You can find an overview of this group test here: The best MTB helmet with ear protection – 6 jet helmets in comparison
The Jetro name says it all. Derived from the classic jet helmets used in motorcycling, the Bluegrass MTB helmet with ear protection aims to shake up our test field. Like its full-face counterpart, the Vanguard, which impressed the test team in our full-face group test, the Jetro adopts the distinctive Vanguard design, just without the chin bar.
Accordingly, it carries over many of the features from its full-face sibling: an integrated MIPS system designed to reduce rotational forces, a magnetic FIDLOCK buckle and a classic rear adjustment dial to fine-tune the fit. The visor is not adjustable, but it can be removed easily and is designed to give way, which can be an advantage if you happen to snag a branch.
As far as looks go, the Jetro is one of the most striking helmets in this test alongside the Fox Dropframe Pro. The bulky construction delivers almost full-face levels of coverage and inspires a great deal of confidence when the trail gets rough. The Alpina ROOTAGE EVO and the iXS Trigger X MIPS appear noticeably more understated in comparison. The beefy construction is also reflected in the weight. At 582 grams, the Bluegrass is the second heaviest helmet in the entire test field, although it’s only around 30 grams above the average weight of roughly 550 grams. With a price of €250, the Jetro sits roughly in the middle of the test field, with only the Troy Lee Designs Stage Stunt and the Fox Dropframe Pro priced higher at €280.
| Brand | Model | Price | Weight (Grams) | Available Sizes | Available Colours | Material | Certification |
|---|---|---|---|---|---|---|---|
| Bluegrass | Jetro | €250.00 | 582 | S (52–56cm) M (56–57cm) L (58–61cm) |
4 Colours | Polycarbonate (In-mold outer shell), EPS (expanded polystyrene) | EN 1078:2012+A1:2012, NTA 8776 |
In general, the helmet feels tighter to put on than most of the competition, regardless of whether you’re trying a size M or L. In simple terms, it’s a bit of a squeeze to get on and off. Out on the trail, however, that snug fit translates into a reassuring sense of security. Once the Jetro is properly in place, it feels stable and firmly seated, provided the shape suits your head. Riders whose heads aren’t especially square-shaped should find the Jetro comfortable and well-fitting. The fairly thick cheek pads may feel slightly bulky depending on your face shape, which can make the helmet seem tighter than it actually is. They’re also hand-wash only.
The helmet’s substantial construction contributes greatly to the feeling of protection. At times you almost forget that there’s no chin bar. In terms of safety, the Bluegrass Jetro sits at the top of the test field. What feels like strong confidence on the trail is backed up by solid facts. Like the Fox Dropframe Pro, the Jetro meets the NTA 8776 S-Pedelec certification. It goes one step further in the Virginia Tech helmet ratings, where it secures tenth place, underlining the high level of protection not just in theory but on paper as well.
Noise levels are less convincing. In direct comparison, the Jetro is among the louder helmets in this test alongside the Fox Dropframe Pro. While the noise on the Fox Dropframe Pro is mainly caused by its material, the Jetro’s noise comes primarily from wind. Ventilation, on the other hand, is very good. With 21 vents, airflow is strong, although not quite on the level of the Alpina ROOTAGE EVO. Instead, it sits closer to the Urge Rascas. It’s noticeably better than the Troy Lee Designs Stage Stunt, even if it doesn’t quite reach the level of the most breathable helmet in the test field.
Conclusions about the Bluegrass Jetro
Within this test field, the Bluegrass Jetro delivers a very strong sense of security. The beefy construction creates a nearly full-face-like feel, with plenty of coverage, plenty of presence and plenty of confidence on the trail. That impression is further reinforced by the NTA 8776 certification. With MIPS and a FIDLOCK buckle, the Jetro also features modern safety technology and, despite its bulky, motorcycle-inspired look, remains a convincing choice for anyone who clearly prioritises maximum protection over lightweight construction and sleek design.
Tops
- High level of perceived safety
- Good fit
- Pleasant ventilation
Flops
- Bulky appearance
- Non-adjustable visor
- Wind noise quite noticeable
For more information, visit met-helmets.com
Did you enjoy this article? If so, we would be stoked if you decide to support us with a monthly contribution. By becoming a supporter of ENDURO, you will help secure a sustainable future for high-quality mountain bike journalism. Click here to learn more.
Words: Robin Ulbrich Photos: Peter Walker