Learn about Auto Services | Find an Auto Care CenterThe Carlisle Farm Specialist R-1 HA is an AG and construction tire with a classic high angle, 45 degree straight bar tread with a long bar design. Carlisle agriculture and construction tires are well known workhorses in the industry. AG/Construction. FARM SPECIALIST F-2. Triple rib front tire.Improved steering in loose soil with this triple rib front classic.