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A tricycle comprises an upright handlebar, a front wheel frame, two expandable footboard support rods, and two braking devices. The front wheel frame is fastened with the bottom end of the upright handlebar and is provided with an elongated hole for locating a front wheel axle. The two expandable fo

A tricycle comprises an upright handlebar, a front wheel frame, two expandable footboard support rods, and two braking devices. The front wheel frame is fastened with the bottom end of the upright handlebar and is provided with an elongated hole for locating a front wheel axle. The two expandable footboard support rods are jointly fastened with the upright handlebar by a lashing member. The braking devices comprise a rotary support rod, and a braking rod which is fastened at one end with a brake cable and is provided at other end with a braking portion capable of being forced against a rear wheel at the time when the braking rod is activated by the brake cable.

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1. A tricycle operated by torsion thereof, said tricycle comprising: a steering rod formed of a horizontal handlebar and an upright handlebar; a front wheel frame fastened pivotally with a bottom end of said upright handlebar for mounting a front wheel by an axle, said front wheel frame provided

1. A tricycle operated by torsion thereof, said tricycle comprising: a steering rod formed of a horizontal handlebar and an upright handlebar; a front wheel frame fastened pivotally with a bottom end of said upright handlebar for mounting a front wheel by an axle, said front wheel frame provided with two elongated holes which are opposite in location to each other and are provided with a plurality of locating portions for locating said axle in said elongated holes; two footboard support rods, each being formed of an inner tube and an outer tube slidably fitted over said inner tube in conjunction with a locking ring, said inner tube being provided at a front end with a slot which is provided in side walls thereof with a plurality of fastening holes, said outer tube being provided at a rear end with a footboard fastened therewith and a rear wheel frame pivoted thereto for mounting a rear wheel; a lashing member formed of a lashing seat, two side plates, and a connection rod, said lashing seat being fastened with said upright handlebar, said two side plates being fastened at one end with said lashing seat such that other end of said side plates is fastened with said connection rod, said other end of said side plates being provided with a projection extending therefrom and having a plurality of fastening holes whereby said lashing member is fastened with said two footboard support rods such that said projection of said two side plates of said lashing member is fitted into said slot of said inner tube of said footboard support rods in conjunction with a plurality of fastening bolts which are received in said fastening holes of said projection and said fastening holes of said side walls of said slot; and two braking devices, each being mounted at the rear end of said outer tube and formed of a rotary support rod and a braking rod pivoted with said rotary support rod such that one end of said braking rod is fastened with a brake cable, said braking rod being provided at other end with a braking portion whereby said braking portion of said braking rod is forced against said rear wheel at such time when said braking rod is actuated by said brake cable.