I just came into a mint condition 71 cm (28") raleigh team usa road bike and have been upgrading it as best I can. I've changed the 27" front wheel to a nice mavic 700c (extended the slots in the brake calipers with a drill press), added speedplay pedals and a lightweight seat. The next step is to switch the 27" rim on the rear for the mavic 700c that matches the front. the problem is that the bike has the older chain gauge and chainwheel/freewheel geartooth spacing. the mavic rear wheel has a 9 speed shimano hyperglide cassette. the current chainwheel has 52 and 42 tooth rings on a 5-point spider. I was given a pair of shimano superglide chainrings, B-39 and B-58 stamped on the sides.
Local bike shops laugh at me or ask for about $220 for a new shimano bottom bracket/spider/chainwheel/crank set that _might_ fit. I hope there's a better way. is there a spider I can attach to this bike so these chainrings will fit? some other cheap solution?
Thanks for the reply. If I may:
-how can I tell if a given crankset will fit this bike? Is this a specific crankset type?
-is "9-speed compatible" the descriptor for what I need to work with the shimano 9 speed hyperglide freewheel?
If you are buying new outboard bearing or a new BB bearing assembly to go with your new cranks you just need to make sure you get English threading and you will be fine. I am assuming that your current BB has a tapered squared axle end. In that case it is probably JIS taper and any JIS taper crankset will fit. You just need to make sure the axle offset is correct. Since you are replacing a double with another double I imagine it will be close enough.