I dont know about simple green but for my brakes wich are good clean and dont stop me i try 1 of the two things build my own parachute for slowing down or put a little bit of soda on the rim where the brakes touch the rim leave the soda out in the heat for a day or two for maximus stopping power this way you clean the brakes mroe often but you allways have cheap brakes when around a conviniant store and are thirsty.