Abstract: The invention includes a method for manufacturing a cycle wheel rim having, in radial cross section, two lateral flanges and a bridge, the rim having an outer surface facing outward of the rim and defined by the bridge and by at least a portion of the flanges. The manufacturing method includes the following: extruding a section; bending the section; assembling the ends of the hoop formed from the section by joining one to the another; drilling holes in the bridge for fastening the spokes; machining the entire outer surface in a radial plane and on at least a portion of the circumference of the rim.

Abstract: The invention includes a rim for a cycle wheel, having a U-shaped radial cross section, with two lateral flanges and a bridge connecting the flanges and located so as to be opposite an axis rotation of the wheel. The flanges each define a planar braking surface, adapted to cooperate with a brake pad. The height of at least one braking surface, measured radially, is not constant over the circumference of the rim and has at least one variation in height.

Abstract: The invention includes a rim for a cycle wheel having a U-shaped radial cross section, with two lateral flanges located on opposite sides of a median plane of the rim and each demarcated by an outer surface facing away from the median plane, on the one hand, and a bridge connecting the flanges and comprising an outer surface facing toward the axis of rotation of the wheel, on the other hand. At least one median zone of the outer surface of the bridge, which has a transverse width measured perpendicular to the median plane and greater than 4 mm, is machined over the entire circumference of the rim.

Abstract: A transmission device for a cycle, such as a bicycle, which includes a bottom bracket fixed relative to the remainder of the cycle frame.

Abstract: Quick-release skewer including a longitudinal rod with first and second clamping abutments at first and second ends of the rod, a lever pivotally mounted on the first end of the rod, the lever having a cam, a movable support member between the periphery of the cam and a first outer abutment surface, the movable support member including a locking surface capable of coming into contact with the cam and separated from the first outer abutment surface by a distance D1, the movable support member including an unlocking surface capable of coming into contact with the cam and separated from the first outer abutment surface by a distance D2 that is less than D1. The difference between D1 and D2 is between 2.0 and 4.0 mm. When the support member is in a locking position, the cam contacts the locking surface; in the unlocking position, the cam contacts the unlocking surface.

Abstract: A hub for measuring the driving power of a cycle wheel including a central shaft defining an axis of rotation of the wheel, a hub body mounted to rotate freely about the shaft, a flange mounted to rotate freely about the hub body and axially aligned with the hub body, as well as a torque sensor including a test body which supports at least one strain gauge. The torque sensor is housed in a two-part housing which includes a cutout, arranged in an outer radial surface of the hub body, and a notch, arranged in an outer radial surface of the flange.

Abstract: A tire for the wheel of a cycle, such as a bicycle, as well as a wheel equipped with such a tire, the tire having a substantially toroidal geometry and including a mounting base adapted to be fixed to a rim that is wider than the tire, when inflated, a tread adapted to be in contact with the ground, and two sidewalls connecting the mounting base to the tread. The tire is provided, between each sidewall and the tread, with a spoiler for retaining a closed loop air circulation, whereby aerodynamic resistance is reduced.

Abstract: A wheel rim having an axis of rotation, the rim including a first element in the form of a section of a solid of revolution about the axis, made in a single unitary piece from composite material and including a first end and a second end distinct from one another. The first element is made by pultrusion and constitutes, between the first end and the second end, a section of a solid of revolution having an angular arc greater than 350°, the composite material of the first element includes fibers embedded in a thermosetting matrix, the fibers constituting at least 50% of the weight of the first element.

Abstract: A hub for a bicycle wheel having a hub body rotationally mounted on a central hollow shaft by means of bearings mounted on the shaft, the shaft being provided to be traversed through both sides by a quick-release axle. The shaft has three distinct portions, two end pieces and a central portion made of a material having a lower density than the end pieces, the end pieces being fitted to each end of the central portion, the end pieces having bearing surfaces for the bearings, and at least one of the end pieces having a threaded portion, respectively, for a nut for axially tightening the bearings.

Abstract: A device for measuring the running parameters of a bicycle having a sensor capable of reacting to a revolution of a rotationally movable member through a change of state and operating according to a cycle of changes of state, the sensor being provided to be mounted on a rotatable member of the bicycle, a transmission circuit having an antenna, a reception circuit having an antenna. The transmitting circuit has a circuit for calculating a value of the running parameter based on the signal originating from the sensor, a transmitter connected to the antenna to transmit this value to the receiving device, and an optimization circuit for activating the transmission of the transmitter to moments independent of the changes of state of the sensor.

