Guys I bought old cannondale from tag sale. The owner ran over the rear wheel with the car, so I have to replace it. The gear switching mechanism said "suntour" on it so from sheldon brown's site I understood that "suntour" ultra 6-speed hub is 120mm. So I have to find 700c 120mm wheel? Where? Can I replace it with modern shimano wheels that can be found for reasonable price on ebay or amazon?
Here is the picture of surviving gear. I am not sure what to do next, please help. Thank you.
P.S. the prev. owner said wheels size is 27C. Doesn't that equal to 700C?
found answer on same website: The 630 mm/27 inch size was used on most sporty bikes in the U.S. up until the early 1980s, when it was gradually replaced by the slightly smaller 622 mm size also known as "700C." If your bike was made for 630 mm/27 inch wheels it may be possible to replace them with the 622 mm/700C size if you have room to lower your brake shoes by 4 mm.
Taking a tip from Siu Blue Wind, I too am typing a lengthy passage of text down here to demonstrate the enormous amount of space available should one wish to use it-- in sharp contrast to the avatar text above this part.
Check that spacing, it may not be ultra... I would guess that you have a 126mm spacing as I do on my Suntour equipped 27" wheeled Cannondale. If so, almost any 6 speed rear wheel from the time period will work. The most affordable option might be to buy a 27" 12 speed at a thrift store or garage sale for the rear wheel...
Also, if you want the experience, and the hub you have is in good shape, get a rim and the right spokes and rebuild. Not cost effective, and a lot of work, but it can be rewarding.
Most likely it's 126mm betwwen the dropouts and was equipted with 27" rims. You can get get rear hubs on ebay for 126mm (also called 6 speed or 7 speed) spacing as well as freehubs. A 7 speed freewheel will fit in the same space if you want to upgrade the current hub. Check the front tire for listed size and match rim size. 27" rims are still available as well as tires, but you 'll have to hunt and the selection is increasingly limited.