Giant Tubeless Tyres Promise Well
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A PPL1CATION of the tubeless I-1 principle to the giant tyre showed much promise. Mr. F. Easton, depot service manager of the Dunlop Rubber Co., Ltd., told the Industrial Transport Associaticin in London last week. Further research and experiment were necessary to improve reliability.
Some semi-drop-centre, conventional flat-base rims, and wide-base rims with loose flanges, presented special problems in tubeless-tyre construction in ensuring an effective air seal between the rim and the loose flanges. The trend would be to provide tubeless tyres in all sizes up to and including 9.00-20 for semi-drop-centre rims without loose flanges, but further development was needed for bigger tyres.
Tubeless tyres would not be interchangeable with tyres having tubes, because rim sizes would be different. Bead seats would have a 15° taper, as opposed to the flat contour of the conventional rim and 5' taper of the widebase rim.
FEEDERS AND TOURS REFUSED
A PPLICATIONS by James Smith PA and Co. (Wigan), Ltd., for a new feeder service between Morecambe and Preston and through to Wigan for Continental tours (The Commercial Motor, January 18), and by R. H. Harrison (Morecambe). Ltd., for new Continental tours starting from Morecambe to cater for hoteliers' out-ofseason holidays (The Commercial Motor, September 28) have been refused by the North Western Traffic Commissioners.