Best I could find for an aggressive 9R22.5 is a new good year, design I have not seen yet, but is supposed to be about like the G171 19.5 tire.

Then there is a Yokohama tire that is similar, but perhaps a little better.

What would be nice are some Michelin XL, XML, XZL military tires, but not available in 22.5" size.

I did see some Firestone's that were 10 or 11R22.5, and really really rough, about like the Michelin's, but looked a little better.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-