to this cause. This is controversial, and the fork manufacturers have not admitted a fault, although there is some evidence that they may accept the principle, and advice on checking quick release tension has been strengthened. [3][4] A complete solution to ejection risk would involve mounting the front disc brake caliper in front of the fork blade rather than behind, as the reaction force on the disc would then be into, rather than out of, the fork-end. However, this would involve major retooling by fork and brake manufacturers, though British manufacturer Cotic has placed the disc caliper mounts on the front of the right fork blade on its Roadhog fork. This allows standard brakes to be used, and also makes it easier to mount mudguards.