Short answer: the ARRMA Limitless is not a normal ready-to-run car with one fixed top speed. It is a speed-run roller, so the final speed depends on the motor, ESC, batteries, gearing, tires, radio setup, road surface, temperature, and driver experience. Treat speed claims as setup-specific, not guaranteed numbers.
Affiliate disclosure: As an Amazon Associate, I earn from qualifying purchases. RC Tech Tips may receive a commission if you use Amazon links on this page. Speed-run parts can be dangerous when mismatched, so verify every component before buying or running.
What The Limitless Needs Before It Runs
The Limitless roller needs electronics and supporting gear before it is a running car. At minimum, check the motor, ESC, receiver, transmitter, steering servo, batteries, charger, pinion, tires, and safe run location. A roller listing is not the same as an RTR box.
| Item | Why it matters | Verify before buying |
|---|---|---|
| Limitless roller | Base speed-run chassis | Roller status and required electronics |
| 160A ESC | Controls motor power | Voltage, connectors, programming, cooling |
| 1250Kv motor | Sets torque and speed potential | Can size, shaft, mount, gearing, ESC pairing |
| Receiver | Radio control and fail-safe | Protocol, transmitter compatibility, antenna routing |
| 4S LiPo pack | Battery building block | Single vs pair, dimensions, connector, charger |
| Pinion gear | Speed and heat tuning | Pitch, bore, tooth count, motor temperature |
ARRMA Limitless roller electronics checks
ARRMA Limitless V2 roller
ARRMA RC Car 1/7 Limitless V2 Speed Bash Roller (Requires Additional Products to Run), Clear, ARA7116V2
Best for: speed-run builders who understand the car is a roller
Avoid if: readers expecting a complete RTR with battery and charger
Verify required electronics, tires, batteries, charger, and radio before buying.
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Spektrum Firma 160A ESC
Spektrum Firma 160A Smart ESC with Capacitor 3S - 8S, SPMXSE1160CP, Black
Best for: builders matching separate ESC and motor components
Avoid if: buyers who have not checked connectors, voltage, or programming needs
Verify voltage, connectors, motor pairing, cooling, and programming.
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Spektrum Firma 1250Kv motor
Spektrum Firma Brushless Motor, 1250Kv, 6.5mm Bullet, SPMXSM1200
Best for: builders completing a speed-run electronics package
Avoid if: buyers who have not checked motor mount, shaft, gearing, and ESC pairing
Verify motor can, shaft, ESC compatibility, gearing, and cooling.
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Spektrum SR6200A receiver
Spektrum SR6200A DSMR 6-Channel AVC Surface Receiver, SPMSR6200A
Best for: drivers using a compatible Spektrum transmitter setup
Avoid if: drivers using a different radio protocol
Verify transmitter compatibility, AVC needs, antenna routing, and fail-safe.
Buy on AmazonBattery And Gearing Checks
The supplied battery listing should be treated as a single 4S pack, not a matched pair. Many high-power setups need matched packs, correct connectors, the right charger, and careful LiPo handling. Do not mix old and new packs or unknown capacities in a speed-run car.
Gearing is where speed-run mistakes get expensive. A taller pinion can add speed, but it also adds heat and load. Check motor temperature, ESC temperature, tire condition, braking distance, and run space before chasing bigger numbers.
Limitless battery and gearing checks
Spektrum 4S IC5 battery
Spektrum 14.8V 5000mAh 4S 100C Smart G2 Hardcase LiPo Battery: IC5, SPMX54S100H5
Best for: builders buying matching packs with known dimensions and connector needs
Avoid if: buyers assuming this is a pair or buying unmatched packs
Treat this as a single pack; verify pair needs, dimensions, connector, charger, and safety.
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ARRMA 32T Mod 1 pinion
ARRMA Pinion Gear, 32T Mod1 Safe-D5, ARA311137 Medium
Best for: drivers tuning gearing after temperature and run-space checks
Avoid if: drivers chasing speed before learning setup and safety
Verify bore, pitch, temperature, target gearing, and safe run space.
Buy on AmazonBefore choosing packs, read 2S vs 3S LiPo basics, RC battery connector types, and how to charge a LiPo battery safely.
How Fast Can It Go?
A mild street setup can be much slower than an experienced speed-run build, even if both use the same chassis. The useful answer is not one speed number. It is whether the electronics, batteries, gearing, tires, road, and driver are matched well enough to run safely.
FAQ
Is the ARRMA Limitless ready to run?
No. The Limitless is sold as a roller, so it needs electronics, batteries, radio gear, and setup work before it runs.
Should a beginner buy an ARRMA Limitless?
Usually no. It is better for experienced drivers who understand LiPo safety, gearing, road setup, and high-speed RC risk.
