I just picked up an 86 cannondale SR 600 road bike, some of you probably read about it already as I was showing it off in C&V. Anyway, it's a sweet bike but it's geared a little high for my wimpy legs riding in the Colorado front range (I never new my legs were so wimpy until I got this bike). The bike currently has 42t and 52t chain rings has a 6 speed Suntour freewheel with the largest cog having 24t. I have already ordered a 39t chain ring to replace the 42t which should help but I figure I might as well get a different free wheel on order as well. So what would my best option's be as far as free wheel replacement (make, model, cogs sizes, online vender etc)? Also what about a 7 speed free wheel, how would that work out (the frame is aluminum)? My goal is to lower the gearing so that I can ride long distances comfortably in the hills, without sacrificing shifting or riding performance. BTW, the derailleurs are Suntour sprint, the current cranks and chain rings are Suntour Superbe Pro, and it's all friction shifting. Thanks in advance for any input.