Open, mud clearing tread design with ramped center knobs and aggressive shoulder knobs provide ample bite on loose soil and in corners Open, mud clearing tread design with ramped center knobs and aggressive shoulder knobs provide ample bite on loose soil and in corners TERRA - 3C Maxx Terra is softer and offers more traction than 3C Maxx Speed, yet provides better treadwear and less rolling resistance than Maxx Grip EXO - sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required WT - Wide Track casing optimized for rims over 35mm internal width