Description 1. Offset: - 3mm & +1mm ( +1mm offset: similar with original axial scx24 wheel offset; - 3mm offset: increased spacing between hubs for added stability. Put center part in shallow room offset is +1mm, in deep room offset is - 3mm ) 2. Material: Aluminum Wheel + Stainless Steel Middle Ring 3. Wheel diameter: 27.5mm (1.08inch) 4. Wheel Width: 16mm (0.63inch) 5. Wheel hex: 7mm 6. Weight: about 21.3g/wheel (Stainless Steel Middle Ring to adds the perfect weight need and help the mini crawler performance.) 7. Axle Through Hole Dia.: 2.4mm (0.094inch) 8. Color: Black & Champagne Color