The new Michelin TRX rim was designed with a lower, flatter flange than that of conventional rims. The invention of the TRX by Michelin in 1973 was the first instance of tyre and rim being designed to work together as a single unit. So the pre ward millimetric Bibendum tyres cannot be fitted to the more common place imperial well based wheels (and vice versa).Ĭlick here to see the available range of TRX, TDX and millimetric classic tyres Tyre dimensions for these Bibendum rims are predominantly given in metric terms rather than the more commonplace imperial measurements used for well-base wheels.
However as the well-base wheel proved its integrity and its design was refined the Bibendum rim was discontinued. Michelin, aware of the concerns over tyres detaching themselves, pursued the design of a rim with a well for only half its circumference. If you select your tyre on our Straight Sided Vintage Tyres page, view the product and it should offer you the correct inner tubes and flaps. When using Split rim wheels on your historic automobile, you need to fit inner tubes and flaps. Lucas are now making an excellent range of straight sided vintage tyres. These rims have various locking mechanisms which prevent the rim collapsing during normal use. The rim is cut through, and when removed from the wheel, can be drawn inside itself reducing its circumference and allowing the tyre to be removed and refitted. The split-rim incorporates a rim which is detachable from a wooden wheel. From prior to World War One until the late 20's this style of rim enabled manufacturers to utilise and gain experience of wired-on vintage tyres before the general acceptance of the well-base rim. The split-rim was very popular with vintage American car manufacturers such as Packard, Dodge and Buick and was also used on Rolls Royce Silver Ghosts built in the U.S.A. Vintage Car Wheels Split Rim Wheels for Wired-on Vintage Tyres Wired-on vintage car tyres can be used with the wheel types discussed below. Within the bead a solid wire ensures that the tyre's bead circumference cannot stretch and will always be smaller than the external circumference of the car wheel rim. Wired-on Vintage Car Tyresīeaded edge tyres were succeeded by safer wired-on crossply tyres in and around 1924 in Europe and slightly earlier in America.
Beaded edge tyres can only be used with a beaded edge wheel rim. The most common cause of a beaded edge tyre failure is lack of pressure allowing the tyre to detach itself. A minimum tyre pressure of 60psi is needed to push the beads into the clincher of the rim and keep them in place. These beads fit into the hook (clinch) of the vintage car wheel rim. Beaded edge veteran and vintage car tyres have large circumferential ridges of hard rubber (beads) running round the inside circumference of the side wall. Prior to 1924, in the veteran and vintage automobile period, the majority of European manufacturers fitted wheels for use with beaded edge vintage tyres, and some car manufacturers continued to do so after this date.
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