i need to replace my rear wheel and cassette on my fuji, it is a 12 speed bike but i cant find a 6sp cassette???

Do you have to measure the hub or can you just order a standerd rear wheel and install your cassette on it?

Also pedals, I'm looking for a light weight pedal that I dont need a special shoe to ride with it, any suggestions?

no such thing as a 6 speed cassette. You have a freewheel, either standard spaced on a 126mm hub, or "Ultra Six" for a 120mm hub (which was the usual 5 speed hub width).

a modern wheel will _not_ work without modifications of the hub.

My advice would be to take it to a bike shop with a mechanic that is into those old school bikes (Cycle Logic or Performance) and get some advice...

Actually a modern wheel probably wont work at all without spreading the frame and at that point its probably not worth the cost.

yeah I'm kinda sol on the bike shop aspect we only have 1 and he charged me 45 dollars to change my shift cable and brake cables and had my old bike for 2 weeks.

here is a picture of the hub and cogs Fuji calls it a Mighty 6, 14 by 30t 6 cog

And the best part of all this "the bike rides really nice,its just heavy,really heavy" Fuji weight says 30 lbs.

Tim was able to successfully spread the frame on his 1972 Panasonic, those steel frames are more pliable than you might think. From the photo though, that bike needs a lot more than just a new wheel. I can't believe that rear derailleur is in good shape. Also, that looks like a 27 inch wheel in the photo, not a 700c. Converting to 700c will require relocating the brakes by 4mm, etc.

Replacing with period parts or upgrading to modern parts - both a PITA, choose your poison.

Your bike store needs to contact J&B Importers. They carry 27 in. bolt on rears wheels for $25-40 (your cost). It will be harder to find a 700c bolt on 6speed type rear wheel. The $45 cost could have something to do with the condition your bike is in. Quite often it can take longer to work on a bike like yours than a new bike - trust me. You may consider to save your pennies and invest into a newer bike. I know you say the bike has a sweet ride but it looks like it has some issues that need to be addressed (especially if the remaining parts of the bike look like the rear parts. I am not saying you have to buy a new bike but it might not hurt to start looking for something in what ever your budget will allow.

its in pretty bad shape here is a picture

yeah and its a 27" x 1 1/4" tire,not really intrested in dropping to a 700c if i can find a replacement for these. I might just sand down the rust and restore this one its not bent just has a little rust.

how do you measure the hub on the tire and the rear fork?

Just measure between the inside on the drop outs. As mentioned before about being 126mm or it could be 120mm. You would be best to just leave the frame as is (no bending of the tubes) and stick to the same wheel size. The replacement wheel I mentioned earlier will fit your bike-but you may be opening a can of worms. ie.may need new rim tape,new tire,may not be able to remove cassette and there can be more issues to follow. You are $75 into the bike already. Have you consideed how much you are willing to spend on the bike?

not much I found 27 x 1 1/4 tires from performance bikes for 8 bucks a piece so those are being ordered monday probablly need to order rim tape too. I would like to start disassembly monday and start sanding down the frame and polishing parts