MG YB Tyres
The MG YB differs to the rest of the MG Y-Types that fitted 525x16 wheels by opting for 15" wheels instead. This makes them suited to a 560x15 tyre, and though an unusual size Longstone can supply a 550x15 Excelsior.
History of the MG YB
The MG YB was an improvement of the Y-Type, built from 1951-1953. Dropping down to 15" wheels and fitting a hypoid type of back axle and a anti-roll bar coupled with improved shocks & dampners, the YB was the best handling of the MG Y-Type series.