AGV K1 S Helmet vs ILM Z501 Full Face Motorcycle Helmet

The AGV K1 S is the better helmet for most riders: lighter, with a proven double-D retention system, a wide 190° visor and a strong record with owners. The ILM Z501 counters with a quick-release buckle, two visors and two fins in the box, and a slightly higher owner rating from a much smaller sample. Buy the AGV for fit, weight and long-term comfort; buy the ILM if you want the extra visors and a buckle you can open with gloves on.

• Choose the AGV K1 S if you want a light, race-derived full-face with a double-D strap, a wide field of view and a brand with a deep racing record.
• Choose the ILM Z501 if you want two visors and two aero fins included and prefer a quick-release metal buckle for daily on-off.