A vehicle body frame structure of a straddle-type vehicle comprises a head pipe into which a steering shaft connected to a handle is inserted; and a pair of main frames extending rearward and outward in a vehicle width direction from the head pipe in such a manner that the main frames are spaced apart from each other in the vehicle width direction. Each of the main frames includes an upper frame extending rearward from an upper portion of the head pipe, and a lower frame extending rearward from a lower portion of the head pipe. Between the upper frame and the lower frame, a retraction space which is located inward in the vehicle width direction relative to an end portion of the handle in a turn operation state is provided.

A vehicle body frame structure of a straddle-type vehicle comprises a head pipe into which a steering shaft connected to a handle is inserted; and a pair of main frames extending rearward and outward in a vehicle width direction from the head pipe in such a manner that the main frames are spaced apart from each other in the vehicle width direction. Each of the main frames includes an upper frame extending rearward from an upper portion of the head pipe, and a lower frame extending rearward from a lower portion of the head pipe. Between the upper frame and the lower frame, a retraction space which is located inward in the vehicle width direction relative to an end portion of the handle in a turn operation state is provided.

A method of evaluating data in a database, the method including causing a workstation to display a graphical user interface which a user can use to create a screening rule by defining at least one screening condition and by entering a score, whether the score is applied to evaluate data in the database if the screening condition is met, whereby no knowledge of a programming language is required to create the screening rule. Other systems and methods are also provided.

A linkage front wheel suspension system for two-wheeled vehicles comprising of a control arm hinged with the body of the vehicle, fork member, and steering member. An upper ball joint connects said steering member to the body of the vehicle and a lower ball joint connects the outer end of said control arm with said fork member. Fork member extends upwards and rearwards from said lower ball joint to hinge with said steering member. Steering member extends upwards and forwards from this pivot point to said upper ball joint. A method of steering control connects with said steering member. Means of springing/dampening connects with at least one of the said steering/suspension members. Said suspension system can utilize a lighter design of main frame, provide superior road-holding and can have reduced compression when front wheel braking.

A linkage front wheel suspension system for two-wheeled vehicles comprising of a control arm hinged with the body of the vehicle, fork member, and steering member. An upper ball joint connects said steering member to the body of the vehicle and a lower ball joint connects the outer end of said control arm with said fork member. Fork member extends upwards and rearwards from said lower ball joint to hinge with said steering member. Steering member extends upwards and forwards from this pivot point to said upper ball joint. A method of steering control connects with said steering member. Means of springing/dampening connects with at least one of the said steering/suspension members. Said suspension system can utilize a lighter design of main frame, provide superior road-holding and can have reduced compression when front wheel braking.

A three-piece stem of a bicycle includes a stem body, a bottom pipe, and a middle element. A first torus portion and a second torus portion are disposed at two ends of the stem body, respectively. The bottom pipe is disposed in the second torus portion of the stem body. The middle element is disposed between the second torus portion of the stem body and the bottom pipe. A connecting element couples the second torus portion of the stem body, the bottom pipe, and the middle element together, such that the second torus portion of the stem body, the bottom pipe, and the middle element are fixed tightly to a front forked upright pipe collectively, thereby enhancing the ease of assembly and the binding strength upon completion of assembly.

A three-piece stem of a bicycle includes a stem body, a bottom pipe, and a middle element. A first torus portion and a second torus portion are disposed at two ends of the stem body, respectively. The bottom pipe is disposed in the second torus portion of the stem body. The middle element is disposed between the second torus portion of the stem body and the bottom pipe. A connecting element couples the second torus portion of the stem body, the bottom pipe, and the middle element together, such that the second torus portion of the stem body, the bottom pipe, and the middle element are fixed tightly to a front forked upright pipe collectively, thereby enhancing the ease of assembly and the binding strength upon completion of assembly.

To achieve steering angle adjustment on a steering part side and a front wheel side, a positioning structure includes: a first engagement part for engaging the steering part and a body frame with each other at a first steering angle that is an angle about a first steering axis at the time of assembling the vehicle; a second engagement part for engaging a fork and a fork holder at a second steering angle that is an angle about a second steering axis at the time of assembling the vehicle; and a linking mechanism for linking the first engagement part and the second engagement part to each other. The linking mechanism is provided with a steering adjusting mechanism for putting the first engagement part into engagement by adjusting the first steering angle and for putting the second engagement part into engagement by adjusting the second steering angle.

To achieve steering angle adjustment on a steering part side and a front wheel side, a positioning structure includes: a first engagement part for engaging the steering part and a body frame with each other at a first steering angle that is an angle about a first steering axis at the time of assembling the vehicle; a second engagement part for engaging a fork and a fork holder at a second steering angle that is an angle about a second steering axis at the time of assembling the vehicle; and a linking mechanism for linking the first engagement part and the second engagement part to each other. The linking mechanism is provided with a steering adjusting mechanism for putting the first engagement part into engagement by adjusting the first steering angle and for putting the second engagement part into engagement by adjusting the second steering angle.

A shock absorber has an inner tube embedded in a steering stem shaft and an outer tube provided slidably. A front fork is fixed to a lower end of the outer tube, and the inner tube is fixed to an upper end of the steering stem shaft. The steering stem shaft is provided with a guide trench extending in a telescoping direction and having a long hole shape. A roller bearing is provided on an outer circumferential surface of the outer tube and is inserted into the guide trench movably along the guide trench. As a result, relative movement between the steering stem shaft and the outer tube in the telescoping direction is permitted while relative rotation is restricted.