30×3 and 30×3-1/2
The Ford Model T (also known as the Tin Lizzie, Tin Lizzy, T‑Model Ford, Model T, or T) is an automobile that was produced by Henry Ford’s Ford Motor Compnay from October 1, 1908, to May 26, 1927. It is generally regarded as the first affordable automobile, the car that opened travel to the common middle-class American; some of this was because of Ford’s efficient fabrication, including assembly line production instead of individual hand crafting.
Tires were pneumatic clincher type, 30 in (76 cm) in diameter, 3.5 in (8.9 cm) wide in the rear (30×3-1/2’s) 30X3-1/2 Wards Riverside, 3 in (7.5 cm) wide in the front (30×3’s)30×3 Wards Riverside. Clinchers needed much higher pressure than today’s tires, typically 60 psi (410 kPa), to prevent them from leaving the rim at speed. Horseshoe nails on the roads, together with the high pressure, made flat tires a common problem. All white tires were also common on early “T’s. Wards Riverside 30×3 and 30×3-1/2 All White.