I converted my mountain bike to a SS for late fall early spring because of all the mud. I have never been so sore from a bike ride. I was still able to get most of the hills. It is almost impossible to get a good chainline when you convert to SS or fixie on a geared bike. You have to do lots of shimming to get it close to perfect. Using a chain tensioner sucks and I doubt it will work for fixed gear so the bike should have horizontal drop outs or an eccentric bottom bracket to get tension in the chain. Surly sells all the parts you would need to convert it. If you end up getting a rear wheel built they make flip flop hubs you can switch between freewheel and fixed or 2 different sprocket sizes by flipping the wheel around. Also if you have a rear wheel built they build them differently for SS so it will be stronger and or lighter.
you know exactly what I'm looking at. horizontal drop outs aren't easy to find in a frame after the 70's, then I need to find one that is sized properly. there are some frames that don't have a true horizontal drop out but may still work. I will not be using a chain tensioner. I do have access to a mill and lathe and can make any sized spacer I need (if it's not otherwise available)
In the end we may end up spending more on the frame than I was hoping to get it sized right since she wants a mens style bike and she's around 5'4.
I really like the idea of a flip flop hub with a shorter gear on the freewheel side she doesnt' respond to that suggestion at all.
I've also read about "true" track hubs falling apart with road use because they wern't designed for that type of abuse. so, I'll have to keep that in mind
I keep hearing about how converting is less safe and can be dangerous. I assume they're talking about shimming the rear hub and centering the rear wheel. I guess if done wrong there could be too much play back there. Maybe they're talking about something else? I should know tonight.
If I ever build one for myself it will be a big POS with slapped together parts and welded drop out. :icon16: