^^^ I agree with everything he said except that the bb width should either be 68 or 70mm. The older italian frames are the only ones that use 70mm. What kind of frame is it? I just bought a set of bulletproof cranks that were 22.95 before shipping. The only difference between the UN7- and the UN5- is that the 50's series have a solid axle and the 70 series have a hollow axle. Since the frame is probably already pretty heavy, you can save some money and get the 50 series. Most bike shops will have them for around $20.