Trail/Enduro use crankset Megatooth, thick/thin tooth design for maximum chain engagement Solid forged AL7050 crank arms with 30mm BB392 spindle Direct mount chainring Use modular spider tool BTI #FS0294 for chainring replacement or chainline adjustment. Place 3mm spacer between direct mount ring and crank arm for 148mm Boost spacing/53mm chainline. Place 3mm spacer between direct mount ring and lockring for 157mm Super Boost spacing/56mm chainline Bottom bracket sold separately. 670g