RC scale is a fraction of the real vehicle's size: 1/10 means one-tenth, 1/24 means one twenty-fourth. The smaller the number after the slash, the bigger the model. Most hobby trucks fall between palm-sized 1/24 micro crawlers and giant 1/6 to 1/5 trucks close to three feet long, with 1/10 the most common size. But scale is only a guide: two "1/10" trucks can differ by several inches, so check the listed dimensions before you buy.
How we put this together
The dimensions below come from manufacturer listings on Amazon, checked October 3, 2026. Where a listing's dimensions look like box size rather than vehicle size, we leave them out rather than guess. How we research.
RC scale size chart
| Scale | Typical vehicles | Where it works | Examples |
|---|---|---|---|
| 1/30–1/24 | Micro crawlers | Desks, carpet, small patios | Axial SCX30, Axial SCX24 |
| 1/18 | Mini crawlers, budget bashers | Indoors, yards, gravel | Traxxas TRX-4M, HAIBOXING 18859 |
| 1/16–1/12 | Small-scale bashers | Backyards, parks, skate parks | Arrma Mojave GROM, Traxxas Mini Maxx |
| 1/10 | Short course, buggies, monster trucks, crawlers | Parks, tracks, trails | Traxxas Slash 4x4, Traxxas TRX-4 Sport |
| 1/8 | 6S bashers, buggies | Big fields, BMX tracks | Arrma Kraton 6S, Traxxas Sledge |
| 1/7–1/5 | Giant 8S trucks | Very large open spaces | Traxxas X-Maxx, Arrma Kraton 8S |
Why "1/10" doesn't mean one size
Scale is a ratio to the real vehicle, and real vehicles vary. A 1/10 short course truck copies a full-size desert race truck; a 1/10 buggy copies a much smaller off-road buggy. In Traxxas's own listings, the 1/10 Slash 4x4 is 22.36 inches long and the 1/10 Bandit is 16.7 inches. Brands also blur the lines: Traxxas lists the Mini Maxx as 1:12 scale while describing its "1/10 scale power and driveline", and the X-Maxx is listed at 1:6 even though people often call it 1/5.
So use scale to narrow the class, then compare listed length, width and weight. Weight matters as much as length: the Mini Maxx is listed at 3.6 pounds, the Slash 4x4 at 5.8 pounds and the Sledge at 12.7 pounds.
How to choose a size
Where will you drive?
Small scales are stopped by long grass and big rocks; large scales need room to run and stop. A 1/10 truck at 50 mph covers a football field in a few seconds. Match the size to your space first.
How will you carry it?
Micro crawlers fit in a backpack. 1/10 trucks fit on a car seat. A giant 8S truck takes most of a trunk.
What will it cost to run?
Running costs climb steeply with size. Bigger trucks need bigger, more expensive LiPo packs (often two at a time), bigger chargers and pricier parts. A micro crawler's spare battery is a small fraction of the cost of a pair of 4S packs for an X-Maxx.
Who's driving?
Younger drivers do best with small, slow vehicles. The hobby-grade trucks above are rated 14+ by their makers. For younger kids, see the best RC car for kids.
Size words you'll see in listings
| Term | What it usually means |
|---|---|
| Micro | 1/24 to 1/30 and smaller, often crawlers (SCX24, SCX30) |
| Mini | Roughly 1/18 to 1/12; a scaled-down version of a bigger model (TRX-4M, Mini Maxx, Mini Kraton) |
| Small scale / GROM | Arrma's name for its compact 1/16-class bashers |
| SCT | Short course truck, usually 1/10 (Slash) |
| 1/8 buggy / truggy | Larger, 4S–6S off-road racers and bashers |
| Large scale | 1/6 and 1/5 giants (X-Maxx, Kraton 8S) |
Do parts fit across scales?
Mostly no. Wheels, tires, motors, servos and batteries are sized to the class. A few exceptions are useful to know:
- Micro crawler parts sometimes cross between 1/24 and 1/18. Some beadlock wheel and tire sets on Amazon are sold for both the SCX24 and TRX-4M; always check the listing names your exact model.
- "1/10 driveline" small trucks. Traxxas describes the Mini Maxx as using 1/10-scale driveline components in a smaller chassis.
- Batteries are about the tray and connector, not the scale. A 2S pack that fits one 1/10 truck might not fit another; measure the battery bay.
Motors are the clearest example of size following scale: micro crawlers use tiny motors such as the 1721-size, 1/10 trucks commonly use 3650-class cans, and big trucks use much larger motors. Our motor KV guide explains those size codes.
Batteries by size class
Power climbs with scale. Micro crawlers run small 2S packs (Axial lists a 350 mAh pack for the SCX24; Redcat a 750 mAh 2S pack for the Ascent-18). Small-scale bashers and 1/10 trucks run 2S or 3S packs. 1/8 trucks run 4S to 6S, and giants run 8S, usually as two packs. Bigger packs store much more energy, so the LiPo rules matter more as you move up: charge on a fire-safe surface or in a LiPo bag, never unattended, and store at storage voltage (Traxxas Battery Basics).
Quick recommendations by size
- Desk and indoor crawling: the Axial SCX24. See SCX24 vs TRX-4M vs Ascent-18.
- Backyard bashing: the Arrma Mojave GROM 223S or Traxxas Mini Maxx.
- All-round 1/10: the Traxxas Slash 4x4; see our Slash 4x4 review.
- Big-air 1/8: the Arrma Kraton 6S; compared in Kraton 6S vs X-Maxx.
The bottom line
Read scale as "how much smaller than the real thing," not as a size. Choose your class by where you'll drive and how you'll carry it, then compare listed dimensions and weight. For most people, a small-scale basher or a 1/10 truck is the right first size, and a 1/18 or 1/24 crawler is the right second one.
Dimensions and weights from manufacturer listings, checked October 3, 2026. How we research · Affiliate disclosure