In Reply to: Re: Replacement sizes for 13" tires? posted by Russell Filby on Mon, Mar 13 2017 at 05:24 AM CDT:
: I have fitted on ours 155/80/13 Radial tyres but rims are slightly wider 4.5 as per MG Midget as the original 4s were replaced. Vintage Tyres may be able to offer advice
I have found that on the front of my mk1 climax 4.5 rims from a triumph spitfire will not fit, they foul the suspension. The correct size for the bmc front suspension is the 4 inch x 13 midget wheel.
I have been using 165/80/13 radials on the 4 inch wheel for many years with no problems.