4Pcs Shock-proof Crush-resistant 1/10 Run-flat Car tire Hubs for Traxxas HSP Tamiya HPI Kyosho RC Model Car. 

Description: 
4Pcs/Set 1/10 Run-flat Car Tire Hubs 
Material: Plastic 
Color: Silvery 
Tire Weight: 11g/1pcs 
Shock-proof 
High Crush-resistant 
Suit for Traxxas HSP Tamiya HPI Kyosho RC Model Car 

Parameter: 
Wheel Rim outer Diameter: 52mm 
Wheel Rim inner Diameter: 45mm 
Wheel Rim width: 26mm 
Wheel Rim Drive Hex: 12mm 
Nut Fixed Hole: 4mm 
Tire Material: Plastic 
Note: there's some little error from human measuring. 

Package information: 
Package size: 11 * 11 * 3 cm / 4.3 * 4.3 * 1.1 in 
Package weight: 48.5g / 1.7 oz 

Package list: 
4 * Run-flat Car Tire Hubs