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I have a Vanmoof VM3 bike that has a coaster rear brake and I want to add a rim brake. What size should I get or do you know one that is compatible to this bike?

enter image description here

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  • 1
    If you can make it work a front brake will be a nice add.
    – David D
    Aug 26 '20 at 17:05
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    Did you chose a brake similar to in the answer, or a classic mountain bike v-brake?
    – Matei
    Oct 11 at 9:03
  • @Matei V-brakes wouldn't fit on the bike pictured: it lacks the required attachment points on the fork.
    – Renaud
    Oct 11 at 9:40
  • I changed the front wheel and chose a brake caliper that is normally fitted to fat bikes. Alhonga is the brand, extremely cheap, however not very good quality. It was the only one I could find
    – Redds
    Oct 15 at 12:34
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If your bike looks like the stock photo, then possibly. However you may need new wheels.

There's a bolt that passes through the fork from front to back, just above the mudguard/fender. This would be where a caliper brake would mount, and the mudguard would be "pinched" under the nut, on the other side of the fork from the brake mech.

You would need a side-pull caliper which has enough "reach" to get out and over the mudguard, and then down to the brake track on your wheel's rim.

This fork would not support a V brake or any other style that bolts onto a pivot below the brake track. A caliper brake like a tektro R559 would likely reach. (not a product rec, just an example of the style)

enter image description here

You'll also need a brake lever for your handlebars, and an inner cable and length of outer. I'd suggest looking for a lever that can clamp around your bars without having to undo the fancy leather-like grips. They may not survive being removed and reinstalled, so a brake lever with a two-part clamp will make it much easier.

However, before you start, look at your front rim and figure out if it has a brake track or not. The brake track would be silver or possibly black, but would generally be flat and just inward of the tyre. This is a rim brake track:

enter image description here

I suspect your bike's rims may lack this brake track because it wasn't designed to need one. If there's no brake track, you need a new rim on your wheel, which may require a new front wheel instead.

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    Thank you so much for the effort!!! I did buy a new front wheel and now the bike has a front rim brake!
    – Redds
    Aug 29 '20 at 9:04

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