35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models

35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models

RadRover 3/4/5
$229.00
$229.00 $259.00
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35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
  • 35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models
​SurgeGlide 1-Year Secured Warranty

We stand behind the quality of our performance parts. Your purchase includes a comprehensive one-year secured warranty covering any manufacturing defects in materials and workmanship under normal use. If your controller/motor encounters a verifiable manufacturing issue within 12 months of purchase, we will provide a repair or replacement
compatible models

  • RadRover
  • RadCity
  • RadRunner
  • RadWagon
  • RadExpand
  • RadMission
  • RadTrike
Shipping&Taxes Included (DDP)

Duties & Taxes Included — No Extra Fees on Delivery

We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Manufacturing

Our products are manufactured both locally and globally. We carefully select our manufacturing partners to ensure our products are high quality and a fair value.
Return policy

​Due to strict federal shipping regulations regarding Hazardous Materials (Hazmat/Class 9), this battery product is subject to a specific return policy that overrides our general policy:
​14-Day Return Window (Unopened Only): Returns are accepted within 14 days of delivery ONLY if the battery is unopened, unused, in its original packaging, and with all security seals intact.
​Opened or Used Batteries: For safety and legal reasons, we CANNOT accept returns for any opened, installed, or used batteries, unless our technical team verifies a manufacturing defect.
​Return Shipping & Hazmat Fees: Buyers are strictly responsible for all return shipping costs, including mandated Hazmat (Class 9 Dangerous Goods) handling fees, certified shipping labels, and compliant packaging.
​Restocking Fee: All eligible battery returns are subject to a 15% - 20% restocking fee to cover safety inspection, testing, and processing

35A Controller & KT-LCD8H Compatible Upgrade Kit for Rad Power Bikes (RadRunner 1/2/plus, RadCity 3/4, RadWagon 3/4，RadRover 3/4/5, RadMini2/3/4, RadMini Step-Thru 2, RadRhino, RadExpand 5)Works with all European/Canadian models

$229.00
$229.00 $259.00
Select Your Rad Model

 https://youtube.com/shorts/7RNgxoetO4A?is=IT6qrcn_q2EZ2RSv

COMPATIBILITY & FITMENT GUIDE

Compatible Models (100% Plug and Play):
• RadRover: 2016–2018 RadRover, 2019–2021 RadRover 5
• RadRunner: RadRunner 1, RadRunner 2, RadRunner Plus
• RadExpand: RadExpand 5
• RadMission: Compatible (Recommended: lower max power setting via display)
• RadCity & RadWagon: Legacy pin controller models (RadCity 3/4, RadWagon 3/4)
• Regional Variants: Fully compatible with European (RadRhino) and Canadian spec models (except Rover 6)

Incompatible Models:
❌ NOT Compatible with RadRover 6 Plus (Step-Through or Step-Over)

Voltage & Battery Specs:
• Supported Battery Voltage: 48V and 52V systems
• Incompatible Voltage: NOT recommended for 60V batteries

Compatibility & Lighting Specs：

 Universal Fitment:** 100% plug-and-play for Rad Power models up to Rover 5. (Not compatible with Rover 6).

Full Rear Lighting Sync:** Restores full plug-and-play functionality for your factory tail light, including high-brightness brake lights

Headlight Safety Note: Do not connect high-wattage aftermarket headlights directly to the controller, as it can overload the stock lighting circuit.

Want High-Power Lights：To safely upgrade to heavy-duty headlights, please purchase our optional **SurgeGlide Headlight Signal Module** Model: TLC06 It supports 10-100V wide voltage and isolates high current to protect your system.

### Fitment & Compatibility Guide (Mini, City & Wagon)

 * **RadMini & RadExpand:** 100% original location installation. Designed with a compact profile ($135x60x45mm), it fits perfectly inside your stock mounting tray without any frame interference.

* **RadCity & RadWagon (Up to Wagon 4): Fully tested and verified （City1-4，Supports regen braking on stock direct-drive motors）. Provides seamless plug-and-play compatibility with no extra mounting hardware or tuning required. (Note: Not compatible with the new RadWagon 5).

* **Factory-Matched Plugs:** Comes with standard, exact-fit battery and power connectors for your specified model year—zero wiring modifications needed.

SurgeGlide Ultra 35A Performance Upgrade controller for Rad Power & Premium E-Bikes

Take your e-bike to the next level with the new-generation SurgeGlide Ultra 35A Performance Upgrade Kit. Designed for Rad Power and compatible premium e-bikes, this complete plug-and-play system delivers stronger acceleration, improved hill-climbing performance, advanced customization, and enhanced reliability.

