E-Touring-Fully Bulls Sonic Evo AM SL-1 on test

Max Fuchs

 · 13.01.2022

E-Touring-Fully Bulls Sonic Evo AM SL-1 on testPhoto: Max Fuchs
E-Touring-Fully Bulls Sonic Evo AM SL-1 on test
Big batteries and low overall weight are irreconcilable opposites in E-MTBs. Until now. Because the Bulls Sonic Evo AM SL-1 aims to unite both fronts.

The dream figure doesn't fall from the sky. A lot of sleep, discipline and hard training are the price for narrow hips, round bums and a six-pack. A similar dilemma is currently plaguing the e-bike community. On the one hand, we want more battery capacity for long-lasting touring or trail fun. On the other hand, no-one wants to lug the extra weight of the bulky energy source to the summit. Our tests confirm this development. 25.1 kilos: This is how much the touring bikes around 4500 euros weighed in EMTB 1/21 average. This weight problem still separates many mountain bikers from XXL touring fun with a large battery.

Bulls Sonic Evo AM SL-1: Ride height 1908 (+28)hm | Average speed 14.5 km/hPhoto: Max FuchsBulls Sonic Evo AM SL-1: Ride height 1908 (+28)hm | Average speed 14.5 km/h

But once the Bulls Sonic Evo AM SL-1 had passed our lab test, hope arose. The key data: 750 watt hours, full carbon frame, 29 inches and a total weight of 21.5 kilos - all for a price of 5199 euros. This means that the newcomer fulfils everything you could wish for in an e-mountainbike. The new touring fully from the ZEG brand thus undercuts the competition from EMTB 1/21 by 3.6 kilos! At a similar price level and in view of the high battery capacity, this is a record-breaking achievement. But how is this possible?

We answer this question in the test from EMTB 5/2021. You can download the test report as a PDF below the article. The test costs 1.49 euros.

Why not free of charge? Because quality journalism has a price. In return, we guarantee independence and objectivity. This applies in particular to the tests in EMTB. We don't pay for them, but the opposite is the case: we charge for them, namely tens of thousands of euros every year.

The cable of the Bulls display runs through the specially developed stem. A suitable front light can be clicked onto the Monkey Link bracket, which draws power from the main battery.Photo: Max FuchsThe cable of the Bulls display runs through the specially developed stem. A suitable front light can be clicked onto the Monkey Link bracket, which draws power from the main battery.The basic requirement for the slim frame design of the Bulls Sonic with long battery is the compact Shimano EP8.Photo: Max FuchsThe basic requirement for the slim frame design of the Bulls Sonic with long battery is the compact Shimano EP8.The battery mount on the Bulls Sonic seems vulnerable. On our test bike, a plastic part of the battery mount was bent, making the battery very difficult to insert and rattling on the trail. Therefore, it is essential to be careful and precise when inserting the battery.Photo: Max FuchsThe battery mount on the Bulls Sonic seems vulnerable. On our test bike, a plastic part of the battery mount was bent, making the battery very difficult to insert and rattling on the trail. Therefore, it is essential to be careful and precise when inserting the battery.At the limit: The narrow Nobby Nic tyres reach the limit early on off-road and offer little comfort. It's a shame that the Bulls Sonic only comes with the affordable performance version.Photo: Max FuchsAt the limit: The narrow Nobby Nic tyres reach the limit early on off-road and offer little comfort. It's a shame that the Bulls Sonic only comes with the affordable performance version.

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Max Fuchs

Max Fuchs

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Max Fuchs hat seine ersten Mountainbike-Kilometer bereits mit drei Jahren gesammelt. Zunächst Hobby-Rennfahrer und Worldcup-Fotograf im Cross-Country-Zirkus, jetzt Testredakteur und Fotograf bei BIKE. Sein Herz schlägt für Enduros und abfahrtsstarke Trailbikes – gern auch mit Motor. Bei der Streckenwahl gilt: je steiler und technischer, desto besser.

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