Head to head
Axial SCX24 vs Traxxas TRX-4M
The two small crawlers everyone ends up choosing between. They are closer than the spec sheets suggest, and the decision comes down to three things: how big it should be, whether it will be modified, and whether it needs to survive wet grass.
By Ryder M. · Published October 9, 2026 · Last reviewed
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Buy the Traxxas TRX-4M if the crawler is a gift, if it will be driven outdoors in real weather, or if you want parts available locally. Buy the Axial SCX24 if it needs to be as small as possible, if it will mostly live indoors, or if the owner is likely to upgrade it. Both are complete ready-to-run packages in the same price bracket, both include a battery and a USB charger, and both are genuinely good — this is not a comparison where one car wins. The TRX-4M is eleven inches long at 1/18 scale with waterproof electronics; the SCX24 is under eight inches at 1/24 with the largest upgrade aftermarket in the category.
Short version: TRX-4M for outdoors, weather and easy parts. SCX24 for the smallest possible crawler and the deepest upgrade path. If you cannot decide and it is a present, buy the TRX-4M — waterproof electronics and local spares make it the safer gift.
The comparison table
| Axial SCX24 | Traxxas TRX-4M | |
|---|---|---|
| Scale | 1/24 | 1/18 |
| Length | Under 8 inches | 11 inches |
| Chassis | 1/24 scale crawler chassis, licensed bodies | Steel ladder frame, solid axles, four-link suspension |
| Drivetrain | Full-time 4WD, brushed | Solid-axle 4WD, brushed |
| Electronics | Standard ready-to-run package | Waterproof ECM-2.5 with Sport, Trail and Crawl modes |
| Lights | Varies by body | LED lights fitted |
| In the box | Small LiPo and a USB charger | 7.4V 750mAh LiPo and a 2-amp USB charger |
| Maker's age guidance | 8+ | 8+ |
| Aftermarket | The largest in small-scale crawling | Growing, plus the full Traxxas spares network |
| Parts availability | Hobby shops plus a big third-party market | Local hobby shop shelves, next-day online |
| Best venue | A floor, a bookshelf, a rockery | A yard, a park, a gravel pile, wet grass |
Size is the first real decision
Eleven inches against under eight does not sound like much written down, and in practice it changes where the car can be used. The SCX24 at 1/24 is smaller than a shoe: it turns a flight of stairs, a bookshelf or a pile of firewood into a trail, and it is the only one of the two that is genuinely comfortable as an indoor vehicle year-round. The TRX-4M at 1/18 is small enough for a rockery or a flowerbed but big enough to cross a gravel driveway and climb a tree root without being stopped by it.
Put the other way round: every obstacle is scaled to the car. A sidewalk expansion joint is a step for the SCX24 and a bump for the TRX-4M. If the intended venue is outdoors, bigger is easier. If it is a living room floor, smaller is better, because a crawler needs obstacles to be interesting and a large crawler indoors runs out of them. Our guide to RC car scale sizes lays the whole scale ladder out in inches.
Waterproofing is the clearest win
The TRX-4M's electronics are sealed: Traxxas fits its waterproof ECM-2.5 module, which means damp grass, puddles, wet rock and light snow are all in bounds. This is the single most practical difference between the two cars, because crawling outdoors means wet ground far more often than bashing does — streams, mud, damp leaves, early mornings. A crawler that has to stay dry is a crawler with a much shorter list of places to go.
That is not a reason to avoid the SCX24; it is a reason to know where it belongs. An indoor and fine-weather crawler is exactly what a lot of people want, and the SCX24 is better at that job precisely because it is smaller. But if the honest answer to "where will this be driven" includes the word outside, the waterproofing tips the decision. Note that sealed electronics do not make the bearings, screws and metal parts rust-proof on either car — how to clean an RC car covers what still needs drying afterward.
Drive modes, and why they matter on a crawler
The TRX-4M's module offers Sport, Trail and Crawl settings, which change how the throttle responds rather than how fast the car goes. On a crawler that is more useful than it sounds: Crawl makes the throttle extremely gentle off the bottom, which is the whole skill of picking a line over an obstacle, and it is the difference between a child inching the truck up a rock and a child spinning the wheels at the base of it. The SCX24 has no equivalent mode selector and relies on the driver's own trigger control, which is a fair ask for an adult and a real one for an eight-year-old.
The aftermarket, and who it is for
This is the SCX24's strongest argument and it is a genuine one. Axial effectively created scale crawling, and the SCX24 has the largest upgrade market of any small crawler: brass weights to lower the center of gravity, metal axle housings, better servos, different wheels and tires, alternative bodies. If the person buying it is the kind of person who will be happier with a project than a product, that depth is worth more than any specification in the table above, and it is the reason Axial tops the best RC crawler brands.
The TRX-4M's answer is different: fewer third-party options, but the best factory spares distribution in the hobby. A broken Traxxas part is usually available locally and almost always available next day. For modification, Axial. For repair, Traxxas. Which of those two you need depends entirely on the owner, and it is worth being honest about which one they are before spending the money.
What they have in common
- Both are complete. A battery and a USB charger are in both boxes, which is rare and is the main reason either is a good first crawler.
- Both are brushed and slow. Crawling is about traction and line choice, not speed. Neither will ever be fast, and neither is the right gift for someone who asked for a fast RC car.
- Both are four-wheel drive and nearly uncrashable. The failure mode of a small crawler is tipping onto its roof, not breaking a part.
- Both are listed by their makers for ages eight and up.
- Both have small batteries. A spare pack is the first purchase for either — the TRX-4M's is 750mAh, which is minutes rather than an afternoon.
