Zero Gravity brakes: Ever have this problem?
 

OK, they brake good and are no doubt very light. You cannot re position these brakes on the bike like you can with Shimano presumably since they are single pivot. Seems they are prone to move whenever you have to change a tire. Doesn't happen ever time but it's a show stopper when it does. Happened yesterday; changed the flat and then the brake pad is on the rim, even with the quick release open. Could move it off the rim just a bit but once the brake was applied, right back on the rim. I bet others are having this problem as well. Seems like it would make sense for Zero to include small plastic (lightweight :D ) wrench that could be taken on the road for adjustment in these cases. Surely don't want to be taking a standard wrench out on the road. Anybody else having this experience?

When I have the problem I just remove the wheel, slightly twist the brake caliper then reinsert wheel. Problem solved. Only takes a second.

I don't have ZG's but I've got some single pivots on one bike, and my rear single pivot on my Record bike.

I think your fixing bolt isn't tight enough. Set it and hold the brake with a wrench. Then tighten down the fixing bolt. Make minor adjustments and then you should be fine.

Doesn't make sense really. If it goes out of adjustment just by you bumping it while taking out the wheel means it was never installed good enough to begin with. There's only 3 reasons why it would stick to one side.

1) Incorrect cable housing length
2) Was not bolted on tight enough, assuming 1 is not the cause.
3) One side of the brake spring is losing it's will to live.

For such ridiculously priced brakes, you'd think they give you some sort of centering adjustment screw found on dual pivots. Too bad.

Yes. I carry a 5mm hex and center from the outside rather than using a 13mm wrench.

This never works for me, pad goes right back on the rim. And as I said before, I may be able to get it off the rim slightly but once the brake is applied, it goes right back on the rim.

Makes sense to me. Perhaps I gave too much credit for the LBS to install it at correct torque. The rearward bolt (don't know what it is referred to) is supposed to be set at 50-60 inch pounds I believe? I'll start there. Cable housing lenth looks to be correct. Perhaps the set up has loosened up a bit. Yeah, for the money you spend on these things, it looks like they could supply you with a little plastic wrench just so you can get back home. Thanks!

Are you sure you're putting the wheel back on straight?

So in other words, these expensive brakes allow you to ride .0001 mph faster, but then they cost you an extra 15 minutes each time you remove the rear tire.

Sounds like money well-spent.

Prime indicationthat the fixing bolt ("rearward bolt you reference") is not tight enough.

Perfect adjustment means that it is tight enough that the brake body will stay put, but it will still be just loose enough to allow centering adjustment by grabbing the caliper body by hand and rotating it.

Yeah, you should really sell me those defective brakes.

if your housing length is just right with single pivots they'll stay centered even if the bolt is loose.

For the cost of those brakes, they should center themselves automatically. Dura-ace FTW ;)

The brakes are defective, I say.

Odd, I have had almost no issues with mine. They work fantastic. Just as good or better than every other brake I have. The key is using good brake pads too. If they are installed properly, and tight enough, they won't move just by lightly bumping it while removing a wheel. They are not meant to float like a dual pivot. I've honestly never had any problems. I think they are the neatest brakes I've ever owned.

And though they look like single pivot, they really aren't. They use a cam, for progressive force, when actuated. Works incredibly well. Very ingenious.