John Gunnell

“when released, neutral in between. Control lever puts clutch in neutral and applies parking brake. Center foot pedal applies reverse. Third (right-hand) pedal is the service brake, applying transmission brake band. Model T Wheels: Standard wheels are wooden spoke with demountable rims, an option beginning in 1919. In 1925, 21 in. wood spoke demountable rim wheels were an option, these became standard in 1926. Beginning January 1926 optional 21 in. wire wheels became available. These became standard on some closed cars in calendar year 1927. In mid-1925 (1926 models) the transmission brake was made about a half-inch wider, and the rear wheel brakes were enlarged to 11 in. with lined shoes. 1909-1925 were seven in. with cast iron shoes (no lining). Springs were transverse semi-elliptic, front and rear. Model T Steering: 3:1 steering gear ratio by planetary gear at top of steering column until mid-1925 when ratio was changed to 5:1.”
― John Gunnell, Standard Catalog of Ford, 1903-2002: 100 Years of History, Photos, Technical Data and Pricing