Converting 1980's to Single Speed

[laura*]

Can you tell for sure that the spacing is 126 from the photo? I don't know anything about this!!!

In the photo it looks like a six speed freewheel. That generally implies 126mm - except if it is a certain uncommon Suntour freewheel that squeezes six gears in place of the five on a 120mm spaced rear.

Also- do you have a single speed suggestion? I want something light (under 25lbs) - I've looked at the Felt Dispatch and Bianchi pista.

I think Jamis has a single speed option.