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Frequently Asked Questions
Spherical Technology is Giro's ball-and-socket helmet design, powered by Mips. The outer liner rotates around the inner liner in a crash, which Giro says redirects energy away from the brain in certain impacts. We stock it in the Giro Aries Spherical, Helios Spherical, Eclipse Pro, Manifest Spherical, Montaro Pro, Coalition Spherical and Insurgent Spherical.
Measure around your head with the tape level from front to back. Giro's adult bike helmet guide puts S at 51-55 cm, M at 55-59 cm and L at 59-63 cm. The Giro Fixture MIPS II comes in Universal Adult for 54-61 cm and Universal XL for 58-65 cm, and the Isode MIPS II in one Universal Adult size for 54-61 cm.
The Giro Scamp II and Scamp MIPS II are Giro's smallest helmets: XS fits 45-49 cm heads from age 1 and S fits 49-53 cm from age 5. The Tremor Child and Tremor MIPS Child are one size for 47-54 cm, the Fixture II Youth fits 50-57 cm from age 5, and the skate-style Dime and Dime MIPS come in XS and S.
Giro bike helmets we stock
• Road and gravel: theGiro bike helmets we stock
• Road and gravel: the Aries Spherical (DryCore brow pad, Roc Loc 5+ Air fit), the Helios Spherical (270 g in M), the aero Eclipse Pro, the Cielo MIPS, Agilis MIPS, Syntax MIPS (S to XL) and Isode MIPS II (one size, 54-61 cm).
• Trail mountain bike: the Montaro Pro and Montaro MIPS III, the Manifest Spherical, the Source MIPS, the Artex MIPS and the Fixture MIPS II, which also comes without Mips and in women's and youth versions.
• Full face: the Coalition Spherical with its Halo System chinbar, and the Insurgent Spherical for gravity riding, with a fibreglass shell.
• Kids and skate-style: the Scamp MIPS II and Scamp II, Giro's smallest helmets, the Tremor MIPS Child and Tremor Child, the Dime MIPS and Dime, and the adult Quarter MIPS and Quarter.
How to choose a Giro helmet
Spherical or Mips. Giro's Spherical Technology is a ball-and-socket design powered by Mips: the outer liner rotates around the inner liner in a crash, which Giro says helps redirect impact forces away from the brain. Most other Giro helmets here have integrated Mips or Mips Evolve Core. The Fixture II (adult, women's and youth), Quarter, Dime, Scamp II and Tremor Child are the versions without Mips.
Size. Giro's adult guide puts S at 51-55 cm, M at 55-59 cm and L at 59-63 cm. Measure around your head with the tape level from front to back. Universal-fit helmets such as the Fixture MIPS II and Isode MIPS II use one shell and a Roc Loc Sport dial with 7 cm of adjustment; Giro introduced its first Roc Loc fit system in 1994.
Riding. On the road, the Eclipse Pro is Giro's aero race helmet, the Aries Spherical is the one Giro describe as lighter, cooler and sleeker, and the Helios Spherical covers road and gravel. On trails, the Manifest Spherical and Source MIPS give deep coverage and a moto-style visor. For a chinbar, choose the lightweight Coalition Spherical or the Insurgent Spherical, built for gravity riding.
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