Hope RX Crankset - 170mm 30mm Spindle Hope Direct Mount BlackHope RX Crankset 170mm 30mm Spindle Hope Direct Mount Black. The RX crankset is Hopes latest step into the gravel and road world. Manufactured and tested to the same standards as Hope MTB cranks for confident use on or off road. Two piece hollow design allows for the removal of any unwanted material increasing stiffness and reducing weight Crafted using 7050 aluminum 30mm aluminum spindle is compatible with nearly every bottom bracket system with