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Tips & Cycling Knowledge
How to Change a Class 2 E-Bike to Class 3: Unlock Your Kingbull's Speed Potential
Welcome, e-bike enthusiasts! Ever wondered how to fine-tune your ride for the perfect balance of effort and speed? One of the most impactful adjustments you can make is unlocking your e-bike's speed limit.
By understanding the differences between Class 2 vs. Class 3 e-bikes, you can tailor your experience to truly savor every journey—whether you're looking for a leisurely cruise or a more exhilarating commute. This guide will walk you through the precise P-setting adjustment to boost your performance safely.
Note: Before you perform this e-bike speed hack, always stay mindful of local laws and regulations to ensure a safe and responsible ride.
Class 2 vs. Class 3: What’s the Difference?
Most Kingbull electric bikes come factory-set as Class 2, meaning they have a throttle and a maximum assisted speed of 20 mph. By upgrading to Class 3, you unlock pedal assist (PAS) up to 28 mph, making it ideal for keeping up with city traffic or shortening your commute.
Step-by-Step Guide: How to Adjust the Pedal-Assist Speed Limit
Ready to unleash the full potential of your electric bike? Follow these steps to access the ebike display settings and unlock Class 3 performance.
Step 1: Enter the Settings (P-Gear) Menu
With your Kingbull display screen powered on, press and hold the "+" and "-" buttons simultaneously for about 2-3 seconds. This will take you into the P-setting interface.
Step 2: Navigate to P08 (Speed Limit Setting)
The P08 menu is the specific parameter that controls the maximum speed of your motor. Briefly press the Power button repeatedly until "P08" appears on the screen.
Step 3: Enter the Unlock Password
For security and to prevent accidental changes, the P08 setting is password-protected.
Short-press the "+" button to enter the password input screen.
The default password is 1010.
Use the "+" button to select the number and the Power button to confirm and move to the next digit.
After entering 1, 0, 1, 0, press the power button one final time to verify.
Step 4: Increase Your Speed Limit to 28 MPH
Once the password is accepted, you will see the current speed limit (usually 32km/h or 20mph). Use the "+" button to increase the value. To achieve Class 3 status, set the limit to 45km/h (equivalent to 28 mph).
Step 5: Save and Exit
To finalize your new ebike speed settings, press and hold the "+" and "-" buttons simultaneously again until the display returns to the main screen. Your changes are now saved!
Important Considerations for Your Upgraded Ride
1. Throttle-Only Mode vs. Pedal Assist
Please note that even after unlocking Class 3, the throttle-only mode remains fixed at a maximum of 20 mph to comply with safety standards. The increased 28 mph speed only applies to Pedal Assist (PAS) levels.
2. Battery Range & Motor Wear
Higher speeds require more power. Increasing your speed to 28 mph may slightly reduce your ebike battery range. We recommend monitoring your battery levels during your first few Class 3 rides.
3. Safety First
Always prioritize your safety. At 28 mph, we highly recommend wearing a high-quality helmet and checking your tire pressure and brakes regularly to handle the increased velocity.
Conclusion: Tailor Your Kingbull Experience
We believe that adjusting your e-bike should be straightforward, leading to a ride that truly feels like your own. Whether you are tackling rugged trails or navigating cityscapes, unlocking your speed gives you the versatility you need.
Still have questions? Watch our [YouTube Tutorial] for a visual walkthrough of these steps, or contact our support team!
Happy riding, and wishing you countless thrilling and safe journeys on your Kingbull electric bike! 🚴🔋
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Tips & Cycling Knowledge
Cadence vs Torque Sensor: What’s the Difference and Which E-Bike Fits You Best?
When shopping for an electric bike, one term you’ll often come across is “pedal assist.” But did you know that there are two main types of pedal assist sensors that can dramatically change the way your ride feels?
In this guide, we’ll break down the Cadence Sensor vs. Torque Sensor debate—explaining what they are, how they feel on the road, and which one suits your lifestyle best. We’ll also show how these technologies come to life in KINGBULL’s current e-bike lineup, including our latest models for commuting and off-road adventures.
What Is a Cadence Sensor (a.k.a. Speed Sensor)?
A cadence sensor is the most common type of pedal assist technology. It detects when you're pedaling and sends a signal to the motor to start assisting. It doesn’t care how hard you’re pedaling—only that the pedals are in motion.
🔧 How It Works:
RPM Measurement: It measures your pedal rotation speed.
Engagement: When you start pedaling, the motor kicks in after a brief rotation delay.
Consistent Power: The level of motor assistance is determined by the PAS (Pedal Assist System) level you select on your display, not by your physical effort.
🚲 The Riding Experience:
Predictable and consistent: Once the motor engages, it provides a steady boost.
Low-Effort Cruising: Ideal for riders who want the motor to do most of the heavy lifting.
