okay so i just bought a old 70's Scwin that i saw some kid riding. and im new to the whole fixie thing so this is a project i was going to ask. what gearing should i get if it has a single 48t sprocket.?

also what size wheels should i get?

16teeth and up 700c size wheels

i have no clue what that means.

16t meaning the cog on the back wheel should be 16t, and the tire size should be 700c

okay. one more question what is the actual piece that makes it a fixed gear not the whole wheel but what would i look up to find that

win.

Spend some time with the search engine... at least make an effort before asking. A lot of build threads in this section of BF.

doesn't a 48:16 leave you with one skid patch?

Do not get a 48/16 gear ratio
If you ever get into skidding you will only have 1 skid patch with that ratio
Get a 1/8" 17t cog
You will have 76 gear inches and 17 skid patches