Promax Impact 31.8 Top Load Stem Stem Length:48mm Fork Race Diameter : 30

Fork Race Diameter : 30

120 TPI Casing

or 120mm for the 22

Top and Bottom Sealed Bearings

if you want brakes you’ll need to purchase the Box One 520 REAR rim

Promax Impact 31.8 Top Load Stem Stem Length:48mm Fork Race Diameter : 30PRODUCT DETAILS The new 31. 8 Impact stem has a 45 degree top load design for BMX racing and freestyle. Available in 48 , 53 and 60 millimeter extensions, the stems are cold forged from the highest quality 6061 T6 aluminum then CNC machined to refine the shape and further reduce weight. Lighter than many traditional 22. 2 the Impact 31. 8s open design keeps weight low, while maintaining plenty of strength and the oversize 31. 8 clamp ensures that your