The "Scooter" Feel: It feels more like a traditional bike with an automatic "push."
✅ Best For:
Casual riders looking for leisure.
Seniors who need consistent support without straining.
Commuters who want an easy, sweat-free ride to the office.
📍 KINGBULL Models with Cadence Sensors:
Literider 2.0: Lightweight, foldable, and super easy to ride—perfect for city commuters and urban storage.
Hunter 2.0: Rugged and ready for adventure, this off-road beast gives you the extra power without needing to pedal hard on tough trails.
What Is a Torque Sensor?
A torque sensor is a more advanced technology that takes your pedal pressure into account. The harder you push the pedals, the more power the motor provides. It’s a dynamic system that creates a more natural, intuitive riding experience.
🔧 How It Works:
Real-Time Force Sensing: It measures the actual torque (force) you apply to the pedals.
Dynamic Output: The motor output adjusts instantly to your effort.
Intuitive Support: It’s like having a smart riding partner who knows exactly when you need a boost for a hill.
🚲 The Riding Experience:
Smooth and Responsive: There is virtually no delay; the bike feels like an extension of your own legs.
Bionic Boost: Feels like riding a traditional bicycle, but with superhuman strength.
Better Control: Enhanced balance and safety, especially when navigating stop-and-go traffic or technical inclines.
✅ Best For:
Fitness riders who still want to feel the burn.
Riders tackling varied terrain or steep hills where precision matters.
Performance enthusiasts seeking the most premium, natural ride feel.
📍 KINGBULL Models with Torque Sensors:
Verve: A compact, foldable e-bike with a premium feel—responsive, agile, and incredibly commuter-friendly.
Jumper GO: Our high-performance e-bike for riders who want speed, control, and a high-end experience. Now available for pre-order with a $600 Early Bird discount!
🔍 Cadence vs Torque: A Side-by-Side Comparison
Feature
Cadence Sensor
Torque Sensor
Motor Response
On/Off style (Speed-based)
Proportional to pedal force
Ride Feel
More like a scooter/moped
Natural, like a traditional bike
Best For
Easy riding, commuting
Fitness, dynamic terrain, hills
Energy Efficiency
Can drain battery faster
More efficient, conserves power
KINGBULL Models
Literider 2.0, Hunter 2.0
Verve, Jumper GO
Frequently Asked Questions (FAQ)
1. Does a torque sensor make an e-bike faster than a cadence sensor?
Not necessarily. Top speed is usually governed by the motor’s watt rating and local regulations. However, a torque sensor feels faster "off the line" because it responds instantly to your foot pressure, whereas a cadence sensor requires a partial pedal rotation to kick in.
2. Which sensor type is better for battery life?
Generally, torque sensors are more energy-efficient. Because the motor only provides high power when you are working hard, it doesn't "waste" energy when you are pedaling lightly. Cadence sensors provide a set amount of power regardless of effort, which can deplete the battery faster if used on high assist levels.
3. Can I climb hills with a cadence sensor?
Yes! E-bikes like the KINGBULL Hunter 2.0 are excellent hill climbers. With a cadence sensor, you simply need to keep the pedals moving, and the motor will provide the full power of your selected assist level to help you reach the top without exhaustion.
Final Thoughts: So, Which One Is Right for You?
If you want a reliable, low-effort ride—something that gets you from A to B with minimal exertion—go with a cadence sensor model like the Literider 2.0 or Hunter 2.0.
But if you crave a natural, responsive ride and want to feel in sync with your bike, the Verve or Jumper GO with torque sensors will be your perfect match.
Whether you're cruising through the city or climbing mountain trails, knowing the difference between cadence and torque sensors ensures you choose the bike that fits your rhythm.
Ready to ride smarter? 👉 [Explore the KINGBULL E-bike Collection Now]
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Tips & Cycling Knowledge
Kingbull Ebike Battery Guide: What Do the 3 Green and 1 Red Lights Mean?
Kingbull Ebike Battery Indicator Guide: Understanding Your Power Level
At KINGBULL, we want you to feel confident and informed when it comes to taking care of your electric bike—especially the ebike battery, which is the heart of your ride. Proper battery maintenance is key to extending the range and lifespan of your electric bicycle.
One common question our riders ask is: “Why does my ebike battery still show one red light after it’s fully charged?”
Let’s clear that up for you so you can get back to enjoying your ebike adventures!
Decoding the Lights: 3 Green + 1 Red = Fully Charged
When your Kingbull ebike battery indicator lights up with three green lights and one red light, it means your battery is at peak capacity (80%–100%) and ready for the road. This is a standard design for many high-quality electric bike batteries and is not a sign of a malfunction.
