Quarq Dfour Dub Power Meter, Spider Only 2019 110 Bcd

DFour DUB is designed for Dura-Ace R9100 chainrings. Only compatible with Quarq DZero DUB cranks and SRAM DUB bottom bracket. Spider must be paired with a compatible Quarq DZero DUB crankset with an 8-bolt interface and SRAM DUB bottom bracket.