Octopoker

Don't they exist? I'm having the hardest time finding any online or locally. I wanted to convert my front wheel into a disc brake. I've found pictures on the internet, but no place to actually buy one. goo.gl/NvAkkf and goo.gl/v4q4g6 copy/paste please since I can't post links yet.

Maelochs

You need a fork designed for discs. I have never seen a bolt-on/clamp-on conversion, and I am not sure I would trust one .... something about having my fork snap under hard breaking doesn't appeal to me.

BlazingPedals

To add what Maelochs said, if you get the fork you need, it won't be made to take a bolt-on axle. Most aftermarket disc forks I've seen take a quick release axle, and hubs with quick release axles are easy to find.

danmyersmn

Why would a solid axle be different in diameter than I quick release axle? I didn't know that you needed a bike made specifically for solid axle vs. quick release?

wschruba

You often don't, and it usually isn't a problem, but better QR wheels are typically 9mm axles[ends], whereas less expensive ones/most bolt-on hubs are 9.5mm. In many (most?) cases, they are interchangeable, but some forks will just not accept the larger size without modification.

fietsbob

Drum brake wheels can be retrofitted in a bike that used to have just rim brakes... I have done so..

Ironfish653

About 15-20years ago, when disks were just beginning to appear on MTB's (originally on high-end downhill bikes) there were bolt-on billet pieces that would let you mount disc rotors and calipers on to a bike that was not originally equipped with discs. I think i saw them in the back of a Mountain Bike Action.

The only disc brake conversion parts i can come up with are some hoplessly cheap ($5) brackets from
China. @Octopoker - The wheels you linked are heavy chrome steel wheels from an 'industrial' cruiser/klunker like a Worksman, that's been converted with a motor. The site that was selling those wheels is down, so i don't know what they're asking for, but you can get a decent set of alloy MTB wheels for $100-120.

Ironfish653

If OP is asking about bolt-on MTB wheels, we can probably assume it's a steel fork.
Even if it was a carbon road fork, i can't imagne that the forces involved are strong enough to snap the end off the fork leg. Bikes with carbon forks and disc brakes do exist.

The big issue is getting everything to line up right, and stay there, especially since you will probably have to 'adapt the adapters' to make it work.

Plus, cost. Pretty much any MTB over $400 from a major brand already has disc brakes, so OP's bike is probably cheap, or old, or both. Unless he's been given a disc setup, the cost of amassing the bits-n-pieces to make this work will probably be much more than he expects.

Octopoker

I'll have to do some reading on drum brakes. But yes, my bike is a 15+ yr, steel frame MTB from Target. It's never given me any problems. An occasional tuneup and it was always ready to go. I'd hate to buy a whole new bike just for the brakes. I recently swapped the rear wheel into an e-bike motor and was told to look into a better braking system for it. But I only wanted to change the front wheel brake for now using one of those $20 brackets I've seen online. Changing out the fork sounds like a good option too.

Maelochs

Cheapest route is getting some $3 brackets of EBay ... If you have good insurance.

Smartest route is finding a steel, Al, or CF fork with built-in posts or disc mount holes.

Have you considered shoes with thicker soles?

Octopoker

And stop like the Flintstones? Well, I'm going to visit some bike shops this weekend and see what I can find.

BlazingPedals

It's usually cheaper to buy another Target bike than to modify an existing one. At minimum converting to disc in front will require rebuilding the existing rim with a disc-capable hub, an adapter of dubious safety to allow mounting a disc caliper to the fork, and the brakeset which would include the caliper and rotor. In practice, it probably means buying a new fork, new wheel, and the disc brake/rotor itself.

coominya

Believe me, you won't just be getting brakes into the deal. Keep an open mind and look at some new bikes. It's the easier softer way.

dabac

What you linked to looks like fairly regular disc brake hubs.
I've seen 6-bolt adapters that screw on to rear hubs using the freewheel threads.
No help for you there.
BITD there were disc brake adapters that mounted to the left spoke flange.
Meant a half rebuild of the wheel. Didnt sell long.
No help for you either.

dabac

It's not a problem making a disc brake fork from the start.

But some caution IS required when retrofitting a disc brake mount to an existing fork, particularly for the braking forces available during road riding.
The caliper mount does introduce a local bending force at the top of the caliper mount that a rim brake fork would not have expected to see.
By now the industry has learned, but some years ago there were several pics of bent forks floating around on the 'net.

alias5000

Just on the axle issue: you can find 9mm bolt-on axles. I converted my QR rear hub to a bolt-on axle this way.