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The Thor Sector Chev Helmet is a lightweight motocross and off-road helmet designed to deliver dependable protection, ventilation, and comfort at an accessible price point. Its injection-molded polycarbonate/ABS shell, dual-density EPS liner, adjustable visor, and moisture-wicking interior make it a versatile choice for trail, motocross, and off-road riding.
- Injection-molded polycarbonate/ABS shell
- Dual-density EPS liner with extensive ventilation
- Fully adjustable vented visor helps reduce lift
- Removable and washable moisture-wicking liner
- Flexible rubber nose piece
- High-flow mouth vent with intake filter
- Rear shell shape helps keep the goggle strap positioned securely
- DOT and ECE 22.05 certified
- Designed for motocross, trail, ATV, and off-road riding
Thor Adult Helmet Size Chart
| Size | US Hat Size | Head Circumference | Metric |
|---|---|---|---|
| X-Small | 6 5/8-6 3/4 | 20 7/8-21 1/4 in. | 53-54 cm |
| Small | 6 7/8-7 | 21 3/8-22 in. | 55-56 cm |
| Medium | 7 1/8-7 1/4 | 22 1/8-22 7/8 in. | 57-58 cm |
| Large | 7 3/8-7 1/2 | 23 1/2-23 7/8 in. | 59-60 cm |
| X-Large | 7 5/8-7 3/4 | 24-24 1/2 in. | 61-62 cm |
| 2X-Large | 7 7/8-8 | 24 5/8-25 1/2 in. | 63-64 cm |
| 3X-Large | 8-8 1/8 | 25 5/8-26 in. | 65-66 cm |
| 4X-Large | 8 1/4-8 3/8 | 26 3/8-26 3/4 in. | 67-68 cm |
How to Measure: Wrap a soft measuring tape around the widest part of the head, just above the eyebrows and ears. Keep the tape comfortably snug, repeat the measurement, and use the largest result.
Fit Note: A motocross helmet should fit securely around the crown and cheeks without painful pressure points or excessive movement. Do not intentionally size up for a loose fit.
The interactive size finder uses head circumference in inches to recommend the appropriate helmet size.