X-SYNC Road Threaded Mount Chainrings Tooth Count:40T or bottom brackets

or bottom brackets

Seamlessly moulded EVA foam with 600 denier polyester construction

Fits Zipp 858 and 808NSW

but it’s got time of flight sensors to detect your exact position on the treadmill

X-SYNC Road Threaded Mount Chainrings Tooth Count:40T or bottom bracketsDesigned for use with our new RED XPLR AXS power meter, these replacement rings are purpose made for use with a Thread Mount spider design. This chainring mount system allows us to minimize weight, maximize stiffness and accuracy, and retain the ability to swap ring sizes. Available in five sizes to tailor your ride to your needs. Thread Mount design is light, stiff, and accurate Available in 38T, 40T, 42T, 44T, and 46T Compatible with all road