Moderator: Moderator Team
No rubbing when the bike is tilted. But I have no idea what I did to get rid of it.
Just took off the caliper and the rotor and started all over.
Front brake is still not as sharp as the rear. Will see if it gets better, otherwise new pads will be mounted
I'm about to stir up a can of worms but how can the braking with a disc that has more holes then metal be ever be as good as one with more metal? The coefficient of friction between air and brake pad material is pretty much zero - that is the price you pay for losing weight - do not be surprised if your braking does not get anny better.
Also some design of ligtweight disc will cause the forks to judder due to the pad grabbing the metal then releasing as the disc rotates - I had Gator discs fitted and they were unusable with a pair of SIDs so I fitted Hope floaters and they are fine - the Hopes have the holes stagggered so they are not in one place.
As for better braking, it may be so that the old ones are slightly better. And for a downhill bike I would do it. But this bike is for cyclocross and light cross country and they work brilliant for me.
02GF74 wrote:I'm about to stir up a can of worms but how can the braking with a disc that has more holes then metal be ever be as good as one with more metal?
Did you pass physics? Area is not a value in the calculation for friction, (Fr = Mu x m) I notice no difference going from near full discs to alligators, except the 'gaters squeal more.
For a different explanation, if you halve the contact area you double the pressure for that area remaining.....which is why area isn't in the calc.
I have a new 29er, 160/160 with XO brakes and it sometimes lack braking power, a lot, im only 150lbs. Yesterday I went back on my 26er 160/140 with XX brakes and I was shocked at how much braking power the bike had...
I have 5 rides on the new 29er so far.
I tried to get as much of heat as possible in them. Riding 10-15kmh with front or rear brake slightly on.
Thats how I did it, no idea if its correct, but it worked.
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