How To Unlock Your Aventons Top Speed And Why You Should Be Careful

If you own an Aventon e-bike—whether it’s the Aventure, Pace, Sinch, or Level—you’ve probably noticed the speed limiter kicking in around 20 mph. That’s the legal Class 2 ceiling, and Aventon ships all its models capped there by default. But you can push past it. Here’s how to unlock the top speed, what you’ll actually get, and the real risks you need to weigh before doing it.

One important boundary up front: this method works on the original Aventure, Pace, Sinch, and Level models with the stock Aventon display. It does not work on the Aventure.2 or Soltera, which use different controller firmware that locks the wheel-size parameter. If you own one of those, the settings path below won’t appear, and no amount of button pressing will change that.

How To Unlock the Speed Limiter on Your Aventon

The unlock process varies slightly by model, but the core method is the same: you access the display settings and change the wheel size parameter. This tricks the controller into thinking the bike is traveling slower than it really is, which raises the motor cutoff.

Step 1: Enter the Settings Menu

Turn on the bike and press and hold the M (Mode) button on the display for about 5 seconds. On most Aventon models (Level, Pace, Sinch), this opens the advanced settings. On the Aventure, you may need to press the M button and the Up arrow simultaneously. If the menu doesn’t appear within 10 seconds, release and try the combination again—some firmware versions require a slightly longer hold.

Step 2: Navigate to the Wheel Size Setting

Use the Up and Down arrows to scroll through the menu until you see P01 or a wheel-size icon. This parameter controls the wheel circumference in millimeters. The default is typically set to the actual wheel size (e.g., 26 inches = 2070 mm for the Aventure, 20 inches = 1620 mm for the Sinch). Write down the original value before changing anything—you’ll need it to reverse the unlock later.

Step 3: Reduce the Wheel Size Value

Drop the number by 100–200 mm. For example, on a Pace 500 with 27.5-inch wheels (default ~2200 mm), set it to 2000 mm. On a Sinch with 20-inch wheels (default 1620 mm), set it to 1450 mm. The smaller the number, the higher the speed the motor will try to reach before cutting out. But don’t go overboard—dropping it by more than 300 mm can cause the speed sensor to misread entirely, and you’ll get a “0 mph” display while moving.

Step 4: Save and Test

Press the M button to confirm, then exit the menu. Take the bike for a short ride on flat ground. You should notice the motor continues assisting past 20 mph. On the Aventure, expect a top assisted speed around 28 mph. On the Pace or Level, you’ll likely hit 24–26 mph. The Sinch, with its smaller wheels, may top out near 22–24 mph.

Verification step: After saving, check the display while riding at full throttle. If the speedometer reads 0 mph or jumps erratically, the wheel size value is too low. Go back into settings and increase it by 50 mm increments until the reading stabilizes. A stable speed readout means the controller is still tracking wheel rotation correctly.

Important: This method only works on the stock display. If you’ve swapped to an aftermarket controller or display, the settings path will differ.

What You Actually Gain (and Lose) in Real Riding

Unlocking the top speed isn’t a free upgrade. Here’s what changes in practice.

Speed Gains Are Real but Diminishing

The motor’s power curve drops off sharply above 20 mph. On an Aventure with a 750W hub motor, you’ll see a noticeable push from 20 to 25 mph, but from 25 to 28 mph, the acceleration is slow—you’re fighting wind resistance with limited wattage. On the Pace or Level (500W motors), the gain is smaller: expect a 3–4 mph bump, not a dramatic speed increase. The torque at the wheel drops as RPM climbs, so you’ll feel the motor straining rather than surging.

Range Takes a Hit

At 20 mph, a typical Aventon battery (48V, 14Ah) delivers about 40 miles of range. At 25 mph, that drops to roughly 25–30 miles. At 28 mph, you’re looking at 18–22 miles. The motor draws more current to maintain higher speeds, and wind resistance at 28 mph is nearly double what it is at 20 mph. If you commute 15 miles each way, you may need to recharge mid-day. This isn’t a minor efficiency loss—it’s a 40–50% reduction in usable range, which changes how you plan any ride longer than a quick errand.

Motor and Controller Stress

Running the motor past its rated speed limit increases heat buildup. The Aventon hub motors are geared for efficiency at 20 mph. Sustained operation at 28 mph can push internal temperatures above 180°F, which accelerates bearing wear and can degrade the nylon planetary gears over time. The controller also runs hotter, and repeated high-speed runs may trigger thermal cutoff on hot summer days. If you feel the motor housing and it’s too hot to keep your palm on it for more than 5 seconds, you’re exceeding the design envelope.

Why You Should Be Careful: The Real Risks

Speed unlocks aren’t just about fun—they carry legal, mechanical, and safety consequences that many riders overlook.

Legal Classification Changes

Once you unlock the speed limiter, your Aventon is no longer a Class 2 e-bike. It becomes an unclassified vehicle in most states. On bike paths, multi-use trails, and many public roads, riding an e-bike that exceeds 20 mph motor assist is illegal. In states like California, New York, and Colorado, you can face fines (typically $100–$500) and potential impoundment if stopped. Some local parks and trail systems ban any e-bike over Class 2, regardless of how you ride. The legal risk isn’t hypothetical—it changes where you can legally ride at all, and a single citation can cost more than a set of upgraded brakes.

