I picked up a 1970's SS Sekine roadbike for next to nothing in December. It was converted from a 10 speed to SS by the previous owner. Although it's a great ride, I'd much rather have it fixed (Been using my friend's FG more often than my own bike.) My question is, will this bike be worth upgrading or is it much more cost-efficient to buy a used fixed gear? I don't have too much technical knowledge on bikes, so I don't know what needs to be done to achieve FG.

Frame: Steel
Wheels: 27x1-1/4 alloy
brakes: centre-pull cantilever
Cranks: cottered, 52t
Dropouts: Semi-horizontal
BB: 68mm 1.37"x24TPI

If I didn't provide enough information, let me know. Thanks!

if its a ss and you want a fixed, look on craigslist for a used/cheap fixed wheelset. That and some foot retention/brakes if thats your thing.

Assuming the wheelset was coverted to ss and not bought as singlespeed/fixed gear (as we say in the biz a 'flip-flop hub') your best bet and quickest solution would be new wheelset.

if you cant find any thing on CL, then go to veolmine

Cantilever brakes on a frame designed for 27" wheels --- Most aftermarket fixed wheelsets are in 700, so getting the brakes to work might be an issue.

You could always replace the freewheel with a track cog a la "Suicide Hub" but you didn't hear that from me.

I'm sure he means traditional centerpull calipers, like these Dia Compes below, in which case he can probably lower the pads 4mm to accommodate a 700c conversion.



OP: You can convert that bike fairly easily/cheaply, but considering that it has cottered cranks on it, it is probably a dog and you may find a nicer, more modern bike more enjoyable to ride (lighter, faster, better quality parts, etc.). However, if you are looking to get your hands dirty with your first conversion, by all means go at it. Just read this and get cracking: https://sheldonbrown.com/fixed-conversion.html