Auto Wheel (AutoWheel) was a motorcycle produced from 1910 to 1922.
The 1922 Auto-wheel. Now Imported from America Increased Engine Size.
The Auto-wheel was one of the earliest motor attachments for fitting to pedal cycles. It first saw the light in 1909, with a tiny two-stroke engine as its motive power. It then assumed a practical form as a 1 h.p. four-stroke on which the Auto-wheel itself was mounted, and enjoyed many years of prosperity until the war. Up to that time it was manufactured in Great Britain, but since has been found impossible to arrange for Auto-wheels to be turned out in this country, and it is at present being manufactured under licence in the United States, but in a different and improved form.
This attachment, which is handled here by Auto-Wheels, Ltd., Russell Road, West Kensington, London, W.14, now has a 2 h.p. engine, and, as before, is a four-stroke. The bore and stroke are 64x64 mm. (206 cc), and the automatic inlet valve is still retained. A flywheel magneto is now fitted, and the lubrication, instead of being effected by the bird fountain system employed on the pre-war Auto-wheel, is by means of a simple form of plunger type pump, driven by an eccentric off the camshaft. This pump delivers oil through the bearings, and sprays it on to the connecting rod big end. The level of the oil is shown through a window at the base of the crank case, which forms a sump. Transmission is now by gear wheels instead of chain, and the small pinion on the crankshaft meshes with a pinion coupled directly to the Auto-wheel itself. This gives a reduction of 8 to 1, and as the large wheel is mounted on the camshaft, a four-point cam is fitted.
The Auto-wheel attachment is fitted with a prop stand, and is pivoted to an arm attached between the rear spindle and bottom bracket of the bicycle, while there is an additional stay to the saddle tube. A single lever carburetter is fitted, the carburetter and exhaust lifter controls being by Bowden wire. The tyre size is 20x2 in., and the weight of the complete attachment is 65 lb.
The MotorCycle, December 8th, 1921