question bout wheels
 

ok so i know this is gonna sound dumb but...i have an old raleigh m50 bike i want to do a fixie conversion...they mtb bike currently has 26inch tires...if i but new rims (700c) will they fit? I mean will it be too small to fit into the slots, like width wise?

1in = 2.54cm

Your hub is probably spaced at 135mm. Most road stuff is either 126mm (old) or 130mm (newer). If you get a wheelset with solid axles you can simply at a couple millimeters of spacers to each side of the hub to account for the difference in width.

The front wheel will most likely clear the fork crown and downtube, but the rear wheel may hit the chainstay, or seatstay, bridge. Also, unless you have disc brakes, you won't be able to make your current brakeset work with the larger diameter rim.

In other words: No, 700c wheels probably won't work.