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Smith Optics Mainline

Smith Optics Mainline
  • Color: Matte Black
  • Color: White/Black
  • Color: Matte Slate / Fool's Gold / Terra
  • Color: Matte Bone Gradient
Please select options


Give credit where credit's due. Thank your mom, your legs, and your gear for giving you the opportunity to land that rocky gap. Made for going big, going fast, or both, the Smith Mainline is our pinnacle, downhill certified enduro bike helmet. Safety innovations like Koroyd™ and MIPS® provide energy-absorbing impact protection so you have the confidence to get aggressive on the trail. It doesn't matter if you're slaying the EWS in Whistler or suffering through the last stage of your local enduro race, you need a breathable, lightweight helmet that pairs well with goggles and fits like a glove. The Mainline integrates with your bike goggles for efficient venting and fog-free vision. Multiple pad sets including liners and neck-rolls let you customize the fit.

- Complete Koroyd® coverage for lightweight, energy-absorbing and ventilated impact protection
- MIPS® Brain Protection System reduces rotational forces caused by angled impacts to the head
- CPSC CE EN 1078, ASTM F1952 downhill, and NTA-8776 E-Bike certified

- Designed for ultimate integration with Smith performance goggles for maximum comfort, venting and storage convenience
- AirEvac™ ventilation system integrates with Smith goggles for fog-free lenses
- Three washable cheek pad kits, two crown liners and two neck rolls let you fine tune the fit
- D-ring chin strap fastener for a snug fit

- 21 fixed vents for consistent airflow
- Adjustable visor
- Hybrid X-STATIC® / Ionic+® anti-bacterial performance lining for odor resistance
- Weight (Size M, MIPS®): 27 oz / 770 g

CPSC, CE EN 1078, ASTM F1952

Part Numbers

Option UPC MPN Store SKU
Matte Black / Small 716736216850 E007429RX5155 SMI35258746M
Matte Black / Medium 716736216867 E007429RX5559 SMI36318238M
Matte Black / Large 716736216874 E007429RX5962 SMI35351749M
White/Black / Small 716736336503 E007423OD5155
White/Black / Medium 716736336510 E007423OD5559 MAI34981467M
White/Black / Large 716736336527 E007423OD5962 MAI33273678M
Matte Slate / Fool's Gold / Terra / Small 716736745473 E007420XI5155 MAI41883777L
Matte Slate / Fool's Gold / Terra / Medium 716736745480 E007420XI5559 MAI42682499M
Matte Slate / Fool's Gold / Terra / Large 716736745497 E007420XI5962 MAI41439720E
Matte Bone Gradient / Small 716736745442 E007420WR5155 MAI34845294L
Matte Bone Gradient / Medium 716736745459 E007420WR5559 MAI35424837M
Matte Bone Gradient / Large 716736745466 E007420WR5962 MAI34467433E