Superb quality alloy wheels with no rear hub, M2 grub screw fitting (supplied). Scale 13" diameter (12mm dia x 7mm wide)   Accepts all RS 13" inserts - RS003 to RS018 onwards.Fits 3/32" axle.

Ortmann tires that fit these wheels: 19J, 28A (Spcl) 29, 32, 32A, D, 37B, 39C, 41R, 45D, 50H, K, L, N, 52B, C.  You can find what other tires fit these wheels by looking up the Ortmanns that fit. seeing what cars they fit and looking up those cars for the aftermarket tire recommendations on their product pages.  We know that's a bit awkward, but at least it will give you the tire fit info you need.