“ Compared to other makes these Helix 155mm cranks are a bargain price from Tredz so I didn’t make an expensive mistake if they weren’t suitable,and they arrived really quickly too which meant I could try them asap! They feel sturdy,are well finished and come with pedal washers,self extracting bolts and tough crank protection boots as standard. Fitting was a doddle too. The drive side also has a large integrated rubber washer which actually prevents my chain getting completely jammed inside my Race face cranks’ spider during transportation which has on previous occasions meant NO ride. So far, 5 rides in,and my old knees and pedals are loving zero pedal strikes and now being able to easily spin higher cadences suit the dynamics of my SX motor. Best upgrade I’ve bought in a long time. 👍