1950 BSA streamlight
 

hello. Ive just acquired this BSA which i think from the frame number is a 1950 streetlight. I was just wondering what size wheels it should have. I'm not looking for original wheels as i plan on using the bike.
http://i1321.photobucket.com/albums/...psb0pz3tfj.jpg
http://i1321.photobucket.com/albums/...ps2fcwtn9o.jpg
http://i1321.photobucket.com/albums/...pssiltjqgr.png
http://i1321.photobucket.com/albums/...psqqveheu1.jpg
http://i1321.photobucket.com/albums/...pssx7qzoya.jpg
http://i1321.photobucket.com/albums/...pstflfc0iz.jpg
http://i1321.photobucket.com/albums/...psgcatysxs.jpg
http://i1321.photobucket.com/albums/...psby5tnxsy.jpg
http://i1321.photobucket.com/albums/...psjoyanqj6.jpg

I'd wager a guess of 650a sized rims set up for rod brakes.

yes, 26x 1 3/8"
see http://threespeedhub.com/wp-content/...es-1950-UK.pdf

rims at ISO 590 (26 x 1 3/8 E.A.3) Bicycle Rims from Harris Cyclery

If it needs a 28" wheel, you need Westwood rims. They can be found. 26" Westwoods are much harder to find, so if it's 26" You can use Raleigh pattern 26" rims because they were designed to use either rod or caliper brakes.
Very cool bike!