Sounds like you've cross threaded it. Chase the thread if you can (I don't know who will have a tap or die set with those specs). If you can, take it to a machine shop and have them chase the threads. see if they can get it on for you.Bloodhound said:fuck! I've been trying for 4 hours now and I dont see anyway this FW will fit this cranks, its as if the threads are completely different. Has anyone ever heard of this problem? I get it on straigt, it screws for about 3cm and then meets really tough resistance. Visually there is no problem, the threads are in mint condition.