Trek Rally WaveCel MTB Cycling Helmet

The Trek Rally WaveCel is designed specifically for off-road adventures, combining advanced safety tech with rider-focused features. At its heart is WaveCel, Trek’s exclusive collapsible cellular structure that works like very much like the MIPS protection system, with a crumple zone to absorb impact energy before it reaches your head. It’s a step beyond traditional helmet safety, and once you’ve experienced it, you won’t want to ride without it.

Key Features:

• WaveCel advanced safety technology – absorbs impact forces more effectively than traditional foam-only helmets.
• BOA® Fit system – secure, micro-adjustable fit with just one hand.
• Extended drop-in coverage – extra protection around the back of the head.
• Adjustable visor – multiple positions for sun and trail conditions.
• LockDown strap dividers – simple, tangle-free strap management.
• Moisture-wicking helmet pads – soft, washable, and built for long rides.
• Crash Replacement Guarantee – free replacement if your helmet is involved in a crash within the first year.
• Not compatible with Blendr magnetic mount system it would be suitable with; a standard Bontrager Helmet Mount (velcro) 

Built for the Trail

The BOA® Fit system makes on-the-fly adjustments effortless, while the extended shell design provides increased rear coverage for added confidence on technical trails. With lightweight strap dividers and plush, sweat-wicking pads, this helmet feels just as good on all-day rides as it does on quick evening blasts.

Drop-in Coverage

The helmet’s extended back-of-shell design offers extended coverage around the rear of your head, a critical area in off-road crashes. Whether you’re rolling into steep descents, tackling technical rock gardens, or hitting unexpected drops, you’ll ride with the reassurance that the helmet is designed to keep you safer where it counts most.

LockDown Strap Dividers

Helmet straps can be a faff, but Trek’s LockDown strap dividers make them clean, simple, and frustration-free. Lightweight and adjustable, they sit flat against your face for a secure fit without awkward twisting or bunching. Quick to adjust and easy to set, they help you achieve that perfect fit every time, so your helmet stays snugly in place no matter how rough the trail gets.

Soft Helmet Pads

Long days in the saddle demand comfort, and the Rally WaveCel delivers with its luxuriously soft, moisture-wicking internal pads. Designed to pull sweat away from your skin, they keep you cool and comfortable even on hot climbs and high-effort sprints. After a muddy or sweaty day out, the pads are removable and fully washable, so your helmet feels fresh, ride after ride.

Specification:

Size	S	M	L
Circumference	51-57 cm	54-60 cm	58-63 cm
Fit system	BOA	BOA	BOA
Pad material	Moisture wicking pads	Moisture wicking pads	Moisture wicking pads
Buckle type	Standard buckle	Standard buckle	Standard buckle
Includes	Crash Replacement Guarantee	Crash Replacement Guarantee	Crash Replacement Guarantee
Weight	360g	400g	430g

Occasionally, without notice, manufacturers change product design and/or specifications.