Radian EXR challenges the Stark VARG with a 30-second battery swap

Electric enduro bikes have evolved from niche experiments into a growing segment of the off-road world, and few models have attracted as much attention as the Stark VARG. Now, a new challenger has emerged from the Netherlands.

The Radian EXR is an all-new electric enduro motorcycle unveiled in spring 2026. Like the Stark VARG, it focuses on high performance, low weight and premium components from well-known suppliers. However, outright power is not the bike’s headline feature. Instead, it is the battery system that has generated the most interest.

Separate battery modules

One of the most common criticisms of electric enduro bikes has been charging times. Radian aims to address this issue with a battery system the company calls InfiniPack.

Rather than using a fixed battery pack, the EXR employs two separate battery modules that can be swapped without tools in less than 30 seconds. When one battery is depleted, the rider can quickly install a fully charged replacement and continue riding.

The battery system has a combined capacity of 8.6 kWh. According to Radian, this provides a range of between 60 and 115 kilometres in off-road conditions, depending on riding style and terrain. The company also states that charging from 20 to 80 per cent takes approximately 90 minutes using the supplied 3.3 kW charger.

70 Horsepower and 125 Kilograms

Radian claims a peak output of 70 horsepower (52 kW) and 1,060 Nm of torque at the rear wheel. Weight is quoted at 125 kg with the larger Endurance battery installed. A lighter Sprint version with reduced battery capacity is planned for a later date and is expected to reduce weight to around 113 kg.

The motorcycle is powered by an Internal Permanent Magnet (IPM) motor capable of spinning up to 14,000 rpm. As with several other modern electric motorcycles, power delivery and riding modes can be adjusted via a smartphone app.

Premium components throughout

Suspension is supplied by KYB, offering 300 mm of travel front and rear. The braking system comes from Brembo, while the wheels feature Excel rims in traditional enduro sizes: 21 inches at the front and 18 inches at the rear. The aluminium chassis also serves as part of the powertrain’s cooling system.

Other features include a reverse gear, integrated storage space and the possibility of EU road homologation.

A rival for the Stark VARG

Comparisons with the Stark VARG came almost immediately.

Stark still holds the advantage when it comes to outright power, but Radian has chosen to focus on range and usability. The ability to swap batteries in less than half a minute is the feature that most clearly distinguishes the EXR from several of its competitors.

Whether the system proves as seamless in real-world use as it appears in presentations remains to be seen.

Availability

Radian says deliveries of the EXR are scheduled to begin during the fourth quarter of 2027. European pricing has been announced at €14,450 before any local taxes, duties or registration fees.