Grabby brakes

[alexmish]

Originally Posted by JCL

Friction doesn't depend on contact area though (within reason), only on coefficient of friction and pressure (clamping force). Pads can become glazed as they wear, but changing the area wouldn't matter.

I think it has more to do with the various interventions that change the pressure applied.

size matters

seriously, dont you think there is a reason why rotors and pads on bmws are so huge compared to other japanese cars !?

[JCL]

Originally Posted by alexmish

size matters

seriously, dont you think there is a reason why rotors and pads on bmws are so huge compared to other japanese cars !?

Yes, it is so they can produce more black brake dust. Just don't expect it to impact stopping distances. Swept area can matter, ie rotor size, but not brake pad size. Think of it this way; if the caliper applies a certain force, the same in both examples here, and you have a small pad and a large pad, the large pad has a lower pressure since the force is divided by pad area. That means that size does matter for caliper pistons, just not for brake pads

Put another way, if she says she likes the size of your brake pads, she's faking it.