The third option worth knowing about
If this comparison is close and the appeal is the engineering rather than the brand, the FMS FCX24 Power Wagon belongs in the conversation. At 8.25 inches it is SCX24-sized, and it runs portal axles — which lift the axle housings clear of the rocks — plus oil-filled shocks and a two-speed transmission switched from the third radio channel. It arrives with a 7.4 volt 380mAh LiPo, a USB charger and a factory light kit. The catches are that the scale detail is fragile, the battery is tiny, and spares come from FMS dealers by mail order rather than a shelf. It is the most interesting of the three and the least safe as a gift.
The three crawlers in full
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  Traxxas TRX-4MThe small Traxxas crawler that arrives complete: battery, charger, waterproof electronics and a licensed body. | Crawling, complete in box | 9.0 | |
| 2 | Axial SCX24Under eight inches long, four-wheel drive, and it turns a living room floor into a trail. | Indoor crawling | 8.6 | |
| 3 |  FMS FCX24 Power WagonA 1/24 licensed scale crawler with portal axles and a two-speed gearbox, complete with battery and charger. | Scale looks, tiny space | 8.3 |
Illustrative photo — not this exact model.
#1 · Crawling, complete in box
Traxxas TRX-4M
The small Traxxas crawler that arrives complete: battery, charger, waterproof electronics and a licensed body.
9.0/10our score for this use
A 1/18 scale trail crawler eleven inches long, built on a steel ladder frame with solid axles and a four-link suspension — the layout of a real truck, shrunk. Traxxas fits its waterproof ECM-2.5 module with Sport, Trail and Crawl modes, and the box includes a 7.4 volt 750mAh LiPo and a 2-amp USB charger, so nothing else is needed on the day.
- Size:
- 1/18 (11 inches long)
- Drive:
- Solid-axle 4WD
- Motor:
- brushed motor
What it does well
- Battery and USB charger are in the box, which almost nothing else in the Traxxas range can say
- Waterproof electronics and LED lights, so wet grass and after-dark driving are both fine
- Small enough for a living room, a rockery or a stack of books — no field required
What it does badly
- Crawlers are slow by design. If the recipient wants speed, this is the wrong shape entirely
- The 750mAh pack is small; a second battery is the first thing most owners buy
- The licensed bodies are ABS plastic and will scuff on rock
Specifications from the Traxxas TRX-4M product page.
Illustrative photo — not this exact model.
#2 · Indoor crawling
Axial SCX24
Under eight inches long, four-wheel drive, and it turns a living room floor into a trail.
8.6/10our score for this use
A 1/24 scale crawler — smaller than a shoe — sold as several licensed bodies including Jeep, Ford Bronco, Chevrolet C10 and a Power Wagon. It is a complete ready-to-run package with a small LiPo battery and USB charger, and it crawls over table legs, stairs and garden rockeries at walking pace.
- Size:
- 1/24 (under 8 inches long)
- Drive:
- Full-time 4WD
- Motor:
- brushed motor
What it does well
- Small enough to use indoors year-round, which no other hobby-grade car on this site can claim
- Slow, so crashes barely exist — the failure mode is tipping over, not breaking
- A huge aftermarket of upgrade parts if the hobby sticks
What it does badly
- Tiny. If the person you are buying for wanted something impressive to look at, this is not it
- Not fast, and it never will be
- The included battery is small, so a spare pack is an obvious early purchase
Specifications from Axial's brand pages at Horizon Hobby.
Illustrative photo — not this exact model.
#3 · Scale looks, tiny space
FMS FCX24 Power Wagon
A 1/24 licensed scale crawler with portal axles and a two-speed gearbox, complete with battery and charger.
8.3/10our score for this use
FMS builds small, detailed, licensed crawlers. The Power Wagon is 8.25 inches long, runs portal axles, oil-filled shocks and a two-speed transmission switched from the third radio channel, and arrives with a 7.4 volt 380mAh LiPo and a USB charger.
- Size:
- 1/24 (8.25 inches long)
- Drive:
- Portal-axle 4WD
- Motor:
- brushed motor
What it does well
- Portal axles and a two-speed gearbox at 1/24 scale is genuinely unusual engineering
- Works on a desk, a bookshelf or a flowerbed — the smallest realistic venue of anything here
- Battery, charger and a factory light kit are all included
What it does badly
- At 1/24 it is a display piece as much as a toy; small hands break the scale details
- Spares come from FMS dealers by mail order, not from a local hobby shop shelf
- The 380mAh battery is tiny — plan on buying spares
Specifications from the FMS FCX24 Power Wagon page.
Which one, in one question each
- Will it be driven outside? Yes, in any weather: TRX-4M. Mostly indoors and on dry days: SCX24.
- Is it a gift for someone who has never owned an RC car? TRX-4M. Waterproof, complete, drive modes, local spares — the fewest ways for the first week to go wrong.
- Will the owner want to modify it? SCX24, without hesitation. The aftermarket is the reason.
- Is space genuinely tight? SCX24 at 1/24, or the FMS FCX24. Both work on a desk.
- Does it need to be impressive to look at? Neither, honestly. Both are small. The best RC monster trucks is the page for visual impact.
How we assessed this
Feature by feature from each manufacturer's own published specification — scale, length, chassis layout, electronics, drive modes and what is in the box — all linked in Sources. Where neither maker publishes a figure, we have left it out rather than estimated it, which is why there is no top speed row in the table: crawler speed is not a specification either company leads with and we have not measured it. No price figures appear anywhere on this site; every buy control links to the live retailer listing. We do not test these products first-hand, and our methodology page explains exactly what that means.