Brake System Limitations

Aventon ships mechanical disc brakes on most models. At 20 mph, these brakes stop you in about 15–18 feet under hard braking. At 28 mph, stopping distance jumps to 30–35 feet. The rotors and pads aren’t designed to shed heat from repeated high-speed stops. On a long downhill run, you can experience brake fade—a sudden loss of stopping power as the pads glaze over. If you unlock the speed, upgrading to hydraulic disc brakes (like the Shimano MT200 or Tektro HD-M275) is a practical safety step. The difference isn’t just feel—hydraulic systems self-adjust for pad wear and dissipate heat more evenly, which matters when you’re carrying 15 extra mph into a corner.

Tire and Wheel Stress

The stock tires on the Aventure (26×4-inch knobby) and Pace (27.5×2.2-inch) are rated for speeds up to 25 mph. Sustained riding at 28 mph exceeds their speed rating. Over time, this can cause tread separation or sidewall blowouts, especially on hot pavement. Check the sidewall of your tires for a speed rating (usually marked as “25 mph max” or “40 km/h”). If you plan to ride unlocked regularly, swap to tires rated for higher speeds, like the Schwalbe Super Moto-X (rated for 31 mph). This is a case where the stock part is adequate for the stock bike—but you’re no longer riding the stock bike once you unlock it.

Battery Safety Margin

The stock Aventon battery uses 18650 cells with a continuous discharge rating around 15–20 amps. At 28 mph, the motor can draw 22–25 amps sustained. That pushes the cells near their limit, increasing internal resistance and heat. Over dozens of high-speed rides, this accelerates capacity loss and, in rare cases, can trigger a thermal event. If you notice the battery getting hot to the touch (above 120°F) after a ride, you’re exceeding safe discharge limits. The trade-off here is straightforward: you can have high speed or long battery life, but not both from the same pack.

Failure Cases: What Can Go Wrong After Unlocking

Riders who unlock their Aventon and ride aggressively often encounter these specific problems.

Error Code 30 (Controller Overheat)

This is the most common failure. The controller’s internal temperature sensor trips at around 175°F, cutting motor power entirely. It usually resets after cooling for 10–15 minutes, but if it happens mid-commute, you’re stuck pedaling a 60+ lb bike home. This is more frequent on the Aventure and Level because of their heavier frames. If you hit Error 30 twice in the same week, you’re riding too hard for the stock controller—consider dropping back to 24 mph or adding a controller cooling fan.

Throttle Cutout at High Speed

On the Pace and Sinch, the throttle is programmed to cut out at 20 mph regardless of the wheel-size trick. You can pedal past that speed, but the throttle won’t engage above 20 mph. This means you can’t use the throttle to accelerate from a stop to 28 mph—you have to pedal up to speed first. This isn’t a bug; it’s a firmware limit that the wheel-size change doesn’t bypass. If you bought the bike specifically for throttle-only riding, the unlock will disappoint you.

Display Malfunctions

Changing the wheel size parameter can confuse the speed sensor. Some riders report the display showing “0 mph” while moving, or the odometer accumulating miles incorrectly. This doesn’t affect riding, but it makes tracking maintenance intervals (like brake pad wear) unreliable. If you rely on the odometer to schedule service, keep a manual log after unlocking. A Nine-Rong Self-Powered Tach Hour Meter can help here—it’s an inductive sensor that wraps around the motor cable and tracks RPM and running hours independently of the display. That gives you a second data source for spotting when the motor is working harder than it should, even if the stock display is misreading speed.

FAQ: Common Questions About Unlocking Aventon Speed

Will unlocking void my warranty?

Yes. Aventon’s warranty explicitly excludes damage caused by modifying the controller or display settings. If your motor burns out or your battery fails after unlocking, the repair cost is on you. That’s not a threat—it’s the written terms of the warranty agreement.

Can I reverse the unlock?

Yes. Just go back into the settings and reset the wheel size to the original factory value you wrote down in Step 2. The bike will return to 20 mph assist. The reversal is immediate and doesn’t require any special tools.

Does unlocking work on all Aventon models?

It works on the original Aventure, Pace, Level, and Sinch. It does not work on the Soltera or the newer Aventure.2, which use a different display and controller firmware that locks the wheel-size parameter. If you have one of those models, the P01 setting either won’t appear or won’t accept changes.

Will I get a speeding ticket on an unlocked e-bike?

Potentially. Police can use radar or a handheld speed gun. If you’re on a bike path or road with a 20 mph e-bike limit, you can be cited for operating an unregistered motor vehicle. The fine varies by jurisdiction, but it’s typically $100–$500 and can include impoundment in some areas.

Do I need to upgrade anything else if I unlock the speed?

At minimum, consider upgrading the brakes to hydraulic discs and installing a speed-rated tire. The stock mechanical brakes and tires are designed for 20 mph operation. If you’re not willing to make those upgrades, you’re accepting a significant safety gap every time you ride above the stock limit.

Unlocking your Aventon’s top speed is a straightforward settings change, but the trade-offs in range, component life, and legal risk are significant. If you decide to do it, ride defensively, keep your battery cool, and plan for shorter trips. The extra 5–8 mph is fun, but it changes the bike’s character from a reliable commuter into a machine that demands more attention and maintenance.