Standard fitment is a 27x4.75 (475-18)crossply tyre.
The M was a mid-sized 7CV class chassis usually bodied as a 4-door saloon. Developed from the unsuccessful L model, the car was updated into the M2 and M3 during its lifetime. There was also a larger version, the M4, for the 9CV tax class, but the factory closed, and the company folded before it sold many examples.