The YT Jeffsy CORE 3 29 is a do-it-all trail bike built to balance efficiency, control, and all-out fun. Its modern geometry and capable suspension deliver a planted, confidence-inspiring ride on technical descents while staying efficient and composed on the climb back up. Rolling on 29-inch wheels, the Jeffsy carries speed effortlessly through rough terrain and corners with predictability and control. Designed for riders who want one bike to handle long trail days, fast flow, and aggressive lines, the Jeffsy CORE 3 is a versatile trail machine that’s ready to push hard in any direction.