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Giro Eclipse Spherical
Model: Eclipse Spherical Helmet, US style 100000000300000136 · US configuration
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An assessment scenario for an adult road rider with a measured 57 cm circumference who wants a documented Spherical/Mips design. Giro describes the Eclipse Spherical for road and gravel racing and lists S/M/L over a 51–63 cm chart screen; try on the exact model rather than treating this as a fit verdict.
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Assessment scenario: Adult road ride with a Spherical design
An assessment scenario for an adult road rider with a 57 cm measured circumference who wants Giro's documented Spherical/Mips design. A size-chart match is a reason to try the exact helmet on, not proof of fit or injury protection.
Explore this buying guide ↗Why consider this model?
- Giro identifies current US style 100000000300000136 for road and gravel racing and documents an aero-focused shell, Spherical Technology powered by Mips and deep internal channels.
- The exact product page lists S/M/L; Giro’s adult chart maps those sizes across 51–63 cm, which includes the scenario’s 57 cm measurement for screening only.
- The exact page describes 14 Wind Tunnel vents and gives a 270 g Medium figure; these are manufacturer specifications rather than independent airflow or weight measurements.
Tradeoffs to weigh
- The exact current style page lists CE EN 1078 but no CPSC statement. Virginia Tech’s 2023-tested Eclipse Spherical record lists CPSC but does not identify style 136, so current exact-version CPSC evidence remains unknown.
- Giro’s page uses both Roc Loc 5 Air and Roc Loc 5.5 Air wording for the fit system; the exact generation is unresolved, although fit-tension and fore-aft adjustment are described.
- Aero design, vent count and Spherical construction do not prove a speed, cooling, fit or injury-outcome result for an individual; no hands-on or independent aero testing was performed.
Check these before ordering
- Confirm the seller offer is Eclipse Spherical US style 100000000300000136, not Eclipse Pro or another family; the observed Matte Black/White/Bright Red route exposed SKU GR-7141325.
- Check the selected S/M/L size and try it on using Giro’s instructions; a 57 cm chart intersection does not establish head shape or secure personal fit.
- Inspect the physical helmet’s CPSC marking and documentation. Do not transfer Virginia Tech’s 2023-tested model entry to current style 136 or treat CE EN 1078 as the same evidence.
- Check the exact fit adjuster wording and the contents/return terms for the actual offer, and review current Giro recall notices before buying.