Wanted: tires; 11:00-16

[Jack Innes]

The original tires on the Ram amphibian have sipes cut into the ND tread. This was done as part of the prototype development for better control on wet pavement. Probably in desperation when they found that the truck will go 70 mph!
You see some truck tires marked "regroovable" which would indicate the process is still done. I have not tried it but perhaps a router would do the job.