ethirteen Helix Core espec Cranks for ISIS Spindle - 165mm, 21.5mm Offset, Black Bikes - BMX This model is engineered for

This model is engineered for standard 24mm ISIS spindle motor interfaces

• Hybrid pistons

BBB - JUMPER (35) / BHS-39

Head Tube - UPR: 1-1/8in

ethirteen Helix Core espec Cranks for ISIS Spindle - 165mm, 21.5mm Offset, Black Bikes - BMX This model is engineered forThe ethirteen Helix Core espec Cranks offer high end drivetrain integrity and a premium look at an exceptional value. Forged from tough 6066 T6 aluminum, these versatile 165mm crank arms maximize pedaling leverage while offering improved ground clearance over traditional lengths on low BB trail geometries. Featuring a 21. 5mm offset for a compact, tailored Q factor on standard ISIS spindle motors, they come complete with an alloy self extractor