e*thirteen e*spec 104BCD Aluminum Direct Mount Spider - 104BCD 55mm CL Incl. Bolts Bosch Gen4 Black. The e*spec 104BCD Carrier Spider facilitates the use of any 4-bolt standard 104BCD chainring on e-bikes for less expensive chainring replacements and reduc
e*thirteen e*spec 104BCD Aluminum Direct Mount Spider – 104BCD 55mm CL Incl. Bolts Bosch Gen4 Black. The e*spec 104BCD Carrier Spider facilitates the use of any 4-bolt standard 104BCD chainring on e-bikes for less expensive chainring replacements and reduced waste. Forged from 6-series alloy for light weight and stiffness it can be paired with long-wearing steel or lightweight alloy chainrings. Available in Bosch Gen4 Fazua Ride60 Shimano EP8 and TQ HPR50 interface standards.
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