Tire specification in Google SketchUp:
Tread Width: 175 mm
Profile Height: 55 % (175*0.55=96.25 mm)
Wheel Diameter: R14 inches
Overall Tyre Diameter: 548 mm
Texture size: 256x256
Texture: 2 texture (one for tire tread and second for tire wall)
Texture format: .BMP
Segments: 24
For correct tire size i use
this calculator