switching from sew-ins to normal tires
 

Hello,

I just got a new vintage raleigh and it came with sew in tubulars. The vittoria tubulars I have on there are listed as 23-28". I think this means its a 700c? I wanted to know for certain what size of rims I could get but wasn't sure how to measure the inner width on the rim I have.

Any help would be greatly appreciated- thanks!

-m

Yes, you have 700c wheels.

http://sheldonbrown.com/tire-sizing.html#tubulars

Sew ups, not sew ins. If you're not a TDF racer, dump the sew ups ASAP for clinchers.

might be easier, and less expensive to buy a clincher wheelset that's compatible with the droput width of the bike.
Rebuilding is as costly, or more, than just geting a new set. There are plenty of options - even new stuff - on ebay for very serviceable and nice running clincher wheels. If the old wheels aren;t Campy, Dura ace, Suntour Comp or some high end vintage stuff like Phil Wood, then they're not worth converting. The vintage forum might have good sourcing for getting appropriate wheels for the level of the bike in question.

just buy new wheels. That's what I did. better than a rim swap.