i've read numerous posts about people not being able to get the bottom cirlip on with SOME of the race cranks!! and then i got one with the same problem!! the Mek Eur crank from italy. nice crank but the circlip slots are a bit off!! if you haven't experienced this yet, you will!! the cranks were made differently for different years, i guess!! nobody has come up with a real solution!! I've heard talk of a different size bearing, well the width anyways is 11mm instead of 12mm. this would be the best solution if the bearings can be found. you might need to shim it a bit after that but nothing major!!