ECR takes a fully built Surron Ultra Bee with Sirris suspension and a Stark Varg to the motocross track to see how they stack up on the track and the trail.
Can the lighter, more agile Ultra Bee keep up with the powerhouse Varg?








Sirris Suspension Dominates 2025 Electric Motocross World Championship at Glen Helen
Back-to-back wins. Unmatched performance. The fastest names in electric motocross are riding Sirris.
Sirris-equipped riders crushed Red Bull TKO 2025 with Surron Ultra Bees, Arctic Leopard EX 800s & Zero XE bikes. See full results, photos, hard-enduro fork builds, and custom suspension tuning insights here.
After pushing the stock Ultra Bees to their limits, they knew it was time to level up with Sirris Suspension.
A New Era Between MTB and Moto. Freeride mountain biking legend Cam Zink partners with Sirris Suspension.