Skip to main content

Smith Optics Mainline

Smith Optics Mainline
  • Color: Matte Amethyst/Bone
  • Color: AC Iago Garay
  • Color: Matte Black
  • Color: Matte Cinder Haze
  • Color: Matte Bone Gradient
  • Color: Matte Spruce/Safari
  • Color: White/Black
  • Color: Matte Slate/Fool'S Gold/Terra
  • Color: Matte Stone/Moss
$300.00 - $400.00
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.

PROTECTION: 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

FIT / INTEGRATION: 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, 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

FEATURES: 21 fixed vents for consistent airflow, Adjustable visor, Hybrid X-STATIC / Ionic+ anti-bacterial performance lining for odor resistance

WEIGHT: (Size M, MIPS) 27oz / 770g


SizeHead Circumference
X-Small 48-52cm
Small 51-55cm
Medium 55-59cm
Large 59-62cm
X-Large 61-65cm

CPSC, CE EN 1078, ASTM F1952

Part Numbers

Option UPC MPN Store SKU
AC Iago Garay / Small 716736336411 E007423585155 MAI21120019Y
Matte Amethyst/Bone / Small 716736745411 E007420WP5155 MAI34187686L
AC Iago Garay / Medium 716736336428 E007423585559 MAI21554261Y
Matte Amethyst/Bone / Medium 716736745428 E007420WP5559 MAI35547055M
AC Iago Garay / Large 716736336435 E007423585962 MAI21481144Y
Matte Amethyst/Bone / Large 716736745435 E007420WP5962 MAI34741869E
Matte Black / Small 716736216850 E007429RX5155 MAI12318074S
Matte Black / Medium 716736216867 E007429RX5559 MAI12930780S
Matte Black / Large 716736216874 E007429RX5962 MAI12655157S
Matte Cinder Haze / Small 716736336442 E007423K45155 MAI12295695S
Matte Cinder Haze / Medium 716736336459 E007423K45559 MAI12247633S
Matte Cinder Haze / Large 716736336466 E007423K45962 MAI12538009S
Matte Spruce/Safari / Small 716736336473 E007423L45155 MAI27434273I
Matte Spruce/Safari / Medium 716736336480 E007423L45559 MAI27506538I
Matte Spruce/Safari / Large 716736336497 E007423L45962 MAI247823302
White/Black / Small 716736336503 E007423OD5155 MAI17647225E
Matte Bone Gradient / Small 716736745442 E007420WR5155 MAI34939537L
White/Black / Medium 716736336510 E007423OD5559 MAI17422481E
Matte Bone Gradient / Medium 716736745459 E007420WR5559 MAI35946101M
White/Black / Large 716736336527 E007423OD5962 MAI17840895E
Matte Bone Gradient / Large 716736745466 E007420WR5962 MAI34239529E
Matte Slate/Fool'S Gold/Terra / Small 716736745473 E007420XI5155 MAI41604542L
Matte Slate/Fool'S Gold/Terra / Medium 716736745480 E007420XI5559 MAI42703779M
Matte Slate/Fool'S Gold/Terra / Large 716736745497 E007420XI5962 MAI4185714E
Matte Stone/Moss / Small 716736752761 E007420XL5155 MAI3162453L
Matte Stone/Moss / Medium 716736752778 E007420XL5559 MAI32572906M
Matte Stone/Moss / Large 716736752785 E007420XL5962 MAI31306675E