Warranty & customer support
Order assistance and applicable legal guarantees
Support beyond delivery
Our team can help with product questions, troubleshooting
and eligible warranty or fault claims.
Qualifying EU consumer purchases are generally protected
by a minimum two-year legal guarantee for goods that are
faulty or not as described. Some countries provide longer
protection. These rights are separate from any optional
manufacturer or commercial warranty.
Please include your order number and a description
of the issue when contacting us.
Frame & forks · Motor & controller · Battery & charger · Factory-fitted electrics & mechanical parts
Here when you need us
Fault assessment, warranty guidance and help arranging eligible repairs or replacement parts.
Need to make a claim?
Contact our UK team with your order number and a few photos.
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Cover & exclusions
Normal wear, accidental damage, misuse and unauthorised modifications are excluded. Eligibility and remedies are subject to the full warranty terms.
Need to make a claim?
Contact TrailSurge with your order number, a description of the fault and clear photos or a video. Our team will assess the issue and explain the next steps.
Cyrushermanufacturer warranty
Manufacturer warranty period
2 years on the frame, motor and controller; 1 year on the battery, hydraulic brakes, fork, rear shock, display, pedal-assist sensor, charger, cockpit, seat post, bottom bracket, crankset, rear rack and shifting system.
Manufacturer cover
Confirmed manufacturer defects in the listed original components. An accepted warranty normally provides one replacement part for each eligible covered component.
Separate manufacturer terms apply. Warranty periods are not added together.
View warranty detailsHide warranty details
What’s covered
Frame & forks · Motor & controller · Battery & charger · Factory-fitted electrics & mechanical parts
Here when you need us
Fault assessment, warranty guidance and help arranging eligible repairs or replacement parts.
Need to make a claim?
Contact our UK team with your order number and a few photos.
Cover & exclusions
Normal wear, accidental damage, misuse and unauthorised modifications are excluded. Eligibility and remedies are subject to the full warranty terms.
Need to make a claim?
Contact TrailSurge with your order number, a description of the fault and clear photos or a video. Our team will assess the issue and explain the next steps.
Cyrushermanufacturer warranty
Manufacturer warranty period
2 years on the frame, motor and controller; 1 year on the battery, hydraulic brakes, fork, rear shock, display, pedal-assist sensor, charger, cockpit, seat post, bottom bracket, crankset, rear rack and shifting system.
Manufacturer cover
Confirmed manufacturer defects in the listed original components. An accepted warranty normally provides one replacement part for each eligible covered component.
Separate manufacturer terms apply. Warranty periods are not added together.
Description
The Cyrusher Rumble 2.0 is a high-performance fat-tyre electric mountain bike built for riders who want power, endurance, and rugged capability. With a 250W road-legal motor (unlockable for higher output), a massive 52V 20Ah battery and full suspension, it’s designed for commuting, off-road adventures, and long-distance exploration.
Smooth Power Delivery Equipped with a 250W brushless rear hub motor, the Rumble 2.0 provides smooth and consistent assistance up to 25km/h, fully compliant with UK/EU regulations. Unlocking gives access to higher peak power for private/off-road use, delivering strong torque and confident climbing ability.
Comfort & Control 26” x 4.0” fat tyres offer outstanding grip and stability across sand, snow, gravel, and tarmac. Full suspension—front air-suspension fork and rear shock absorber—ensures a smooth, controlled ride on rough terrain. Hydraulic disc brakes provide responsive stopping power in all conditions.
Smart Battery System A 52V 20Ah lithium-ion battery powers the Rumble 2.0, delivering up to 100–120km of pedal-assist range depending on terrain and riding style. The battery is removable and lockable, and charging takes around 7–9 hours.
Tech You Can Trust A colour LCD display shows PAS level, speed, distance, trip data and battery status. Integrated LED headlights and a brake-activated rear light keep you visible and safe when riding at night or in low-light conditions.
Built for Everyday & Adventure Use With its rugged aluminium alloy frame and heavy-duty build, the Rumble 2.0 supports up to 150kg. Its combination of fat tyres, long-range battery and full suspension makes it versatile enough for city commuting and extreme outdoor rides.
Check rider measurements and sizing before you order.
Maximum load150KG
More measurements & dimensions
Seat height
82–106 cm
Deck size
Not applicable — bicycle frame
Built dimensions
180.5 × 64 × 116.5 cm (L × W × H)
Fit guidance: Adjustable 82–106 cm saddle height provides a broad fit range. Contact us with your height and inside leg if needed.
Sizes are a guide. Rider proportions, footwear and setup can affect fit.
All Your Ride Info at a Glance
Stay fully informed with the Rumble 2.0’s large LCD display. Track your speed, battery level, pedal assist mode, trip distance, and more — all in real time. Easy to read even in bright sunlight, it keeps you in control and helps you ride smarter.
Adaptable Gearing for Varied Riding Scenarios
The Shimano 7-speed derailleur provides smooth and accurate gear shifts, allowing riders to adjust to different terrains and riding preferences effortlessly.
Stability Across Diverse Terrains
Equipped with Chaoyang fat tires, the Rumble 2.0 offers enhanced traction and shock absorption, providing a comfortable ride on various surfaces, from city roads to gravel paths.
What’s Included in the Box?
1 x Cyrusher Rumble 2.0 Electric Bike
1 x Charger
2 x Keys
1 x Tool Kit
1 x User Manual
Assembly Information
Assembly Video
Watch the assembly guide below before first setup.
The Rumble 2.0 uses a 48V 18Ah battery, with Cyrusher quoting up to 58 miles (94 km) per charge.
A full charge is typically around 6–7 hours. Range will be lower on steep hills, soft terrain or with high assist use.
It is well suited to hillier mixed riding. The 250W rear hub motor is rated up to 85 Nm, and the torque sensor plus Shimano 7-speed gearing help deliver strong, controlled assistance on climbs.
They provide plenty of grip, stability and cushioning on poor roads, gravel and mixed surfaces.
The trade-off is extra weight and rolling resistance compared with a narrower city tyre, so the Rumble feels more substantial than a lightweight commuter bike.
The Cyrusher Rumble 2.0 Electric Bike arrives mostly assembled. Final setup normally includes aligning and securing the handlebars, fitting the pedals and completing essential safety checks. Allow approximately 20–30 minutes, or select our professional assembly and PDI service.
The Cyrusher Rumble 2.0 Electric Bike is not fully waterproof. Avoid prolonged exposure to heavy rain, and never submerge or pressure wash the bike or its electrical components. After riding in wet conditions, wipe the bike dry and store it in a dry, sheltered location.