Giro Coalition Spherical

$469.99 Sale Save
Color Matte Black
Size Medium

Giro Coalition Spherical lightweight fullface bike helmet

Big Trail Protection - All Day Comfort

Only Giro could design an impressively lightweight full-face helmet that still provides heavyweight protection. Just 800 grams in M/L, this NTA-certified MTB helmet still packs the punch of Spherical Technology™ powered by Mips® while Progressive Layering with EPP and EPS foam optimizes management of both high-speed and low-speed impacts. Coalition Spherical delivers best-in-class cooling power by pairing massive front intake ports with efficient rear exhaust vents via deep internal channeling. Coalition's most impressive innovation lies hidden inside: the patent-pending Halo System combines a chinbar with Pebax® (a material that is engineered to provide the perfect range of flex and rigidity) and elastomeric bushings that are integrated into the EPS to absorb and dissipate kinetic forces. The result is a helmet that exceeds standard chinbar deflection certification testing by almost 2x. Comfort is maximized with the DryCore™ sweat management brow pad, IONIC+™ treatments to control odor, and two sets of removable cheek pads to help fine-tune fit. The

Coalition Spherical sets a new benchmark for lightweight full-face protection.


  • Spherical Technology™, powered by Mips®
  • Polycarbonate shell 
  • Halo Chinbar System 
  • Fidlock® Buckle
  • Certifications: NTA, Complies with the US CPSC Safety Standard for 
  • Bicycle Helmet for Persons Age 5 and Older, ASTM-1952-DH, 
  • ASTM-2032-BMX, EU: CE EN1078, AS/NZS

In-Mold construction

Comfort Liner/Neck Roll/25mm & 30mm cheek pads

update to 23 vents

XS/S 20-21.75” / 51-55cm
M/L 21.75-23.25” / 55-59cm
XL/XXL 23.25-24.75” / 59-63cm