Radian EXR electric enduro bike arrives to rival Stark Varg EX
Dutch start-up Radian has unveiled its new EXR electric enduro bike, and while the Stark Varg EX still leads on outright power, the newcomer fights back with some clever design features and tech.
There’s a new electric enduro bike on the horizon, and if the numbers being thrown around by Dutch start-up Radian are even close to reality, the already bonkers Stark Varg EX might finally have some genuine competition.
Called the Radian EXR, the new machine has been unveiled ahead of a planned Q4 2027 launch, and on paper at least, it goes after the Stark in just about every measurable way. More power, bigger battery options, quicker “refuelling”, and a claimed race-ready setup that’s aimed squarely at riders who still think electric off-road bikes aren’t ready for proper competition use.
And the big headline here isn’t actually the 70bhp motor. It’s the battery.
Where the Stark Varg EX relies on plugging in and waiting somewhere between one and two hours for a recharge, depending on the power source, the Radian’s new InfiniPack setup is designed around rapid battery swaps. Radian claims the curved battery pack can be removed and replaced in under 30 seconds, without tools, effectively sidestepping one of the biggest complaints riders still have about electric off-road bikes.
That’s potentially a massive deal for racing, especially longer enduros and rally-style events where charging downtime can kill any competitive advantage over petrol bikes. The downside is the need to have a mate in a van following you along as you ride with a bunch of ready-to-ride batteries in the back – EV still has its limitations, it seems.
The spec sheet itself is pretty punchy, too, with Radian saying its EXR produces 70 hp and 1,060 Nm (781 lb ft) of torque at the rear wheel, while weighing 125kg with its larger 8.6kWh Endurance battery fitted. A smaller 5.8kWh Sprint pack drops claimed weight to 113kg.
For comparison, the Stark Varg EX Alpha pushes things even harder in outright horsepower terms, with up to 80 hp on tap in the Alpha version (60 hp is available in the Standard version), but it carries a smaller 6.5 to 7.2 kWh battery depending on spec and sits around the 118-120kg mark. Charging time is still quoted at under two hours via its stand-mounted charger.
So while the Stark still wins the outright power war, Radian looks to have focused heavily on solving usability and endurance instead.
That bigger 8.6kWh battery is claimed to deliver between 60 and 115km (37 and 71 miles) of off-road riding at race pace, or anywhere from one to seven hours depending on how hard you twist the fun-tube. Whether those numbers survive real-world testing remains to be seen, because even current Stark Varg owners still debate actual range figures online depending on riding style and terrain.
Like the Stark, the EXR also ditches the gearbox entirely. The motor revs to 14,000rpm and is fully tuneable through a smartphone app, allowing riders to adjust power delivery and throttle response for everything from technical hard enduro riding through to wide-open sand work.
Chassis-wise, Radian is aiming for premium from the outset, with the EXR getting a full aluminium frame that doubles as a cooling system. It then gets KYB suspension and Brembo brakes. Limited-run Founders Edition bikes also get Haan wheels with Excel A60 rims.
And then there’s the weird-but-clever stuff.
The EXR features integrated “Smart Storage” built into the subframe, allowing riders to carry tools, spares, or even an onboard charger inside the bike itself rather than wearing a backpack. Radian says it’ll even release 3D-print files so owners can make their own storage inserts at home.
Visually, it looks more polished than most start-up electric bikes we’ve seen. The aluminium chassis is left proudly on show, the bodywork is slim and modern, and the LED headlight doubles as a charging indicator. There’s even an integrated enduro timekeeping system built into the dash.
Pricing starts from €14,450, which puts it above the price of both the Standard and Alpha versions of the Stark Varg EX. The first bikes are expected to land in the Netherlands, Belgium and Germany from late 2027, before expanding across Europe.
Right now, the Stark remains the benchmark electric enduro bike simply because it already exists in dealerships and people are riding them in anger and buying them in their droves. But Radian’s rapid-swap battery idea feels like one of the first genuinely fresh solutions to the range-versus-charge-time problem electric off-road bikes still face.
You can find out more about the Radian EXR on the official website.
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Simon (AKA Toad) has been working within the motorcycle industry for more than twelve years, and a member of the motorcyclist family since birth. Growing up around British-built single and twins, it was inevitable that a life on two wheels was on the cards, from a very early age!
