Moose Racing Starting Block Base 4101-0521Starting block helps position you on your bike for more neutral riding position on bike and help provide a straighter launch off the gate The starting block offers two different height riser kits to customize how high you need the starter block to fit your height. Made to fit from mini riders to adults. Built in traction pads on top to provide better traction and anti slip surface when pushing off the gate. Made of high quality aircraft aluminum with