Built for controlled core training that protects your lower back on the rollout the gym gear ab wheel pro combines a wide, curved wheel with an internal spring and braking mechanism, so you get resistance on the way out and a controlled return rather than a sudden drop. Control & safety internal spring mechanism adds resistance on rollout and assists the return integrated braking helps reduce the risk of overextension steel core construction supports up to 200kg 440lbs grip & stability curved, extra-wide rubber wheel improves balance through the movement anti-slip handles reduce hand fatigue during use specs weight: 5kg length: 30cm height: 30cm width: 30cm faqs is it safe for beginners the internal spring and braking mechanism are designed to add resistance and reduce overextension, making the rollout more controlled than a basic wheel. What's the maximum load it supports the steel core construction is rated to support up to 200kg 440lbs . Why is the wheel curved and wide it improves balance and stability through the rollout, including some side-to-side carving motion for the obliques. Browse more studio accessories.