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. Hobby trucks run from palm-sized 1/24 micro crawlers up to 1/6 and 1/5 giants close to three feet long, and 1/10 is the most common size. Treat scale as a rough guide, though. Two "1/10" trucks can differ by several inches, so read the listed dimensions before you buy.
How we put this together
The dimensions come from manufacturer listings on Amazon, checked October 3, 2026. When a listing's numbers look like the box instead of the vehicle, we left them out instead of guessing. 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. Traxxas's own listings put the 1/10 Slash 4x4 at 22.36 inches long and the 1/10 Bandit at 16.7 inches.
Brands blur it further. 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.
Use scale to narrow down the class. After that, compare the listed length and weight, plus width if storage is tight. Weight tells you 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?
Long grass and big rocks stop small scales. Large scales need room to run and room to stop; a 1/10 truck at 50 mph covers a football field in a few seconds. Fit the size to your space before anything else.
How will you carry it?
A micro crawler fits in a backpack and a 1/10 truck fits 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 want bigger, pricier LiPo packs, often two at a time, plus bigger chargers and more expensive parts. A spare battery for a micro crawler costs a small fraction of a pair of 4S packs for an X-Maxx.
Who's driving?
Younger drivers do best with small, slow vehicles. The makers rate the hobby-grade trucks above 14+, so for younger kids, start with 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 and tires are sized to the class, and so are motors, servos and batteries. A few exceptions are worth knowing.
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; make sure the listing names your exact model. Then there are the "1/10 driveline" small trucks: Traxxas describes the Mini Maxx as using 1/10-scale driveline components in a smaller chassis.
Batteries follow the tray and the connector, not the scale. A 2S pack that fits one 1/10 truck might not fit another, so measure the battery bay.
Motors show size following scale most clearly. Micro crawlers use tiny motors such as the 1721 size, 1/10 trucks commonly use 3650-class cans, and big trucks use far larger ones. Our motor KV guide decodes those size numbers.
Batteries by size class
Power climbs with scale. Micro crawlers run small 2S packs: Axial lists a 350 mAh pack for the SCX24, and Redcat a 750 mAh 2S pack for the Ascent-18. Small-scale bashers and 1/10 trucks run 2S or 3S. 1/8 trucks run 4S to 6S, and the giants run 8S, usually as two packs. A bigger pack stores 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 leave it unattended, and store packs at storage voltage (Traxxas Battery Basics).
Quick recommendations by size
- For desk and indoor crawling, the Axial SCX24. We compare it in SCX24 vs TRX-4M vs Ascent-18.
- For the backyard, the Arrma Mojave GROM 223S or Traxxas Mini Maxx.
- The all-round 1/10 pick is the Traxxas Slash 4x4 (our Slash 4x4 review).
- Big air in a 1/8: the Arrma Kraton 6S, compared in Kraton 6S vs X-Maxx.
Your first size, and your second
Start with a small-scale basher or a 1/10 truck. Both handle a yard or a park, fit in the car and don't cost a fortune to fix. Make your second truck a 1/18 or 1/24 crawler for the evenings and rainy days. Save 1/8 and the giants until you have the space, and the budget for the batteries.
Dimensions and weights from manufacturer listings, checked October 3, 2026. How we research · Affiliate disclosure