These trimmed down Cheetahs come in at 77mm tall by 60mm wide with the same 3-part construction as the Dual-Duro Cheetahs. They have a fiberglass reinforced core, an inner urethane pour in either 85a or 90a and a super grippy 76a outer tread urethane. Rather than having two flexible lips, they have a stiff 90-degree inner lip to prevent deformation of the wheel and give you ridiculous straight-line performance. The outer lip has a more aggressive angle in it to give you the edge grip you need in the corners. These wheels are also more offset than the original Cheetahs, this combines with the narrow contact patch and stiff inner lip to give you a wheel with the super smooth, controlled drifts you want for a day out skating with your friends. Warning: The Dual-Duro Lean Cheetah wheels are FAST!