Here’s a quick breakdown of what the indicator lights mean for your ebike power level:
Light Pattern
Battery Power Level
Status
✅ 3 green + 1 red
80%–100%
Fully Charged & Ready
✅ 2 green + 1 red
60%–80%
Optimal Riding Range
✅ 1 green + 1 red
40%–60%
Mid-Level Power
❗ Only red
20%–40%
Recharge Your Ebike Soon
So, next time you unplug your ebike charger and see that single red light—relax! That’s simply how the KINGBULL battery system signals it is fully energized.
How to Properly Check Your Ebike Battery Status
To get the most accurate reading of your electric bike's remaining charge, follow these steps:
Unplug the charger from the wall outlet.
Disconnect the charger from the ebike battery port.
Press the indicator button to check the lights.
Pro Tip: Checking the battery while it is still plugged in may give an inaccurate reading.
Smart Ebike Battery Charging & Maintenance Tips
To maximize your ebike battery life and ensure long-term performance, follow these expert-approved habits:
Flexible Charging: You can charge the battery while it's mounted on the electric bike or remove it for indoor charging—whichever is more convenient.
Top It Off: There is no need to wait until the battery is empty. You can recharge your lithium-ion ebike battery after every ride.
Temperature Control: Avoid charging in extreme temperatures. The ideal range for ebike battery health is between 14°F and 104°F (-10°C to 40°C).
No Memory Effect: Modern Kingbull ebike batteries do not suffer from "memory effect," so feel free to recharge even after short trips.
Ebike Charging Safety First!
Your safety is our top priority. Although KINGBULL electric bikes use advanced battery management systems (BMS), you should stop charging and contact us immediately if you notice:
Charging takes significantly longer than the standard 5-7 hours.
Any unusual smoke, odor, or leaking fluid.
The ebike battery or charger becomes excessively hot to the touch.
Understanding the Ebike Charger: Sounds and Lights
While charging your Kingbull battery, you might hear a faint humming sound. This is normal behavior for an ebike charger as it converts voltage to power your ride.
Charger Indicator Meanings:
🔴 Steady Red Light: Charging is in progress.
🟢 Steady Green Light: Charging is complete.
The smart charger will automatically stop drawing power once the ebike battery is full, preventing overcharging.
Final Checklist Before You Ride
Before heading out on your next pedal-assist journey, ensure your battery is securely locked:
Hold the battery firmly with one hand.
Turn the release switch to the "Lock" position.
Pull up slightly to ensure it's clicked in. This prevents the battery from falling out during high-speed ebike rides and deters theft.
Conclusion
We hope this guide makes your ebike battery care easier. Proper charging ensures that your Kingbull electric bike stays reliable for years to come.
Have more questions about your ebike? Our KINGBULL support team is always here to help.
Stay charged. Stay safe. Ride KINGBULL.
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Kingbull News
Kingbull Unveils Trekker: A High-Spec Urban Commuter and Final Chapter in the Forge Series
Kingbull, the fat tire electric bike expert, today officially announced the release of Trekker, the final model in its high-performance Forge Series. Designed with practical commuting in mind, the Trekker combines everyday usability with elevated components and riding comfort. Pre-orders are now open at a launch price of $1,799 — up to $500 less than comparable commuter e-bikes with similar high-end configurations.
Premium Braking and Shifting, Built for Everyday Confidence
For urban riders navigating variable traffic and road conditions, reliable braking and smooth shifting are essential. Trekker comes equipped with the Tektro HD-E3940 4-piston hydraulic disc brake system, paired with 180mm rotors on both front and rear wheels. This high-performance setup ensures powerful, consistent braking even in wet weather or steep descents—significantly outperforming traditional 2-piston systems in terms of modulation and durability.
The bike also features a Shimano 8-speed derailleur system, offering precise gear changes and exceptional drivetrain reliability. Whether climbing city overpasses or cruising through congested bike lanes, the Trekker delivers a smooth, responsive experience, positioning it well above standard commuter bikes in its class.
Long-Range Battery and Smart Torque Sensing
At the heart of Trekker is a Samsung 48V 20Ah integrated battery, enabling a real-world range of up to 80 miles (128 kilometers) on pedal-assist level 1. Powering the ride is a Bafang G062 750W rear hub motor, delivering 85Nm of peak torque, ideal for city hills and loaded trips.
Complementing this setup is a torque sensor, which responds to the rider’s pedal force in real time—resulting in more natural acceleration, reduced battery consumption, and a smoother ride.
Commuter-Ready Design Meets Daily Versatility
The Trekker is built around a low-step aluminum alloy frame, making it easy for riders of all sizes to mount, especially in urban stop-and-go scenarios. Comfort is enhanced by an 80mm front suspension fork, softening uneven pavement and speed bumps during everyday rides.
The bike is fitted with Kenda 20"x4.0" puncture-resistant fat tires that include integrated reflective sidewalls, removing the need for separate reflectors while increasing nighttime visibility without sacrificing aesthetics.
