i got the new bevel wheel but it doesn't seem to want to fit on. i lubed up the shaft, and pounded the heck out of it with a wood block, but it's still sticking out about a 1/2 inch. i only saw one size on the bikeberry site. any suggestions? i figure if it's on so tight i don't even need the woodruff key, cuz it fell out as i was pounding the wheel in and i just left it out.