Cube Kids Helmets

Safety Tech and Construction: Built for the Bumps

The foundation of every Cube children's helmet is in-mould construction - a process where the tough polycarbonate outer shell is fused directly to the EPS foam inner during manufacturing, rather than pressed together afterwards. The result is a shell that is noticeably lighter than a comparable injection-moulded lid, with no weak layer junction between the two. For a child crashing at low speed on a school-run kerb or high speed on a trail descent, that structural integrity is what does the work.

Front vents on most models are fitted with fine insect nets, a small detail that makes a big difference once you are riding wooded trails in summer. Nobody wants a wasp inside their helmet. The nets clip out for cleaning, which you will need if your child eats a muddy berm.

Cube distributes ventilation channels to balance airflow without leaving a wide-open gap between the shell edges - so coverage stays solid around the sides and rear where it counts. If your child is progressing towards bike parks or more aggressive descending, the open-face range covered here will not be the right tool - our Bell kids helmets and Met kids helmets categories include full-face options worth a look at that stage.

Understanding the Cube Fit System and Range

Getting the fit right is the one thing that separates a safe helmet from an expensive hat. Cube's SNAP 360 fit system uses a rear dial that tightens a cradle around the back and sides of the skull in small, precise increments. You can do it one-handed, through a winter hat, and with a wriggling child - which is roughly the real-world test. The system accommodates a meaningful range of head circumferences within each size bracket, so you are not immediately buying the next size up when they hit a growth spurt in January.

Toddler-specific models are shaped with a flatter rear profile, designed to sit comfortably against a child seat or trailer headrest without tipping the helmet forward over their eyes. Youth MTB models shift to deeper rear coverage and a slightly more aggressive profile that suits a forward riding position on trail bikes. Knowing which category your child falls into before you buy saves a return trip. Pair the right helmet with a Cube kids bike and the geometry and fit philosophy carry through the whole setup.

Cube children's cycling helmets are sized roughly as follows: toddler models typically cover 46 - 52 cm head circumferences, junior models from around 51 - 56 cm, and youth models running up to 59 cm with the dial doing the fine work within those bands. Always measure first - more on that in the FAQ below.

For sizing comparison across other brands on the market, Giro kids helmets use a broadly similar dial-adjust approach, so if you have used one before, the Cube system will feel familiar.

Visibility and UK Riding Conditions

UK riding conditions do not always play fair. A dry October morning can turn to drizzle by the time you reach the school gate, and winter commutes are often done entirely in the dark. Cube addresses this practically: a number of Cube youth MTB helmet models integrate an LED rear light directly into the fit dial housing at the back of the helmet. It runs on a small rechargeable or replaceable cell, blinks in a pattern that draws the eye, and is always at the right position on the head regardless of how the rider is sitting up or hunched over the bars. Useful on roads; more useful than you might think on shared-use paths.

Reflective details are printed or stitched into the shell graphics on most models in the range, adding 360-degree passive visibility that requires nothing from the rider. It is not a substitute for active lighting on unlit roads, but it adds meaningful presence in headlights and street lighting. If you want to build out a proper lighting setup beyond the helmet, our Cube lights range is worth pairing in.

Ventilation on Cube's children's helmets is balanced rather than maximised. There are enough channels to prevent overheating on a humid summer climb through the woods, but the vent geometry does not leave the foam so exposed that a brisk November school run turns unpleasant. A thin cycling cap or buff under the helmet handles the coldest days without fighting the fit dial - the SNAP 360 system has enough range to accommodate the extra layer. For muddy school-run days, Cube mudguards fitted to the bike will save the helmet from the worst spray off the rear wheel.