Disc brakes

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Mick
Participant
#

I have abike I’m putting together out of a box that has disc brakes.

The brakes use cables and they seeem pretty straight forward.

BUT I’ve never even ridden on a bike with disc brakes before. Is there anything I should be aware of as I put the wheels back on and fasten the cables?


rice rocket
Participant
#

BB5/BB7s?

Parktool has a video on how to set it up. They’re pretty annoying to get just right.


sloaps
Participant
#

Annoying, but predictable in all weather conditions.


Ken Kaminski
Participant
#

Bicycle brakes generally work pretty badly, but discs work surprisingly well.


Mick
Participant
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@Rice rocket annoying to get just right

Thanks. Good to know.

What’s the problem? How do I overcome it?


reddan
Keymaster
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@mick: Hammertruck, with BB7 disks?


Mick
Participant
#

@reddan, Yes the Hammertruck.

Finally pulled it out of it’s box.

I was going to do a trip to DC this spring/summer, but my father, who lives there, is adament about not wanting me to do it. He says that it worries him a lot, so I might skip it this year. (And do other foolish,dangerous things that he needn’t know about).

Not sure of the exact brake model number. I’m guessing, from the comments here, that it makes a difference?


Pierce
Participant
#

Mick, whatever you do, for God’s sake, do not turn in the pads without the rotors/wheel in

The BB7s pop out and are a PIA to get back in.

BB7’s have pad adjustments on both sides, BB5 has it only on one side


eMcK
Participant
#

BB7’s are pretty simple to set up well if you understand the basics of how they work.

The BB5s are hard to set up without some rubbing, best to do what you can and get over a bit of random pad to rotor contact, which probably has no negative effect on your ride.


Benzo
Participant
#

My trick on getting my bb7’s adjusted was that I shoved an index card (actually a torn piece of a PBR case) in one side between the brake pad and rotor while I squeezed the brake lever and tightened the mounting bracket screws on the side that tended to lightly rub the rotors every time I tried to center it. Then removed the ‘index card’ and the brakes were better centered without scraping the rotors. Seemed to work for me.

Afterward, I adjusted the pad adjustment and cable tension for a better fit (and repeated the process at least once)


TeamDecaf
Moderator
#

The one thing I know, Mick – don’t apply the brakes when there isn’t a disc in place to be squeezed by the pads – not a good outcome.

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