A good helmet should be the last thing you notice during a ride. It should fit securely, stay in place and match the conditions you ride in. Color and weight matter, but neither can compensate for the wrong size or an incorrect adjustment.
Measure before trying a helmet
Measure around the widest part of your head, roughly two fingers above the eyebrows, and compare the result with the manufacturer's chart. Helmets with the same nominal size can use different shapes. Try the helmet on and check for pressure points at the forehead and temples.
Make the three basic adjustments
The front edge should sit level and low enough to protect the forehead without blocking vision. Adjust the rear cradle so the helmet does not move when you turn your head. The side straps should meet just below the ears, and the chin strap should allow one or two fingers of space.
Standards and MIPS
Check the current safety standard on the inside label. MIPS and similar systems add a layer intended to reduce certain rotational forces in some impacts, but they do not replace a proper fit. Independent testing can help compare models, yet the helmet must still match your head and riding conditions.
When to replace it
Replace a helmet after a serious impact or when you see cracks, crushing or damaged straps. Follow the manufacturer's service-life advice even when there is no visible damage. Do not drill the shell or attach hard accessories in a way that changes its structure.
