Which is safer, the AGV K1 S or the ILM Z501?

The AGV K1 S carries ECE 22.06 as well as DOT, while the ILM Z501 lists DOT and FMVSS-218 only. ECE 22.06 is the newer standard with rotation and impact testing added. On paper the AGV has the stronger certification.

Is the AGV K1 S worth about $66 more than the ILM Z501?

If you ride at speed or on track, yes: you get ECE 22.06, a four-density EPS liner, two shell sizes and a Double D strap. For low-speed commuting on a tight budget, the ILM covers the basics at $129.99.

Which helmet is better for glasses wearers?

Both list glasses-friendly interiors. The AGV's Dry-Comfort liner is shaped around glasses and comes out for washing. The ILM lists an eyeglasses-compatible design but gives no liner shape detail.

Does either helmet come with a Pinlock insert?

No. The AGV K1 S takes a Pinlock 70 MaxVision insert, sold separately. The ILM Z501 does not list Pinlock support.

Which has the easier buckle?

The ILM Z501 uses a metal quick-release buckle, which is faster to fasten and release. The AGV K1 S uses a Double D strap, which takes longer but is the track-standard fastening.

Neither maker states a service life. Replace any helmet after a crash or about five years of use. The AGV's removable, washable liner and replaceable visor make it easier to keep in good condition.

AGV K1 S Full Face Motorcycle Helmet vs ILM Z501 Full Face Motorcycle Helmet

Buy the AGV K1 S if you ride hard, want a track-style Double D strap and the newer ECE 22.06 approval. Buy the ILM Z501 if budget is the deciding factor and you want a quick-release buckle and a mirrored visor option. The AGV is $195.60 at Amazon as of November 4, 2026; the ILM is $129.99 at ilmotor.com as of the same date, a gap of about $66.

Today the ILM Z501 Full Face Motorcycle Helmet costs $65.61 less at its best price.

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