Rear wheel hub

Tensile strength≥230MPa, elongation≤2%

Front wheel hub

Tensile strength≥230MPa, elongation≤2%

Shoe block

Wall thickness≥3mm, reinforcing rib thickness≥4mm

Chain wheel

Number of teeth:38, thickness:7.2mm, concentricity≤1.0, hardness:HRC28-32

Front/rear axle

1. 16CrMo4 material; 2. Front axle: Φ12.2×186, rear axle: Φ15×230; 3. Front axle housing: Φ12.2×Φ21×24, rear axle housing (rightΦ15.2×Φ25×34.5. LeftΦ15.2×Φ28×18.5). Note: the axle housing is chromium-plated part.

Dust cap

Chromium-plated

Chain adjuster, jump ring

The distance between the hole center to the end part of the chain adjuster is 75mm

Rear side cover

Tensile strength≥230MPa, elongation≤2%

Front side cover

Tensile strength≥230MPa, elongation≤2%, the fit clearance between the antislip groove and shock absorber is 0.3mm~0.5mm. The hole diameter to install the front brake cable is Φ9.5mm.

Front/rear rocker arm

Chromium-plated, the lever pin hole: Φ12.3. The distance between the center of lever pin hole and center of rocker arm: front wheel 90±5mm, rear wheel 113±5mm.

Camshaft

Thickness of working surface: 6mm. the surface is chromium-plated.