RC Car Scales Explained (1/10 vs 1/8 vs 1/16)

1/24 scale: 6–8 inches long. These are desktop-sized micro cars. The Axial SCX24 Deadbolt is the most popular, a tiny crawler that fits in your hand and can crawl over books and couch cushions. Great for indoor use.

1/18 scale: 8–12 inches long. A step up from micro. The Traxxas TRX-4M Defender fits here. Small enough for indoor driving but capable on outdoor trails. These are excellent first crawlers.

1/16 scale: 10–14 inches long. Mid-range small cars. Less common as a dedicated category, but Traxxas offers 1/16 versions of popular models.

1/10 scale: 17–22 inches long. The most popular scale in the hobby by a wide margin. The Traxxas Slash 4X4, Arrma Senton 3S, and most competition buggies are 1/10 scale. Parts are easy to find, tracks are designed for this size, and they're big enough to be exciting but small enough to transport easily.

1/8 scale: 19–24 inches long. Noticeably bigger and heavier than 1/10. The Arrma Kraton 6S BLX and Traxxas E-Revo 2.0 live here. More power, more presence, more expensive parts. These trucks are serious machines.

1/5 scale: 30+ inches long. Massive. The Traxxas X-Maxx 8S stretches nearly 30 inches and weighs almost 20 lbs. These are expensive to buy and maintain, but nothing else matches the visual impact of a 1/5 scale monster truck sending it off a ramp.

Larger scale means more weight, more momentum, and more expensive parts when something breaks. A 1/8 scale truck crashing at 40 mph hits a lot harder than a 1/10 scale car at the same speed. Replacement arms, shocks, and chassis parts can cost 2–3x more at 1/8 scale.

Bigger cars also need more space to drive. A 1/10 basher works fine in a suburban backyard. A 1/5 scale truck needs a park or a field. It's genuinely dangerous in a small area.

Storage and transport matter too. A 1/10 car fits easily in a car trunk. A 1/5 scale truck might need the back seat.

Scale doesn't directly determine speed, but there's a loose correlation. Micro cars (1/24, 1/18) typically run 10–25 mph. Standard 1/10 cars range from 30–60+ mph. Large-scale 1/8 and 1/5 vehicles can exceed 50–70 mph with powerful electronics. Then there are the outliers. The Traxxas XO-1 (1/7 scale) exceeds 100 mph, and the Arrma Limitless V2 (also 1/7) is built specifically for 100+ mph speed runs.

For most people, 1/10 scale is the right choice. It's the most supported scale with the widest selection of cars, the best parts availability, and the most racing classes if you decide to compete. Nearly every major brand's best-selling models are 1/10 scale.

Go 1/24 or 1/18 if you want indoor driving, have limited space, or want a budget-friendly entry point. Go 1/8 scale if you want a bigger, more powerful basher and have the space (and budget) for it. Go 1/5 scale only if you're committed to the hobby and want the ultimate in size and presence.