Big Brake Kit Discovery

[cali yaris]

If you think about it, at the perimeter, a larger diameter "circle" has to travel faster to achieve one revolution as a smaller circle. The outside of a larger rotor is where the pad contacts it. I'm armchair discussing here, but I do know the friction would be greater to slow the velocity, causing more heat.

And all of that might not make a huge difference. Let's hear the OP's review!

[eTiMaGo]

Originally Posted by cali yaris

If you think about it, at the perimeter, a larger diameter "circle" has to travel faster to achieve one revolution as a smaller circle. The outside of a larger rotor is where the pad contacts it. I'm armchair discussing here, but I do know the friction would be greater to slow the velocity, causing more heat.

And all of that might not make a huge difference. Let's hear the OP's review!

That's true, but it's my understanding that the main advantage of larger rotors is to have more mass and surface area to dissipate heat from braking, so the temperature increase you mentioned may be canceled out.... food for thought! (and google searches )

[cfeng]

Originally Posted by cali yaris

If you think about it, at the perimeter, a larger diameter "circle" has to travel faster to achieve one revolution as a smaller circle. The outside of a larger rotor is where the pad contacts it. I'm armchair discussing here, but I do know the friction would be greater to slow the velocity, causing more heat.

And all of that might not make a huge difference. Let's hear the OP's review!

There are considerations necessary for matching a brake pad to a rotor. Usually, the inner diameter of the surface that the pad touches is 58% of the outer diameter, in order to achieve greatest braking torque.