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Trail Surge Ltd · Unit 62, Centenary Business Centre, Nuneaton, CV11 6RY
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We have a real Nuneaton showroom and repair workshop, with UK-based servicing, repairs and 12-month warranty support. We're here for you after delivery, too.
Visit us: CV11 6RY · Mon–Fri, 10am–4pmTrail Surge Ltd · Company No. 16935369 · VAT No. 521226239
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TrailSurge is UK registered and VAT registered: Company No. 16935369 · VAT No. 521226239.
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Included with your purchase
12 monthsof cover
UK-based warranty and after-sales support
Frame & forks · Motor & controller · Battery & charger · Factory-fitted electrics & mechanical parts
Fault assessment, warranty guidance and help arranging eligible repairs or replacement parts.
Contact our UK team with your order number and a few photos.
Normal wear, accidental damage, misuse and unauthorised modifications are excluded. Eligibility and remedies are subject to the full warranty terms.
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.
Frame & forks · Motor & controller · Battery & charger · Factory-fitted electrics & mechanical parts
Fault assessment, warranty guidance and help arranging eligible repairs or replacement parts.
Contact our UK team with your order number and a few photos.
Normal wear, accidental damage, misuse and unauthorised modifications are excluded. Eligibility and remedies are subject to the full warranty terms.
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.
Quick Summary
The VARUN S20-2 Pro is a versatile folding fat-tyre electric bike designed for commuting, leisure riding and mixed terrain. Featuring a strong aluminium-alloy folding frame, 20″ × 4.0″ fat tyres, full suspension and a 250W brushless motor, it combines everyday practicality with comfortable, confident performance.
Smooth Power Delivery
Equipped with a 250W brushless motor producing up to 55Nm of torque, the S20-2 Pro delivers smooth assistance for everyday riding and hillier routes. It comes factory-limited to 25 km/h (15.5 mph) and features a 5-level pedal-assist system with a cadence sensor, alongside Shimano 7-speed gearing for greater control over different terrain.
Comfort & Control
The 20″ × 4.0″ fat tyres provide excellent stability and cushioning across roads, tracks and uneven surfaces, while the full-suspension system uses front and rear suspension to improve ride comfort. Dual mechanical disc brakes provide dependable stopping performance, and the upgraded integrated mag wheels reduce the need for spoke maintenance.
Smart Battery System
Powered by a removable 48V 13Ah lithium-ion battery, the S20-2 Pro offers a manufacturer-stated range of approximately 70–120 km (43–75 miles), depending on assistance level, rider weight, terrain, weather and riding conditions. Charging takes approximately 4–5 hours, and the removable design allows the battery to be charged separately from the bike.
Tech You Can Trust
The upgraded colour LCD display provides essential riding information and supports app connectivity, NFC unlocking and Bluetooth locking. The bike also features an adaptive LED headlight and rear light for improved visibility, along with an IP65 water-resistance rating for added protection during everyday use.
Built for Everyday Use
Built around a durable aluminium-alloy folding frame, the S20-2 Pro supports a maximum total load of up to 150 kg (330 lbs). Its reinforced rear rack can support up to 50 kg, making it useful for carrying luggage and everyday essentials. The folding design also makes the bike more convenient for transport and compact storage.
Optional Throttle Support
The S20-2 Pro does not come with a throttle as standard. VARUN offers compatible thumb-throttle and twist-throttle options separately. Riders should always check local regulations before using a throttle or changing the bike's factory speed settings on public roads.
| Collection | Electric Bikes |
|---|---|
| Brand | Varun |
| Motor Power | 250W |
| Battery | 48V 13AH |
| Top Speed | 15.5 MPH |
| Max Range | 43 MILES |
| Charging Time | Approx. 4-5 hours |
| Shock Absorbers | Rear Shock Absorber |
| Wheel Size | 20" x 4.0" tyres |
| Brakes | Dual Mechanical Disc Brakes |
| Gears | Shimano 7-speed |
| Bike Weight | 32 KG |
| Max Climb | 30" Degrees |
Check rider measurements and sizing before you order.
Fit guidance: Folding 20 in fat-tyre frame; suitable for riders 158–185 cm.
Sizes are a guide. Rider proportions, footwear and setup can affect fit.
The VARUN S20-2 Pro features an upgraded smart colour display with NFC unlocking, allowing the bike to be activated quickly without using a traditional key. Simply use the compatible NFC function to unlock the system and get ready to ride. The display also supports app connectivity and Bluetooth locking, giving riders a more convenient and modern way to manage their e-bike.
The VARUN S20-2 Pro is equipped with an adaptive LED headlight and rear light to improve visibility when riding in darker or low-visibility conditions. The front light helps illuminate the road ahead, while the rear light makes the rider more noticeable to traffic behind. For added riding safety, the bike also features dual mechanical disc brakes, providing reliable and controlled stopping power across everyday roads and more uneven terrain. Its 20 × 4.0-inch fat tyres add extra grip and stability, while the bike is also CE/UKCA safety certified and carries an IP65 water-resistance rating for added protection during normal outdoor use.
The VARUN S20-2 Pro is powered by a 250W brushless rear hub motor producing up to 55Nm of torque, giving smooth and responsive assistance for everyday commuting, inclines and mixed terrain. The motor works with the bike’s 5-level pedal-assist system, allowing riders to adjust the level of support to suit their route and riding style. With assistance limited to 25 km/h (15.5 mph), it delivers controlled power while keeping the ride comfortable and manageable.
1 x Varun S20-2 Pro Electric Bike
1 x Charger
2 x Keys
1 x Tool Kit
1 x User Manual
Watch the assembly guide below before first setup.
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Have a question before ordering or need help afterwards? Our UK-based team is here to help with product advice, orders, parts and warranty enquiries.
Keep your ride performing at its best. Our Nuneaton workshop offers servicing, diagnostics and repairs for bicycles, e-bikes and electric scooters.
