SL Pro Crank Review
The Speedline cranks are Super strong, yet still maintaining a lightweight feel, the Speedline SL Pro Cranks are built specifically for BMX, so there is no need for extra spacers between the frame and bearings. The crank is of the 2-piece design which seems to modern standard. The arms are forged from 7000 series aluminum and are press fitted on a 24mm cro-mo hollow axle, they also have a replaceable 4 arm 104 bcd spider, cro-mo pedal bosses. All the hardware is oversized so it won't strip after repeated use. They are used by both the Supercross and Speedline factory race team riders.