35A FOC Controller Upgrade Kit for Rad Power Bikes (RadRover 6 Plus & RadCity 5 Plus Compatible)

City5plus step-thru

$229.00

$229.00 $259.00

35A FOC Controller Upgrade Kit for Rad Power Bikes (RadRover 6 Plus & RadCity 5 Plus Compatible)

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

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.

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.

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 FOC Controller Upgrade Kit for Rad Power Bikes (RadRover 6 Plus & RadCity 5 Plus Compatible)

$229.00

$229.00 $259.00

model City5plus step-thru City5plus step-over Radrover6plus step-thru Radrover6plus step-over

🚨 PRE-ORDER NOTICE & ESTIMATED SHIPPING:

• Status: PRE-ORDER ONLY
• Expected Ship Date:(Ships in approx. 3-4 weeks)
• Lock in your kit now — Limited units available for the first production run!
Orders will be fulfilled on a first-come, first-served basis.

The controller allowing for a direct plug-and-play replacement(96mm*58mm*36MM)

Why SurgeGlide 12-MOSFET?
Tired of burning out fragile stock controllers? Our upgraded 12-MOSFET controller is engineered to solve overheating permanently. With double the thermal capacity and a robust aluminum housing, it handles steep hills and continuous loads effortlessly—delivering ultimate reliability as a direct plug-and-play replacement.

Are you tired of the sluggish throttle, the fragile factory wiring, and the fear of a sudden controller burnout?

Meet the Ultima 35A FOC Upgrade Kit**—the most advanced, heavy-duty, and feature-packed controller system ever engineered for the **RadRover 6 Plus** and **RadCity 5 Plus**.

We didn’t just build an aftermarket controller. We analyzed the original factory controllers engineered out all their notorious hardware vulnerabilities, and fused their best traits into one indestructible, high-performance powerhouse.

🚀 Why the Ultima Kit Changes Everything:

1. 35A FOC Sine Wave Technology — Butter-Smooth & Whisper-Quiet
Say goodbye to the loud motor hum and jerky takeoffs. Our **35A Field-Oriented Control (FOC)** delivers insanely smooth, linear acceleration while unlocking the true peak torque of your Bafang motor. No shutter, no lag—just pure, relentless power.

2. Bulletproof Circuitry — No More Blown PAS Sensors
Original Rad controllers are notorious for back-feeding voltage and frying the PAS (Pedal Assist) sensor or the display when a short occurs. The Ultima features **industrial-grade physical opto-isolation**. Even if your wiring gets damaged, your core electronics remain 100% protected.

3. Advanced Thermal Management — Zero Heat Fade
Equipped with a custom-potted aluminum heat-sink housing and automotive-grade 12 MOSFETs. Whether you are climbing steep hills or throttling through sand, this controller runs ice-cold with **zero thermal throttling or heat-induced power fade**.

4. Next-Gen Safety: Heavy-Duty Headlight
High-Power Headlight Support:** Finally, a controller that can feed high-wattage custom front lights without blowing the internal lighting circuit.
5. Supercharged Stock Display Integration
Want to keep that clean, original look? Our controller seamlessly integrates with your **original Rad-branded display and button pads**, while unlocking hidden display diagnostics, higher speed readouts, and customizable riding modes that the factory firmware locked away.

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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