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Ships within 48 hours · Estimated delivery Nov 14 - Nov 19
SHIMANO Equivalent RD-TY21 / RD-A070
It is the first 8 speed specific chainring designed to optimize chain retention when using 8 speed chains
strategic design combining multiple layers of fiberglass
Quad Lock MAG™ Cases are thinner and flatter with a customizable MAG Ring
simply position your phone and the magnets do the rest
Box Components Box Four 8 Speed Wide/Narrow Chainring Black Friday SHIMANO Equivalent RD-TY21 / RD-A070The Box Four Wide Narrow chainring completes that package for the 1x8 system. It is the first 8 speed specific chainring designed to optimize chain retention when using 8 speed chains. The tooth profile and thicknesses are tailored to match the inside geometry of the unique Box Four chain.
US$ 19.00
US$ 126.00
US$ 14.85
