RC car guides
Quick answer
Start with motor KV explained and how to calculate RC car gear ratio: together they explain almost every speed and heat question in the hobby.
The upgrade that matters
ISDT Lipo Battery Balance Charger 608AC - 8A/200W AC/DC Smart
- 6S
A real balance charger: faster, safer charging than the USB charger in most boxes.
$64.50 listed price, changes often
Check price on AmazonHow Fast Do RC Cars Go?Real top speed ranges for RC cars by class, from 10 mph toy grade to 100+ mph speed-run builds, plus the math that actually determines how fast a car will run.How Long Does an RC Car Battery LastA 5000mAh 2S pack lasts about 10 to 16 minutes depending on how hard you drive. Full runtime table by battery size and average draw below.How to Calculate RC Car Gear RatioFinal drive ratio equals spur teeth over pinion teeth, times the internal gearbox ratio. Full worked example with real numbers below.How to Change a Pinion Gear on an RC CarStep by step instructions for how to change gear ratio on an RC car: matching pinion pitch, the paper gear mesh method, and torque versus top speed tradeoffs.How to Charge RC Car LiPo BatteriesBalance leads, 1C charge times, iD chargers, and storage voltage for RC car packs specifically, not general LiPo care.How to Choose Your First RC CarA beginner's guide to your first RC car: toy grade vs hobby grade, scale, brushed vs brushless motors, RTR kits, and parts support before you buy.RC Car Motor Turns vs KVBrushed motors are rated in turns, brushless motors in KV. Here is the approximate crossover, and why it is only ever approximate.RC Car Battery Connector TypesTraxxas TRA/iD, EC3, EC5, XT60, XT90, and Deans, explained: which cars use which, and why adapters are a bad idea at high current.RC Car Gear Ratio ExplainedThe best gear ratio for an RC car trades top speed against acceleration and motor heat. Pinion vs ratio chart and how to pick, below.RC Car Maintenance After Every RunA quick post-run checklist for any RC car: bearings, shock oil, loose screws, and how to store and charge the LiPo battery so it's ready for next time.RC Crawler Overdrive vs UnderdriveWhat overdrive and underdrive mean on an RC rock crawler, typical front-to-rear axle speed percentages, and why crawlers run low KV motors with deep gearing.RC Car Motor KV ExplainedKV is unloaded RPM per volt. Multiply KV by pack voltage to see why a 3500KV motor on 2S spins slower than a 1400KV motor on 6S.RC Motor Temperature GuideHow hot is too hot for an RC motor: the 5 second finger test, infrared thermometer readings, commonly cited safe ranges for brushed and brushless motors, and when to gear down.What KV Motor for an RC Car?How to choose the right KV motor for your RC car by scale and cell count, with a KV-by-scale reference table and the RPM math behind the decision.What Scale RC Car Should I GetFrom 1/24 mini crawlers to 1/5 monsters, typical scale sizes and who each one actually fits, with straight talk on what to skip.
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RCCarCalc is researched guidance, not professional advice. Figures come from published manufacturer specifications, listings and verified owner reports, not hands-on testing. Speeds are theoretical or as listed; real results depend on gearing, battery, tires and terrain. See how we research.