How To Unlock The Speed Limit Of Ridstar Electric Bike (1000W Q20 & Q20 Pro 1500W)
Many Ridstar Q20 Lite or Mini and 1500W Q20 Pro owners ask the same question: how do you remove or adjust the speed limiter on the Ridstar Q20? The good news is that Ridstar allows basic speed adjustments directly from the display settings—no controller swap required for limiter changes.
Below is a clear, step-by-step guide, plus important explanations about why your Q20 Pro may still be capped at 30–37 mph even after unlocking.
Remove or Adjust Max Speed Limit on Ridstar Q20
ou can change the speed limit through the display’s parameter settings.
Why Is My Ridstar Q20 Pro Still Limited to 30–37 MPH?
This is one of the most searched questions online: “Anyone figure out how to unlimit the max speed on the Ridstar Q20 Pro? It stops at 30–37 mph with or without load.”
Important Truth: The Speed Limit Is NOT Only Software
Even with dual 52V 20Ah batteries, the bike hits a wall due to below:
Motor RPM limit — Ridstar 1000W / 1500W motor itself has a maximum rotational speed. More watts add torque, not top speed.
Voltage is the key — Higher voltage = higher possible speed. 52V gets you ~37 mph. To go faster, you need ridstar q20 modded to 60V or 72V.
Dual batteries do not increase top speed — Ridstar q20 battery mods help maintain speed and extend range, but they do not make you go faster.
One rider tested this by lifting the bike off the ground. It still maxed at 37 mph with no resistance. That confirms a hard electronic or motor limit.
Can You Mod the Ridstar Q20 to Go Faster
According to multiple users who modded ridstar q20 successfully:
✅ Upgrade to 60V or 72V battery — This is the single most important change. ✅ Replace the controller — Must match the new battery voltage (e.g., 30A+ controller). ✅ Modded Ridstar Motor — Stock motor has proprietary connectors. Most riders recommend swapping all three together: battery + controller + motor. ✅ Swap to road tires — Stock tires are for trails. Road tires like Vee Speedsters reduce rolling resistance and can add a few mph.
⚠️ Important warnings from real builders:
Torque arms are critical — one rider pried his torque arms open at 800 phase amps.
Stock wiring may need upgrading for higher amps.
This is not plug-and-play. You will need basic electrical knowledge or a friend who has it.
Full Twist Throttle for Ridstar Q20
You can easily find compatible full twist or half twist throttles online with pre-matched wiring for direct installation. Popular options include:
True Plug-and-Play Throttle: Features pre-configured wires (often centered green) so you can install it without splicing or wire-swapping. Check out the Full Twist Throttle or Half Twist Throttle.
Surron-Style Throttle: Offers a built-in rolling bearing system for smooth, linear acceleration. View the Surron Style Throttle if you want a more aggressive, dirt-bike throttle feel.
One rider’s real result:
“3000W hub motor, 72V, 45A controller — top speed around 45 mph. I weigh 230 lbs.”
What about just changing controller settings?
No. Multiple users confirm that messing with display settings does not remove the hard limit. The stock controller and motor are paired together with a non-standard connector.
Bottom line:
Goal
Required Upgrade
40–45 mph
60V battery + new controller
45+ mph
72V battery + new controller + new motor (3000W+)
Better acceleration only
Keep 52V, upgrade controller amps
Is it worth it?
That depends. If you already registered your bike and don’t care about legal limits (over 28 mph), then yes — but expect to spend roughly $1,500–2,000 CAD on parts. Many riders say: “Just ride it as-is, or save up for a faster bike from the start.”
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