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Gum-X3D triple rubber compound is optimized to maximize rolling efficiency and cornering grip
so SNS users will need to switch to a Prolink or NNN- compatible boot to use the system
and international ski associations would like to completely ban it from competitive sport
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NENSA at 30
Promax HF-2 Crankset - 180mm 24mm Spindle 2-Piece Black MFPN=71010012PW Gum-X3D triple rubber compound isTrusted by elite BMX racers for more than a decade the Promax HF 2 cranks are a balanced combination of stiffness durability and weight savings. Forged from 6061 T6 aluminum the hollow crank arms spin on a beefy 24mm spindle permanently fitted into the drive side arm. Hollow forged 6061 T6 aluminum HF 2 cranks are lightweight stiff and strong 104mm BCD chainring mount (Chainring sold separately) Chainline: 43 Q Factor: 168 Pedal washers included
