Are ZIPP seatposts compatible with 7x10mm saddle rails? No, 7x10mm rails are not compatible with ZIPP seatposts, and a 7x10mm seat rail adapter is not available. Related articles Are Zipp seatposts compatible with 7x9mm oval or round saddle rails? Yes, the SL 70 XPLR handlebar smoothly integrates with the SRAM RED XPLR AXS drivetrain. It also works well with RED AXS, Force AXS D2, Rival AXS, and Apex AXS controls.