Great Lakes - Here is my problem. Please read it all before giving any advice.

I have too many bicycles.I know some of you are thinking, what Problem?I would like to get back to riding in dirt.I miss it a lot but have not had a suitable bicycle for it for a while . i have a schwinn mtb frame converted to a ss for dirt.The problem is everytime i stand up to crank the chain slips .As far as i can tell the problem is not the chainring. I suspect it is the qr rear wheel. I am considering buying a huffy mtb just for the frame( or raiding my dad's garage for a womens huffy mtb which will cut my costs considerably) and putting the rear wheel on it . In this way i will be able to go to a 1 pc crank and get a brand new chainring for cheap.Sure 1 pc is heavier but not that much and I will ride more and hopefully lose some weight .If i can get a decent ss built up for dirt I can get rid of 3 or 4 bikes . Right now all my bikes are folders except two. I have a 7 speed next comfort bike and the schwinn.I have 4 twenty inch folders. 1 is a 6 speed (ca 40 - 90 gear inches )Dahon Boardwalk.The other is a 7 speed( ca 34-82 gear inches) BF metro.My other two twenty inch folders are a yeah converted from a 6 speed to a fixie/ss. It is not perfect as the chainline is off I would never run it hard on dirt also i need to swap the rear wheel to go from fixed to ss.The other is a Dahon getaway made into a fixie with a great chainline and a biopace crank but i cannot run a flip flop hub because of the cost of having it built up and I will then need a rear brake . Right now i only run a front.I have two 16 inch fixies and a 14 inch fixie( I mean that my folders have 20 inch 16" and 14" tires) The 14 incher has a great chainline and reasonable gearing but is only suited to someone about 5 feet 8 inches with about a 30 inch inseam. Of The two 16 fixies the dahon is a conversion from a classic 3 with a great chainline but it will be problematic to run rear brakes . The other is a Yeah with good brakes front and rear but a bad chainline for fixed to make this one fixed /ss will require two redished rear wheels a 60t front chainring and a 16 or 15 tooth bmx freewheel. Has anyone had a wheel redished ? How much am I looking at for that to be done?

You would probably be best off posting this in SS/FG or the Bicycles Mechanics forum.

You would probably be best off posting this in SS/FG or the Bicycles Mechanics forum. The central problem is the cost of a redished rear wheel not how one does it. The main thing I am after is peoples experience and opinion regarding this central question.Thank you for you thoughtful consideration of this matter.

I can't make sense of what you posted originally. All I saw was a fixie running biopace, and chain slipping. You threw so many bikes in there that I can't tell if the fixie with biopace is the one that is slipping.

If it is then the problem is not due to chain line, but rather the fact that the chainrings are not round, but oval. That would lead to your chain detensioning and retensioning with each pedal stroke. If the detenion occurs at the right moment in the pedal stroke then it would lead to chain skipping.

Chain line is hardly ever the issue. Sure you want one that's fairly straight, and it's a little harder to get chain tension correct, but not impossible.

You ask about re-dishing to help with chainline. Redishing only moves the rim's position over the hub. It does not allow you to move the hub (read cog). For that you need a different hub, and a wheel rebuild because you now need different length spokes. Get the right BB first. Cheaper and easier to do.

No the problem is chainline on my Yeah folders.On my full size ss I am unsure , the problem could be the chainring is worn or it could be the qr rear wheel.The fixie with a biopace chainring has a great chainline . I have no problems with it.It is one of the easiest fixed wheels i have to ride.I went to the milwaukee Bike expo today and picked up a quality bulletproof(TM) crankset. If I lube it well and I stil have the problem I will know it is the qr rear on my full size bike that is to blame for the slippage.