Core Upgrades

35A FOC Sine-Wave Controller with Dual-Mode Adaptive Technology

Experience true FOC (Field-Oriented Control) vector control for whisper-quiet operation and exceptionally smooth acceleration.

The dual-mode adaptive system features motor self-learning technology that automatically matches and optimizes controller settings for your motor, ensuring maximum efficiency and

🎬 [Watch Our Step-by-Step Motor Self-Learning Guide on YouTube]

👉performance.https://youtube.com/shorts/rBJy5YsP3cU?is=6IJ9DCibaUEaf4gF

Military-Grade Full Potting Protection

Built with industrial-grade heavy potting compound for complete internal sealing.

Features:

  • IP67 waterproof protection
  • Salt-spray corrosion resistance
  • Dust and moisture protection
  • Designed for all-weather riding conditions

Ride confidently through heavy rain, wet roads, and demanding environments.

Heavy-Duty High-Current Phase Wires

Upgraded extra-thick phase wires are engineered to handle sustained high-current loads.

Benefits include:

  • Improved power delivery
  • Reduced heat buildup
  • Enhanced durability
  • Protection against burned connectors and melted wiring during aggressive riding or steep hill climbs

Next-Generation Color LCD Display & Bluetooth App Tuning

The included high-definition color LCD display provides clear ride data and advanced system control.

Bluetooth app integration allows riders to customize:

  • PAS levels
  • Speed limits
  • Firmware settings
  • Ride characteristics
  • Individual gear speed settings

Ultra-Compact Design

Despite its powerful 35A output, the controller maintains a compact profile:

135mm × 60mm × 45mm

Perfect for installations where space is limited, including battery trays and compact controller compartments.

Professional Safety Features

Fully CE Certified and equipped with advanced safety systems including:

  • Throttle Runaway Protection

  • Motor Protection Logic

  • System Monitoring Functions

  • Regenerative Braking Support (Direct Drive Motors)

100% Plug-and-Play Installation

Designed as a true zero-cut upgrade.

Custom-matched waterproof connectors plug directly into your factory wiring harness.

No cutting.
No splicing.
No crimping.

Typical installation can be completed in approximately 15 minutes.

Package Includes

  • 35A FOC Sine-Wave Controller
  • Color LCD Display
  • Bluetooth App Support

Compatibility

Compatible with select Rad Power and premium e-bike models using matching connector systems.

Please verify connector compatibility before purchase.

Plug and play e-bike controller kit

Bluetooth app tunable e-bike controller

35A FOC controller for premium e-bikes

Perfect replacement for standard KT-LCD8H and Area 13 35A combos, but with upgraded FOC silent technology

Disclaimer:
This upgrade kit is designed as an aftermarket component compatible with specific Rad Power Bikes models. Brand names, model designations, and trademarks mentioned above are used strictly for compatibility identification purposes only. SurgeGlide is an independent aftermarket manufacturer and is not affiliated with, sponsored by, or endorsed by Rad Power Bikes
  • 5 stars: 3 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Paumpire

I looked for a replacement controller for my Espin Sport 500 watt e-bike and the factory stopped producing them a few years earlier and I wasn’t just going to give up Lyon was in a group i had joined and he and his company took the time to build a brand new controller. Lyon packed it up and sent it from his home country. I received it about 10 days later, switched out the old with the new and it worked perfectly. I can’t thank Lyon enough for all his efforts and his company. 5 stars for a friend that went beyond. Thank you again Lyon.

J
Janice

I purchased the surgeglide controller with Ride Power app to fix a discontinued ebike, and i wasn't able to purchase anymore parts. They stepped in and fitted there controller to my bike.

My bike needed a male to male adaptor from motor to controller so they manufactured an adaptor so the controller would fit my ebike.

My bike had to be tested as one of my batteries was bad so I had to reroute some of the wires and make adjustments to the app. I received assistance as a novice and everything was easy and plug and play. Awesome controller really woke my bike up and my bike is better than new. Products are superior. The ability to adjust your own speeds is awesome, so if you want more of a work out for pas or to adjust to slower or faster speeds. The ability to adjust your settings is great.

Thank you so much for helping me.

j
jerry santiago jr

As a shop mechanic, this is hands-down the best Rad upgrade kit on the market.

We service a lot of custom e-bikes and Rad models in our shop. The stock controller always lacked torque, but this 35A SurgeGlide kit completely transforms the bike. The throttle response is instant with zero lag, and the low-end power makes climbing steep hills effortless.

Best of all, it's 100% plug-and-play with waterproof Julet connectorsno cutting or splicing cables needed. The firmware tuning is super smooth, and thermal management is rock solid. the SurgeGlide engineering team provides incredible support

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