Lighting and alert systems are also thoughtfully integrated, with a 48V LED headlight, tail light, and electronic horn to ensure safety in low-visibility conditions and heavy traffic.
Closing Out the Forge Series: Designed for Everyday Utility
Trekker joins the Forge family as its final chapter, following the launches of the EX Titan (full-suspension trail bike), Jumper Go (urban mid-suspension), and Verve (folding commuter). It stands out as the most balanced commuter-focused build, combining premium parts with practical geometry.
To support riding needs, Kingbull will begin rolling out upgraded service and test-ride centers across the U.S. starting in May. This expansion is backed by a multi-million dollar investment aimed at elevating customer experience and post-purchase support.
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Purchase Guide
Make Her Day Extraordinary: Mother's Day Special Deals Inside!
Remember those sweet childhood moments? Maybe not the exact click of the bike chain on your mom’s bike, but the feeling of her energy and enthusiasm as you explored the neighborhood together. Those rides weren’t just about getting from point A to B—they were about joy, connection, and love on two wheels.
With Mother’s Day just around the corner, flower shops are buzzing and restaurant reservations are disappearing fast. But this year, why not break away from the ordinary? Instead of racing to grab a table, cook her favorite meal, set the table with love, and share a heartfelt dinner together. Then, take things up a notch—with the surprise of an electric bike.
More Than a Gift—A Whole New Experience
Gifting your mom an e-bike isn’t just about the ride—it’s about giving her freedom, joy, and precious time to rediscover herself. Imagine her smile as she unwraps this thoughtful gift. Picture her gliding along sunlit paths, feeling the breeze on her face, the scent of blooming flowers in the air, and the sound of birdsong all around. Whether she’s riding through a quiet neighborhood at dawn or meeting up with friends at the local park at sunset, her e-bike becomes a companion on a journey filled with new memories and well-deserved peace.
If your beloved has just become a mother, this gift takes on an even deeper meaning. It marks the beginning of a new chapter—one where health, happiness, and vitality take the front seat. It’s not just a bike; it’s a promise of time for herself.
E-Bikes Made with Her in Mind
Our carefully curated collection of e-bikes is designed to make every ride smooth, stylish, and safe. From sleek step-through frames to ergonomic seats for maximum comfort, we’ve thought of everything. Whether she’s new to cycling or already a road warrior, our bikes make it easy to enjoy the ride with confidence and grace.
And if your mom is the adventurous type—the fearless explorer who finds joy tearing through trails and embracing the wild—we’ve got something for her too. Our off-road models are built to fuel her spirit and keep her rolling wherever adventure calls
Mother’s Day Specials
💸 $100 Off select e-bike models – automatically applied at checkout
🚴 Early-Bird Discounts on our premium upgraded models
🛍️ 10% Off all e-bike accessories – complete her ride in style
Let’s celebrate every amazing mom with the gift of wellness, adventure, and freedom. More than anything, remember—the most meaningful gift you can give is your time, your love, and the words:
"Thank you for everything."
Ready to make this Mother's Day unforgettable?Shop Now and Surprise Her with the Ride of a Lifetime »
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Kingbull News
Introducing the KINGBULL Trekker: Redefining Everyday Riding with Comfort and Power
Between bustling city streets and quiet suburban trails lies a perfect pace — relaxed, effortless, and refined. That’s the experience we designed the Trekker for. Our newest 26-inch step-thru electric bike blends premium performance with everyday ease, making it the perfect companion for modern riders who value both style and substance.
Power Beneath the Elegance
The Trekker is more than just good looks — it's engineered for real performance:
Bafang 750W motor for strong acceleration and easy hill climbing
Samsung 48V 20Ah battery with a range of up to 80 miles on a single charge
Full-color LED display for real-time ride data and assist control
Tektro 4-piston hydraulic brakes for confident stopping, rain or shine
It’s not just an e-bike — it’s a smart, capable machine built to move with you, wherever you go.
Comfort You Can Feel, Quality You Can Trust
Thanks to the ZOOM front suspension fork, the Trekker absorbs bumps and road vibrations for a noticeably smoother ride. And with an upgraded breathable comfort saddle, you’ll enjoy long-distance rides without fatigue or discomfort.
From daily commutes to weekend adventures, the Trekker is designed to make every ride feel effortless — and enjoyable.
Not Just a Bike — A Lifestyle Upgrade
Trekker isn’t about getting from point A to point B. It’s about how you get there.It’s about riding in comfort, arriving with style, and enjoying every mile in between.
This bike is for those who value freedom, exploration, and simplicity — all without sacrificing performance.
The KINGBULL Trekker: Built for Riders Who Want More From Every Ride
Explore more. Commute smarter. Cruise in style.Trekker is here — and it’s ready to redefine how you move.
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