The Nitro-XLT Chassis is 2 inches longer and 2 inches taller than our standard champs. We tested both the Jr Sportsman and Sr Rage Nitro-XLT Champs during the 2022 racing season. The Jr Sportsman Rage Nitro-XLT Champ Kart still has the 40-inch wheelbase and the Sr Rage Nitro-XLT Champ Kart has a 42-inch wheelbase. The Nitro-XLT is in full production, but we have also built more than a few Razor XLT Champs. All parts on the Nitro, Cruizer, Razor Champs and XLT Champs are still interchangeable.