im running 22" holeshot XCT's on my 421 serval motor and it hooks up great. i have a +4 swingarm too. i ride trails, old back roads, fields, i dont do coal riding or anything. theres a old circle track that closed down near me called "tricity speedway" in dempsytown. me and my buddys go there and ride all the time, and ive never had a problem with to much wheel spin.
i think their a great tire for multiple riding types