1/8 vs 1/10 vs 1/5: RC Scale Explained

Browse RCs for five minutes and you'll see scale numbers thrown around: "1/10 Slash", "1/8 Kraton", "1/5 X-Maxx." These aren't arbitrary product codes — they're precise ratios of the RC to an imagined real-world vehicle. Understanding what this actually means changes what you should buy.

What the numbers mean

A 1/10 scale RC is 1/10th the size of an imaginary full-size vehicle of that type. So a 1/10 scale truck is about 20 inches long, where a real truck is about 200 inches long.

The most common scales in RC:

• 1/24: Micro. Pocket-sized trucks and crawlers. Around 8 inches long.
• 1/18 and 1/16: Small. Dresser-top size. Great for indoor use.
• 1/10: The standard size. ~20 inches long. Most hobby-grade RCs are 1/10.
• 1/8: Large. ~22-24 inches. More mass, more presence.
• 1/7: Extra large. ~30 inches. Arrma's "speed truck" scale.
• 1/5: Largest common scale. 30+ inches. Needs a whole room to store.

How scale affects everything

Cost

Bigger scale = more material = higher price. A 1/10 RTR typically costs $300-500; a 1/8 runs $500-900; a 1/5 starts around $800 and goes to $1500+.

That's just the truck. Consumables scale too:

• Batteries: 1/10 runs on 2S-3S (~$60 each). 1/5 runs on 8S (~$250 for a pair).
• Tires: 1/10 tires are $40/set, 1/5 tires can be $150-200/set.
• Parts: bigger = more expensive parts across the board.

A 1/5 truck costs 3-4x as much to own per year as a 1/10.

Durability vs fragility

Counterintuitively, bigger isn't always tougher. Physics:

• Small trucks crash slower (same speed looks faster on a smaller truck)
• Small trucks have less momentum, so impacts transfer less force
• But small trucks use smaller, thinner parts that fail earlier

The Kraton 8S (1/5) is a tank, but one bad crash can still bend an aluminum chassis. A 1/10 Slash 4x4 often survives nastier crashes just because there's less energy at play.

Realistically, medium scales (1/10, 1/8) are the toughest per dollar.

Driving style

Scale drastically changes how a truck drives:

• 1/24-1/16: Fast reactions needed, twitchy, exciting in small spaces. Can be intimidating indoors.
• 1/10: Sweet spot. Maneuverable on sidewalks, but feels substantial.
• 1/8: Noticeably more planted. Tracks straight better at speed. Needs more room to turn.
• 1/7-1/5: Feels like you're piloting something — slower reactions, lots of presence. Needs an open field.

Space requirements

This is the most underestimated factor.

• 1/10 runs great on a sidewalk, tennis court, or small dirt lot
• 1/8 needs a parking lot or a big backyard
• 1/5 needs an open field or a park

If your run spot is a driveway, don't buy a 1/5. Period. You won't enjoy it.

Storage matters too. A 1/5 X-Maxx is roughly the size of a stack of two large pizza boxes. Figure out where it lives before you buy.

Transport

• 1/10 fits in a duffel bag
• 1/8 needs a proper RC bag or the back seat of a sedan
• 1/5 fills a car trunk by itself

If you plan to take it to different locations, this matters.

Scale by category

Each category of RC has "standard" scales:

Crawlers

• 1/24 (Axial SCX24, for beginners/indoor)
• 1/18 (Element Trailrunner)
• 1/10 (standard — SCX10 III, TRX-4, Enduro)
• 1/6 (Axial SCX6, big specialty)

Bashers

• 1/10 (Rustler, Stampede, Granite)
• 1/8 (Kraton 6S, Notorious)
• 1/5 (Kraton 8S, X-Maxx)

Short Course / Off-Road

• 1/10 (Slash 4x4, Traxxas Slash)
• 1/8 (Associated RC8B, race-focused)

Drift

• 1/10 (Yokomo YD-2, MST RMX, all mainstream drift)

Monster Trucks

• 1/8 (Losi LMT, ECX Ruckus)

Deviating from the standard for a category usually means paying more for less aftermarket support.

What I'd actually recommend

• Your first RC: 1/10. Period. Huge aftermarket, manageable cost, good size.
• Second RC, different category: same scale if possible, so batteries and chargers overlap.
• Third RC, wanting more spectacle: 1/8 or 1/5. Only if you have real space and budget for it.

Don't go 1/5 first. The sticker shock on batteries and tires will make you regret the purchase before you even enjoy the performance.

The scale that grew up with the hobby

1/10 is the dominant scale for a reason. It emerged from RC racing in the 80s and has had 40 years of optimization. Every major brand has multiple 1/10 platforms. Every hobby shop stocks 1/10 parts. If you want the easiest hobby experience, 1/10 is it.

1/8 has had a renaissance in the past decade thanks to Arrma — it's now nearly as well-supported as 1/10, with the advantage of feeling more substantial.

1/5 is niche. Amazing when you have the space and budget, but it's specialist territory.

Bottom line

If you're unsure, pick 1/10. It's the right answer for most people. Move up in scale later when you have a specific reason (like "I want the biggest basher there is" or "I have a ranch to drive on").

Size isn't the hobby. Quality of the platform is. A well-built 1/10 is better than a compromised 1/5 every day of the week.