An 8.00x6 with a sporty 21 inch outside diameter.
 
Diameter - 21 inches
Width - 7.5 inches
Tread depth - 6mm
Weight - 4.8kg
Rating - 363kg (at 25psi), 61kts (max roll speed)
 
Can be fitted tubeless or with tube. 4 ply rating with full 6mm tread depth..
 
Tube options
Aero Classic 700/800-6 Aviation Grade with TR20 straight or TR87/70 bent stem
*TR87/70 best tube for offset drilled Savannah wheel