Redcat list some of the spec's for the Ground Pounder but it seems a few are looking for more detailed information . More will be added as I have time.
Wheel Base 317 mm
Width 336 mm
Axle width 11'' inches hex to hex
Motor 20 turn 540
ESC waterproof Hobby wing WP-1040
Rim size is 3.2 inch and uses a 12mm hex . Basically Common rims that fit the E-Maxx and T-Maxx will fit if you use 14mm or 17mm wheel hex's there are lots of options . Most recommend the 3/4 inch stable maxx offset for additional tire clearance.
Tires are 3.2 inch inner diameter and 6.25 on there outer diameter.
Stock setup doesn't feature foam inserts in the tires
Transmission ratio's and possible wheel speed stock.
Differential Ratio: 3.30
Transmission Ratio: 1.68
Other Ratio: 1
Spur Tooth Count: 81
Pinion Tooth Count: 23
Total Voltage: 8.40
Motor KV: 3216
Tire Diameter (inches): 6.25
Top Speed (MPH): 25.73
Pinion and spur Pitch is standard 48 pitch and not mod.6 as stated on the stock replacement pinion.
The smallest pinion that can be use with the stock spur gear and without altering the stock adjustment channel is a 17 tooth pinion.