SPEED DETECTING DEVICE FOR MOTORCYCLE

摘要

PROBLEM TO BE SOLVED: To facilitate disposing of a brake disc and a detecting means to a space on the side of a spoke part of which a front wheel consists and hold the strength of a spoke part to a sufficient value. SOLUTION: A front wheel 5 comprises an axle pipe 21 supported at the lower part of a front fork 4 rotatively around an axis, and a spoke part 22 supported on the midway in the axial direction of the axle pipe 21 and supporting a rim 23 at its outer peripheral edge. A brake disc 43 is disposed closer to one end part 21a side in the axial direction of the axle pipe 21 than the spoke part 22 and rotated together with the axle pipe 21. A detecting means 29 to detect the rotation speed of the front wheel 5 comprises a signal rotor 31 disposed nearer the other end part 21b side of the axle pipe 21 than the spoke part 22 and rotated together with the axle pipe 21, and a magnetic sensor 30 disposed closer to the other end part 21b side of the axle pipe 21 then the spoke part 22 and positioned facing the signal rotor 31 in the radial direction of the axle pipe 21.