Abstract: A wheel-type resistance device includes a flywheel which is rotated together with a hub member around an axle and which has an accommodation chamber indented axially to form a first circumferential portion that extends in a radial direction relative to the axle. A plurality of magnetically attractive members have magnetically permeable members thereon and are angularly displaced on the first circumferential portion. A dragging force adjusting member is mounted on the axle and is shiftable in the axial direction. The adjusting member has a left major surface with a second circumferential portion opposing the first circumferential portion for mounting a plurality of magnets so that the magnets will be drawn by the magnetically attractive members through the permeable members when the flywheel rotates. A shifting member is operable to shift the adjusting member away from the flywheel so as to decrease the dragging force imposed upon the rotation of the flywheel.

Abstract: A wheel-type resistance device includes a flywheel rotated with a hub member around an axle and having an accommodation chamber with a first circumferential portion extending in a radial direction and provided with a plurality of magnetically attractive members. A dragging force adjusting member is mounted on the axle and has a second circumferential portion registered with the first circumferential portion. Upper and lower magnetic members are disposed movably on the second circumferential portion and are spaced apart from and are in symmetry with each other relative to a horizontal line transverse to an axial direction defined by the axle. A cam member is mounted rotatably on the axle. A pair of cam followers are disposed respectively on the upper and lower magnetic members and are moved by the cam member such that counterclockwise rotation of the cam member will impart linear movements of the upper and lower magnetic members towards the horizontal line.

Abstract: A wheel-type resistance device includes a flywheel rotated with a hub member around an axle and having an accommodation chamber with a first circumferential portion which is provided with a magnetically attractive member. A dragging force adjusting member is mounted on the axle and has a second circumferential portion registered with the first circumferential portion. Upper and lower magnetic members are disposed movably on the second circumferential portion and are spaced apart from and are in symmetry with each other relative to a horizontal line transverse to an axial direction defined by the axle. Linear movement of the upper and lower magnetic members toward the horizontal line along a transverse direction relative to the horizontal line is actuated by an actuating member so as to decrease the extent of overlapping of the upper and lower magnetic members with the second circumferential portion.