Wheels and wheeling; an indispensable handbook for cyclists, with over two hundred illustrations . gg-shaped section, the part in contactwith the ground being much sharper than the rim slightly flattened sides and the narrower treadreduce materially the tendency to slip, the availablecushioning space is considerably greater than that ofany other tire of the same dimensions, while the rimaffords extra support along its edges, and its center,being slightly convex, throws up the air of the most singular points about the Seddontire is the fact that there are two tubes or bladde
Wheels and wheeling; an indispensable handbook for cyclists, with over two hundred illustrations . gg-shaped section, the part in contactwith the ground being much sharper than the rim slightly flattened sides and the narrower treadreduce materially the tendency to slip, the availablecushioning space is considerably greater than that ofany other tire of the same dimensions, while the rimaffords extra support along its edges, and its center,being slightly convex, throws up the air of the most singular points about the Seddontire is the fact that there are two tubes or bladders,one normally inflated by one valve, another being de- 3*6 WHEELS AND WHEELING. flated and lying flat, only to be inflated if the firstshould be punctured, the very slight addition to theweight being amply recompensed by the addedsecurity. The advantages claimed for this tire are : i. Agreater depth of available cushioning area than anytire in the market, and a consequent increase in speedand ease of running. 2. By means of the system offastening the cover, the air tube can be removed there-. Seddon Pneumatic Tire. from in less than a minute, and replaced in threeminutes. 3. The canvas bag of the older systems isdispensed with entirely, the only canvas used being aninsertion of specially prepared flexible web in theouter cover. This plan has been found to work ex-tremely well in practice, increasing the resilience ofthe tire, while avoiding the complication of unneces-sary parts. 4. There is a second air chamber, whichcan at once be inflated through an independent valvein the event of the inflated air tube becoming punc-tured. 5. It is less of a mudslinger than other tires, PNEUMA TIC AND CUSHION TIRES. 317 from its narrower ground-bearing surface, and alsofor the same reason it is almost perfectly free fromside slip. 6. Its great depth, and the fact that thecover is of molded rubber, make it possible for thetire to be ridden as a cushion tire in the unlikely-event of both ai
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Keywords: ., bookcentury1800, bookdecade1890, bookidwheelswheeli, bookyear1892
