Bicycle wheel

Abstract

A cycle wheel with an axis of rotation and having a median plane perpendicular to the axis, the wheel comprising a rim and a pneumatic tire, in which: the rim includes an upper bridge and at least one left lateral flange extending from the upper bridge and extending radially outward so as to move away from the axis, the upper bridge including a stop positioned on the same side as the left lateral flange in relation to the median plane, so that the left lateral flange and the stop demarcate a left channel, the left channel having, along a radial plane, an opening having an amplitude, a length greater than the opening, the pneumatic tire comprising a casing and at least one non-deformable left bead which, along a radial plane, has a length, a thickness less than the length of the bead, the length of the bead being greater than the amplitude of the opening, the thickness of the bead being less than or equal to the amplitude of the opening; the surface area of the bead cross section being less than the surface area of the channel cross section, and the bead having a transverse modulus between 50 Mpa and 2000 Mpa.

Description

technical field [0001] The present invention relates to bicycle wheels; more particularly, the present invention relates to a new type of tire for bicycle wheels. The invention also relates to a rim intended to receive a new type of tyre. Background technique [0002] Bicycle wheels equipped with pneumatic tires have been in use since the beginning of the 20th century. Currently, there are two types of bicycle tires: tubular tires, often referred to as "boyau" and straight-sided tires (pneumatique à tringle), commonly referred to as "pneu". Both types of tires have their advantages and disadvantages. [0003] Document FR 778 744 discloses an inner tube. The inner tube consists of a fabric ring, which may be coated with rubber, which is sewn to each other on both sides to form a tore. An air cavity is inserted into the interior of the loop prior to suturing. Then, a tread (bande de roulement) is glued on the outside of the pipe ring. The inner tube is glued to the rim. ...

AI Technical Summary

Problems solved by technology

[0015] The weight disadvantage of wheels and straight-sided tires in general, and non-tubular wheels in particular, has the consequence that professional cyclists do not use straight tires on the road or track. Side tires, likewise, are rarely used when traveling by bike on the road without an air chamber

In fact, the use of wheels without air chambers is currently limited to the field of off-road cycling, where the weight of the equipment is not as critical as for road riding

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