Arrma Big Rock 3S BLX vs Traxxas Stampede 2WD VXLWhich Should You Buy?

At nearly the same price the Arrma Big Rock 3S BLX and Traxxas Stampede 2WD VXL are practically the same price. But drive them back to back and they feel like completely different machines. The Stampede 2WD blasts to 65 mph, a full 15 mph faster than the Big Rock's 50 mph. That speed gap comes from the Stampede sending all its power to two wheels instead of four, meaning less drivetrain loss and more energy reaching the ground. The Stampede's lighter weight at 5.51 lbs versus 6.77 lbs also helps it accelerate faster pound-for-pound.

The trade-off is traction. The Big Rock's 4WD system hooks up on every surface. Grass, dirt, gravel, loose sand, wet pavement, the Big Rock just digs in and goes. The Stampede's 2WD sends power to the rear only, which means wheelspin on loose surfaces and a rear end that wants to step out under hard throttle. On pavement, the Stampede is manageable and really fun with its oversteer-happy personality. On anything loose, it becomes a drifting, spinning handful that requires constant throttle management. Some people love that challenge. Most people find it frustrating after the first few sessions.

Size is significantly different. The Big Rock is 20.47 inches long and 14.57 inches wide. The Stampede is 16.34 inches long and 12.75 inches wide. The Big Rock looks and feels like a much bigger truck because it is. Its 12.91-inch wheelbase versus the Stampede's 10.24 inches means better stability over bumps and at speed. The Stampede is lighter at 5.51 lbs versus 6.77 lbs, which partially explains its speed advantage but also contributes to its twitchy handling at the top end.

Ground clearance favors the Stampede at 2.75 inches compared to the Big Rock's 2.05 inches. That's a meaningful 0.7-inch advantage. Combined with its lighter weight, the Stampede actually handles small obstacles well despite its 2WD limitation. It bounces over things rather than plowing through them, which is a different kind of capability.

Battery considerations matter for long-term enjoyment. The Stampede takes 5000mAh 3S packs, giving it excellent runtime per charge. The Big Rock specs 3200mAh 3S, which means shorter sessions unless you upgrade your battery. Both run the same 3S voltage, so batteries are interchangeable if they physically fit the tray. Both trucks are waterproof, though the Stampede's 2WD means you'll get more wheelspin in wet conditions.

The 2WD Stampede is mechanically simpler. No front differential, no front driveshaft, no front CV joints. Fewer parts to break, fewer parts to maintain, and a simpler drivetrain to work on. For beginners who want easy maintenance, the Stampede's simplicity has real value. When something breaks, diagnosis is faster and repairs are easier. The Big Rock's 4WD system adds complexity and additional wear points, though the parts are all proven and readily available.

For a few dollars more, the Big Rock gives you 4WD grip and a substantially bigger platform. For a few dollars less, the Stampede gives you 15 mph more speed and mechanical simplicity. If you drive off-road, the Big Rock's 4WD is essential. If you drive on pavement and want speed, the Stampede is really faster and more thrilling. Most people should get the Big Rock because most people end up driving off-road at some point, and 2WD frustration on loose surfaces is very real.