Promax Impact BMX Stem - 53mm Top Load Black Weight-540 Tall retention tab at the

Tall retention tab at the top and and a stiff top lip helps to secure the bottle

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Promax Impact BMX Stem - 53mm Top Load Black Weight-540 Tall retention tab at thePromax Impact BMX Stem 53mm Top Load Black. The Impact is a top load BMX stem cold forged from the highest quality 6061 T6 aluminum then CNC machined to refine the shape and further reduce weight. CNC machined 6061 T6 aluminum TECH SPECS Bar Clamp Diameter (mm) 22. 2 Color Black Defined Color Black Length 53 Reach 53 Rise 5 Stack Height 30. 5 Steerer Clamp Diameter 1 1 8" Stem Angle (deg) 0 Stem Type Top Load Weight 278