Praxis Works Doon Cranks D170-X5034

- Pro-level carbon arms with M30 Thru (30mm) alloy spindle \n- Cold forged, proprietary LevaTime II X-rings (104/160BCD) with steel chainring bolts\n- *M30 Thru BB sold separately, use PX9019 for English 68/73mm, PX9023 for BB30/PF30 or PX9022 for BB86 and PX9024 for T47 external \n- BB tool sold separately, use PX8980/8981\n- Direct Mount 3-bolt for 1x chainring conversion is possible\n- For additional Praxis 2x chainring options, use PX211* \n- Works with 10/11/12sp drivetrains, but not compatible with Shimano GRX front derailleurs\n- Q factor of 147mm\n- Weight without BB: 570g (172.5mm with 50/34t)\n- Unauthorized online sales prohibited by manufacturer