This Brake typically works with Bikes with 1.75" ( Middleweight ) - 1.95" ( Newer BMX) - 2.125" (Fat Tire) Wheels and Tires.
Pivot Bolt is 6mm traditional nut style with a 10mm nut.
The MX lever fits on 7/8" handle bars, can fit on some oversized bars but may need special effort or longer bolt. Lever applies most anywhere and does not require the removal of grips or handle bar tape to apply.