Abstract: A rim base to be used with the rim of a wheel, particularly the rim of a so-called box section bicycle rim, as well as a rim equipped with such a rim base, and a wheel having such rim and rim base. The rim base is formed by a continuous annular strip having, in cross section, a median depression, forming a U-shaped radial groove provided to be positioned within in the central well of the rim, two lateral extensions provided to be supported upon on the interior edges of the rim that border of the well, and two lateral walls provided to extend along the flanges of the rim. The walls of the rim base are extended by a pair of lips that project toward the inside relative to the walls of the rim base, the lips being adapted to be positioned adjacent the lips of the rim.

Abstract: A rim structure for a bicycle wheel that includes, at its periphery, an annular channel designed to receive a tire, such channel being demarcated by an upper bridge devoid of openings with the exception of the valve opening, and two lateral flanges, such flanges having end butts for gripping the tire. The upper bridge has a narrow and recessed central rim well demarcated by a base and two lateral walls, the rim well being bordered by two bead seats that are oblique from the rim well towards the flanges. The invention is also related to a wheel having such a rim and a wheel equipped with a tire mounted without an air tube and having such a rim.

Abstract: A transmission system provided for a bicycle, including a primary transmission sub-assembly having a set of rear sprockets, whose number of teeth, from one sprocket to the next sprocket in the ascending order, varies according to a ratio of the numbers of teeth that is greater than or equal to a value n such as n greater than 1. The invention also includes a control of the transmission system, as well as a bicycle that includes the transmission system and the control for same. The transmission system includes a single chain wheel for driving the chain, associated with a bottom bracket assembly, and a secondary transmission sub-assembly having at least two drive output ratios, whose ratio of the highest drive speed to the lowest drive speed is equal to a value R between 1 and n so as to introduce at least one intermediate transmission ratio between two successive sprockets.

Abstract: A device for measuring the running parameters of a bicycle having a sensor capable of reacting to a revolution of a rotationally movable member through a change of state and operating according to a cycle of changes of state, the sensor being provided to be mounted on a rotatable member of the bicycle, a transmission circuit having an antenna, a reception circuit having an antenna. The transmitting circuit has a circuit for calculating a value of the running parameter based on the signal originating from the sensor, a transmitter connected to the antenna to transmit this value to the receiving device, and an optimization circuit for activating the transmission of the transmitter to moments independent of the changes of state of the sensor.

Abstract: A rim structure for a bicycle wheel that includes, at its periphery, an annular channel designed to receive a tire, such channel being demarcated by an upper bridge devoid of openings with the exception of the valve opening, and two lateral flanges, such flanges having end butts for gripping the tire. The upper bridge has a narrow and recessed central rim well demarcated by a base and two lateral walls, the rim well being bordered by two bead seats that are oblique from the rim well towards the flanges. The invention is also related to a wheel having such a rim and a wheel equipped with a tire mounted without an air tube and having such a rim.

Abstract: A rim structure for a bicycle wheel that includes, at its periphery, an annular channel designed to receive a tire, such channel being demarcated by an upper bridge devoid of openings with the exception of the valve opening, and two lateral flanges, such flanges having end butts for gripping the tire. The upper bridge has a narrow and recessed central rim well demarcated by a base and two lateral walls, the rim well being bordered by two bead seats that are oblique from the rim well towards the flanges. The invention is also related to a wheel having such a rim and a wheel equipped with a tire mounted without an air tube and having such a rim.

Abstract: A transmission system provided for a bicycle, including a primary transmission sub-assembly having a set of rear sprockets, whose number of teeth, from one sprocket to the next sprocket in the ascending order, varies according to a ratio of the numbers of teeth that is greater than or equal to a value n such as n greater than 1. The invention also includes a control of the transmission system, as well as a bicycle that includes the transmission system and the control for same. The transmission system includes a single chain wheel for driving the chain, associated with a bottom bracket assembly, and a secondary transmission sub-assembly having at least two drive output ratios, whose ratio of the highest drive speed to the lowest drive speed is equal to a value R between 1 and n so as to introduce at least one intermediate transmission ratio between two successive sprockets.