Hey all. So I have never been good with math! So please bear with me.

I am looking at an '83 Peugeot CPX-99 frame (has everything but wheels and tires and chain). It is 20", by the owner's description. So what does that mean for me? I am a 5'7" man, so I have found a LOT of good deals that are just too big for me. My inseam is 28", so I need a bike that is 28" to the top frame bar.

So, since I would be building this one up (my first), I would have to account for the sizing myself, correct? Or does a frame determine the rest of the measurements? I figured I could put tires/wheels on that would make it a 28" bike. So... What's that? A 16" wheel? Haha.

I don't know. Could someone help? Can't find anything on Google.

Its a BMX bike, 20" wheels.

What kind of bike are you looking for? Your post is in the Road Bike forum, but the bike you're looking at is a BMX.

If you're really looking for a road bike, this chart is a starting point for figuring out what size you should be looking for based on your height and cycling inseam. Your cycling inseam is your leg length, not your pants inseam as explained on the chart. The chart is for frames with traditional geometry (horizontal top tube), and the frame size is based on the length of the seat tube from the center of the crank to the very top of seat tube (where the seatpost is inserted).

Yes, I'm looking for a road bike. Also considering commuter/hybrid.

Thanks for that great chart!