PimpMan

I have basic frame old school beach cruiser i want to install disk brakes in the front only.

1. How to mount rotor my wheel hub is basic no thread or mounting holes it. Do i need to purchase new wheel or there's some adapter?


I found this thing it threads on the hub, am i supposed to use rear hub in the front to bolt it on?



2. Fork has no mounts for calipers i think this $6 adapter should work?

rhenning

Not sure 100% if those brake caliper adapters will work but that is basically what you need to do to make disc brakes work on you bike. I suspect you will need to buy a new front wheel that is made for a brake disc. Roger

Tamiya

Philphine

i've added disc brakes to a few bikes, except for a couple cases (kinda weird so i wouldn't think of them as real viable options), i needed to get a disc brake wheel to start with. i can weld a bit and lucked onto some caliper mounts i could weld to the fork or rear frame though, so i don't have experience with the clamp on caliper mounts.

fietsbob

you need another wheel with another hub, it can be double freewheel hub.
(RH Thread, on left side, braking forces tighten, But..
since you have to build a new wheel there are freewheel 6 bolt hubs too..

IMO, and my experience, get drum brake hub wheels..

easy, simple, retrofits and the brake shoes in them last forever..

Mine were 1st bought in the 80's.. still fine ..
(My Go To winter ice bike is drum brake wheels & studded Tires)





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fietsbob

By the way Axle ejections on forks without 'lawyer Lips' Tips Can happen,
under braking..

if you must bodge those things on, , put it on the front of the right fork blade.

The caliper and pads is the new torque center, when you apply the brakes,
on the front of the right fork , those forces direct the axle further into the drop out,
Not Out of It, like on the back of the left blade..


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PimpMan

I do have Lawyer Lips on my 1.25" fork.

Is there way fit rear freewheel hub wheel instead of buying specialized disk brake hub?

rhenning

You will need a custom built wheel built around a threaded on both sides hub. Something like a tandem bike built hub. Custom so the it is the right width, right number of spokes and right offset. Phil Woods make such hubs but a wheel build around that will with careful shopping be a couple of hundred dollars. Roger

Philphine

on the front? i've done this also, but you're getting into "at your own risk" territory. i just took a rear freewheel wheel and spun an older style disc brake on it (like the old ten speeds had. i guess a spin on adapter with a new disc rotor would be the same. also it was a 20" bmx wheel). it had it's own caliper set up that would slide over the chain stay as it was made to work, but i used it on the fork leg. braking power was pretty weak, between it and an older drum brake that wasn't very strong either i could just say i had brakes.

fietsbob

No torque center shift with drum brakes , like there is , with adding disc brakes..

Sci-Fi

I would suggest buying a new fork designed for disk brake use. You would spend just as much, if not more, for those disk brake adapters with no guarantee your current fork can withstand the additional brake force/twist placed on the left fork leg. Find a lbs that has the equipment to cut/size the stem to fit.

Was pondering doing the same thing myself and there's a lot of forks out there that has both the disk brake tab and v-brake mounting points, so you have the choice to go back or re-purpose the mounting points for lights or whatever.

Darth Lefty 

fietsbob

BITD I bought what could have been a tandem 48 hole hubshell ..* original Phil used a thread on the tubular steel hubshell for both
A single bike freewheel hub , when on the right side, on the rear,
or on the left side on the front for their disc brake .

I used it as a rear hub and laced it to a 48 hole rim.. the company pressed in a rear axle & bearing assembly for me...

* if it were to be a tandem rear , both ends would have been threaded..


For this topic a double freewheel flip flop single speed hub out of Taiwan can work perhaps..



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