Scalable to your preferred size. Models shown are 1/50 scale. Might work on 1/64 scale, Defenetly will work on 1/50 or larger scale files (such 1/48, 1/43, 1/35, 1/25, 1/24 etc)

in 1/50 scale is 48 mm wide, usable on a larger post war trucks. Wheel arch is D22 for larger wheels.

Smaller version for pre war trucks available, 44 mm wide (with same chassis width to fit my cabs) and smaller arch diameter (D20) to fit smaller wheels