The M30 is part of our 30mm spindle line of cranks which also includes the A30, R30 and G30 models. The “M” stands for mountain and the “30” is for the 30mm spindle. The best way to describe this model is, “It’s a mountain bike crank”. Simple.
 
NOTE: Rolling production schedules and international shipping mean turnaround on White Industries products can take up to 6 weeks