Best Bike Helmets for Big Heads: Top 4 XL/XXL Helmets

Easily one of the biggest helmets in the world, the Quantum fits heads up to an impressive 66cm. You won’t find many helmets bigger than that, making it the perfect choice if you’ve been struggling for a long time. Bontrager market this helmet as offering “everything you need and nothing that you don’t”, so the emphasis is on safety and comfort.

MIPS (Multi-directional Impact Protection System) was developed alongside brain surgeons to reduce rotational forces acting on the brain after an angled impact. A tough, composite skeleton increases the helmet’s structural integrity and provides virtually unparalleled protection. The Crash Replacement Guarantee means a new helmet if you’re involved in a collision in the first year.

All that protection doesn’t come at the expense of comfort, though. The padding is soft and luxurious, while internal channels move air across your head, keeping you cool and preventing sweat build up. It also comes with a snap on visor, useful in sunnier weather but easily removed if not required.

Some helmets (especially larger ones) can be fiddly, but Bontrager has you covered here, too. The fit system is smooth and you can easily slip the helmet on and off/adjust it using just one hand.

The XXL version of Cratoni’s C-Stream is a massive, chunky helmet. Clocking in at up to 65cm it should fit even the largest of heads! Cratoni specifically markets this helmet for big heads, promising “optimal fit” no matter your size. It’s certainly comfortable, with no less than 14 ventilation openings and Clean Tex pads treated to prevent the formation of bacteria.

Safety is obviously paramount, and Cratoni has you covered. EPS material is foamed directly into the polycarbonate shell of the helmet, offering superior impact protection without compromising on comfort. There’s also a built in rear light (that can be turned on with a single click). The light is simple to operate and makes transitioning from day to night cycling as easy as the touch of a button.

Despite its stocky appearance, the C-Stream isn’t the heaviest on the list at 280g. Special RLS (Rapid Lock System) technology allows you to adjust the helmet via a rotating wheel on the back – this only requires one hand, so it’s perfect when you’re on the move. It even comes with insect protection at the front so you won’t have to worry about bugs ruining your ride! More than just an extra large helmet, the C-Stream is also extra safe and extra comfortable.

The Bell 4Forty MIPS helmets is one of the most stylish pieces out there. Its slick, streamlined design has a futuristic and unhindered look, and webbing around the air vents gives it an even cooler aesthetic. With a range of features suitable for every kind of ride, this is the quintessential “all rounder” helmet.

It has a tough, polycarbonate shell and MIPS offers additional protection against the most dangerous, angled impacts. A simple button and dial setup allow for easy size and adjustment on the move without having to stop: it’s fully one handed. Weighing in at 380 grams this is a mid range helmet in terms of weight.

Multiple vents will help you keep cool and there’s a removable visor too. You’ll struggle to find any helmets bigger than this, or many that offer better value for money. It’s the cheapest on the list but doesn’t skimp on protection or quality (it features that all important MIPS, something that you should look for on any helmet). 4XL is the biggest available but you can also opt for 3XL or 2XL, which are still bigger than most other helmets on the market!