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I installed a pair of Hope disks on my bike today, and am having a few issues.
Firstly, they are out of true by ... ermm ... I think somewhere around 0.5mm. Unfortunately there simply isn't enough space between the pads to compensate for this, so you can hear them touch with every revolution.
I'm quite good at straightening wheels on sight alone, so I'm fairly confident that with a lot of patience (and a good working stand, gotta get me one of those), I can bend the disks a bit in the right places to get them to within 0.1mm.
However I was wondering if anyone has any tips that could make things easier.
Secondly, and this is the bit that bugs me most, the cooling holes have really rough edges.
when the pads touch them, they make the same sound as when you slowly turn the wheel and let something run against the spokes.
I guess it's just a matter of crude machining. They probably did the braking surface first, and then punched/cut the holes, leaving rough edges on the braking surface.
Can I sand the braking surface or is that taboo? I could just sand the edges of the holes to smooth things up a bit, but that would involve a massive amount of work.
There's 54 holes on each disk's braking surface alone, and both disks need to be sanded on both sides. That's 216 holes to sand, which would take half a day at least.
Any tips are welcome.
Firstly, they are out of true by ... ermm ... I think somewhere around 0.5mm. Unfortunately there simply isn't enough space between the pads to compensate for this, so you can hear them touch with every revolution.
I'm quite good at straightening wheels on sight alone, so I'm fairly confident that with a lot of patience (and a good working stand, gotta get me one of those), I can bend the disks a bit in the right places to get them to within 0.1mm.
However I was wondering if anyone has any tips that could make things easier.
Secondly, and this is the bit that bugs me most, the cooling holes have really rough edges.
when the pads touch them, they make the same sound as when you slowly turn the wheel and let something run against the spokes.
I guess it's just a matter of crude machining. They probably did the braking surface first, and then punched/cut the holes, leaving rough edges on the braking surface.
Can I sand the braking surface or is that taboo? I could just sand the edges of the holes to smooth things up a bit, but that would involve a massive amount of work.
There's 54 holes on each disk's braking surface alone, and both disks need to be sanded on both sides. That's 216 holes to sand, which would take half a day at least.
Any tips are welcome.