Join Date: Mar 2015
Location: All Roads Lead To Yosemite, CA.
Model: 1500 SE
The purpose of slots on the sides of brake rotors is: to provide an escape path for expanding pad gasses being generated by the braking torque.
In EXTREME situations the outgassing from HOT-HOT pads can physically push the pads off the rotor- despite having your foot or hand buried!
Not a situation encountered in sane street riding, mountain fun maybe, Maaaayyyyybe
On the track, yep
Getting Your Groove On: 2 schools of thought- forward or backwards in relation to direction of travel ~,
Or is that mostly for show- as its not about cooling or dissipating heat- its an escape path
Note: A rotor clearly marked LEFT shouldn't need a directional arrow as well
Just because you all drive on the wrong side of the road over there.........