Wheel radius is 30, not 60mm!
Wheel radius is 30, not 60mm!

Signed-off-by: tom <3abfbc22eec6ecd173d744487905db1fa6a502d5@gmail.com>

ApproxEng/viridia,ApproxEng/viridia,ApproxEng/viridia,ApproxEng/viridia