Spanish carbon mountain bike manufacturer, Unno, has released its first eMTB; the Boös. Sporting 160mm of rear wheel travel delivered by its virtual pivot point suspension platform, the Boös rocks a Bosch CX Gen 4 motor with a 750Wh battery housed inside the downtube. The complete eBike will set you back €9,995; it will eventually be available in three sizes, but only one of those is available at launch.

Unno Boös eMTB

unno boos rear view vpp suspension linkage 160mm travel emtb bosch powered

The Unno Boös rolls up on a mixed-wheel platform; 29″ up front and 27.5″ in the rear

The Unno Boös is more than a little intriguing. The fact that it is an Unno is enough to make us look twice; this eMTB follows in the footsteps of some of the more interesting bikes we’ve covered on Bikerumor, including the Unno Dash 130mm travel 29er, the sub 800g Unno Aora hardtail, and the Unno Ever DH Bike, all of which were dreamed up and realized by former World Cup DH racer, Cesar Rojo. 

unno boos vpp suspension linkage platform

Tire clearance on the Unno Boos looks to be maxed out with a 27.5″ x 2.4″ Maxxis Minion DHRII, particularly at the seat stay bridge

This eMTB runs a VPP linkage design, new to Unno who have previously made use of dual-link suspension platforms across their range of shorter travel mountain bikes. Like we see on the Ever DH Bike, however, its Fox X2 shock sits within a tunnel created by the seat tube, just above the Bosch motor. That works to keep weight distributed near the bottom bracket, making for a bike with a low center of gravity. Unno recommend riders run anything between 30% and 40% sag, on either an air or coil shock.

unno boos emtb rolling steep rock drop

The Unno Boös geometry is interesting in that it is fairly progressive in some ways, but a little conservative in others. Across the S1-S3 frame sizes, the chainstay length is consistent at 450mm, while reach measurements are quoted as 435mm, 470mm and 510mm. The head tube angle sits at 64°, fairly standard for a bike with these travel numbers, while the seat tube stands to attention at 77°.

unno boos emtb roosting corner

The Unno Boös frame gets double row EnduroMAX bearings for its Metric 7 bearings, helping to support radial and axial forces pushed through the frame

The Unno website says, “There’s a fistful of room between you and the bars, so aggressive riding is welcome!”. While the reach figures are generous, and the longish rear-center length will surely encourage active weighting of the front wheel, I fear the seat tube length will be a limiting factor in just how aggressively this bike can be ridden. Take the S1, for example: Unno say it is suited to riders shorter than 175cm. While riders who are very close to that height may have no issue at all, riders shorter than that who would normally be quite happy on a bike with a 435mm reach, may struggle with clearance above the saddle.

unno Boös sizing geometry s1 s2 s3 sizes

Unno bikes stand out for a number of good reasons, one of which is their super lightweight made-in-Spain carbon frames. The Unno Boös is no different, weighing a claimed 22.6 kg in S2 with the same spec seen throughout this article. 

unno boos top tube view

The Unno Boös eMTB frame contains 184g of Oceanworks Nylon, a recycled plastic made from 80% ocean waste

Pricing & Availability

The Unno Boös eMTB retails at €9,995 in the Race model seen here, and is available only in S2. Size S1 and S3 are due to be available around June 2022.



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