Sirris CMX upside-down fork – The high-performance fork for e-motorcycles

Do you ride an electric motocross or enduro bike and finally want a fork that can handle the brutal acceleration and heavy weight of electric drives? The Sirris CMX is the first upside-down fork that has been consistently developed for the extreme stresses of modern e-motorbikes, whether Surron Light Bee, Talaria Sting, E-Ride Pro, RFN Apollo, or comparable models. 220 mm of travel, genuine closed-cartridge technology, and a rock-solid construction make it the new benchmark in the e-motorcycle scene.

Bombproof upside-down construction for maximum rigidity

43 mm chrome-plated steel stanchions combined with seamless 7050 aluminum outer tubes (type 3 hard anodized) and solid 6061 aluminum triple clamps and a seamless 7050 head tube. The result: virtually no flex, even during full-throttle braking or hard landings with a system weight of over 100 kg.

Symmetrical closed cartridge damping – fully adjustable and heat resistant

Spring-assisted, modified IFP closed cartridge on both sides. Compression stage adjustable without tools, rebound stage adjustable with hexagon socket, perfectly tuned to the high thermal loads and torque of electric motors. Consistent performance even after 30 minutes of full throttle on the track.

220 mm suspension travel – made for airtime, downhill, and technical trails

775 mm axle-crown measurement (drop crown variant +25 mm = 800 mm) and generous suspension travel. The drop crown version also allows the installation of a 21-inch front wheel for even more traction and smoothness at high speeds, ideal for those who want to push their e-moto to the limit.

Built for the reality of e-motorcycles – extremely durable, yet suitable for everyday use

Approximately 4 kg per fork leg (~8 kg total) sounds heavy? The weight is in the construction, which can handle landings at 80–120 km/h, engines running at full throttle, and heavy batteries without complaint. 210-degree impact-resistant PP mudguards and proven NOK MX seals reliably keep dirt and water out.

Plug-and-play for almost all common electric motorcycles

Directly compatible with Surron Light Bee (L1e & X), Talaria Sting/R, E-Ride Pro, RFN Apollo, and many other models with similar geometry. Available in Regular/Flat Crown and Drop Crown, as well as with MEDIUM (63–81 kg rider incl. upgrades) and HEAVY (82–100 kg) spring rates. Installation usually takes less than 30 minutes.

The most important facts at a glance:

• 220 mm suspension travel at 775 mm / 800 mm (drop crown) axle-crown measurement
• Genuine symmetrical closed-cartridge damping with external adjustment (compression stage without tools)
• 43 mm chrome-plated steel standpipes + hard-anodized 7050 aluminum outer tubes
• Only approx. 8 kg total weight with extreme load capacity for e-moto forces
• Compatible with 21″ front wheel (drop crown) and includes 210° mudguards

The Sirris CMX is the fork that finally lets your e-moto ride the way it was built to ride: uncompromising, fast, and always at the limit. Pure performance, made for electric power.