These are extremely hard to nearly impossible to find in 16mm size locally or anywhere in the U.S. and you will need them or something similar if you have a 3000w or greater motor with 16mm axle. It will take forever for you to receive these torque arms as they use one of the slowest shipping options known to man but there are really no alternatives unless you want to fabricate your own. I ordered 2 and neither had the little spacer washer that is pictured but I didn't need it. I say go for it and just try to forget about it and be patient.