RFN Warrior SX-E500 500W Electric Bike - Blue Red

• Description

  Best for riders aged 4–8

  Step-up MX-style bike with more power and capability

  Ideal upgrade from the SX-E400

  Full suspension and hydraulic brakes for real off-road riding

  A true mini motocross bike built for progressing young riders

  Why choose the RFN Warrior SX-E500?

  The RFN Warrior SX-E500 is a serious step up electric MX bike for young riders — delivering more power, more control and more off-road capability than entry-level models.

  Built with proper suspension, hydraulic brakes and a smooth brushless motor, it offers a genuine riding experience while still remaining manageable and confidence-inspiring.

  In stock now with fast UK delivery

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  Three Speed Modes. Built for Progression.

  The SX-E500 gives parents full control with three clearly defined riding modes:

  • Eco — 9.5 mph — controlled and confidence-building
  • Low — 13.5 mph — the natural next step as skills develop
  • Sport — 18.5 mph — full performance for capable riders

  A twist grip throttle keeps control simple and intuitive, while the safety lanyard power-off and power lock cover provide additional peace of mind.

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  Smooth Power. Sine Wave Technology.

  The 36V brushless motor with sine wave controller delivers smooth, predictable power — removing harsh acceleration and making the bike easier to control.

  With 500W peak output, the SX-E500 has the performance to grow with your rider as confidence and ability increase.

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  Suspension, Tyres and Braking

  Full dual suspension gives the SX-E500 genuine off-road capability, helping absorb bumps and uneven terrain across grass, trails and mixed surfaces.

  Hydraulic 140mm disc brakes front and rear provide strong, progressive stopping power — a major upgrade in both safety and control.

  Wide 14 x 2.4 inch all-terrain tyres deliver excellent grip across dirt, mud and loose surfaces.

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  Swappable Battery. More Riding, Less Waiting.

  The removable 36V 5.2Ah lithium battery delivers up to 11 miles or around 75 minutes of ride time.

  Charging takes approximately 2–3 hours, and the swappable design allows extended riding sessions with a spare battery.

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  Is the SX-E500 Right for Your Rider?

  Designed for riders aged 4–8 (approximately 100–120cm tall), with a maximum rider weight of 50kg.

  At 18kg, the bike offers a stable and planted feel while still being manageable for younger riders stepping up.

  Suitability always depends on the individual child’s height, weight and skill level — at the parent’s discretion.

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  What's in the Box

  The SX-E500 arrives semi-assembled — the front wheel, number board and handlebars require fitting, while the throttle and brake controls come pre-fitted to the bars.

  Each bike includes a UK charger, owner’s manual and tool kit.

  Assembly requires a mechanically capable adult. Please ensure all bolts and components are correctly tightened and lubricated before first use.

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  Specifications

  Battery	36V 5.2Ah Lithium
  Motor	36V 350W Brushless (500W Peak)
  Speed Modes	9.5 mph / 13.5 mph / 18.5 mph
  Charge Time	2–3 hours
  Range	Up to 11 miles
  Brake	140mm Front & Rear Hydraulic Disc Brakes
  Tyres	14 x 2.4 inch All-Terrain
  Weight	18 kg
  Ground Clearance	175 mm
  Max Rider Weight	50 kg
  Suitability	Guide 4–7 years (height, weight and skill dependent)
  Throttle	Twist Grip
  Warranty	6 Months Manufacturing Defects (Parts Only)

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  Not Sure Which RFN Warrior Bike Is Right?

  The right RFN Warrior bike depends on your child’s age, height and riding confidence.

  • Shop the full RFN Warrior range
  • Read our RFN Warrior review
  • Read our kids electric bike buying guide

  The SX-E500 is the perfect step up from entry-level bikes like the SX-E400. If your rider is older or ready for more performance, moving further up the RFN Warrior range is the natural next step.

• Delivery & Returns

  Customers have 30 days from when an item arrives to return a purchase to us. All items must be returned in new/unused condition and in original packaging.

  RFN Warranty Please Read*

  It is advised to keep your original box and packaging throughout your bikes warranty period of 6 months in case the bike needs to be returned to us.

  Bikes come with a six-month warranty for manufacturing defects on all major parts.

  RFN Bikes are not responsible for any damage caused by incorrect assembly. So please be sure to take care in assembling your bike as the spare parts are difficult to come by. Ensure ALL bolts and components are tightened and properly lubricated.

  This limited warranty does NOT cover normal wear and tear parts, bearings, tyres, tubes, chains, sprockets, cables or any damage, failure or loss caused by improper assembly, maintenance, storage or use of the Amped product.

  This limited warranty will be void if this product is ever: Used in a manner other than for recreation and transportation. Modified in anyway.  Used in wet conditions.

  4. Warranty is a PARTS ONLY WARRANTY, It does NOT include labour. If the bike needs to be repaired by us, the bike needs to be returned to us (the place of purchase) at the CUSTOMERS cost. 

  5. Please note if you order a bike for delivery outside of the UK and Ireland you will be liable for the price of postage for any parts supplied under our warranty! Postage cost is only covered on warranty parts to the UK and Ireland.