Singlespeed & Fixed Gear - Cheapest Fixed option

Originally i had planned to convert my old road bike to a fixed gear. I was in the process of testing the different gear ratios most suitable for a fixed bike and i've found that the aluminium frame flexes considerably if i try to accelerate quickly off the mark or if i'm powering up a hill. Its enough to make the rear wheel rub quite badly on the frame so i'm thinking its best not to use this old bike.
I figure its probably best to just buy a whole new fixed gear bike and i was just wondering what would be the best choice? I'm not looking for anything flash or fancy just something thats good value for money. I saw the Fuji Track advertised in a recent bicycle magazine, would that be a decent bike?

id get a pengy

I see you have utilized the search function, excellent.

kilo tt

bikesdirect is where you want to go.

Incidentally, I doubt it's frame flex that is making the tire rub against the frame. Usually you get flex in the bottom bracket area, not so much the chain and seat stays

Buy a Huffy. Take welding torch to rear hub until it becomes 'fixed' and then you win.

Otherwise, that search button rockzorz.

Yeah, something else is going on back there. It is hardly possible to flex a frame enough (and in the right directions) to get a tire to rub against the stays. I suspect your rear wheel is not completely tightened to the dropouts.

buy a Leader. Way better than bikesdirect.

Thanks for the replies. Yeh i've done a search i just thought it would be a good idea to get some opinions from fixie enthusiasts. I'm new to this style of bike so i need all the help i can get.

Thanks for the tip jgedwa i'll have to have a good look at the rear wheel to see if thats the cause of the problem.

tighten up the rear axle, because it's probably slipping.

yea, an aluminum frame should be hecka stiff if anything...

I've figured out that it must be my new rear wheel that was flexing and causing the tyre to rub. I put one of my old wheels on and there was no rubbing at all. Anyway i've taken that wheel back now to get it looked at. Thanks again for all the help.