Arrma Big Rock 3S BLX vs Traxxas Stampede 4X4 VXLWhich Should You Buy?

The Arrma Big Rock 3S BLX and Traxxas Stampede 4X4 VXL sit right in the middle of the hobby's price range: affordable, brushless, 4WD, and fun right out of the box. The Stampede wins the speed contest at 65 mph versus the Big Rock's 50 mph. That's a 30% speed advantage, which is substantial and impossible to ignore. Both run 3S brushless systems, so the Stampede is just extracting more from its power platform through gearing and motor KV differences.

Size tells a different story entirely. The Big Rock measures 20.47 inches long and 14.57 inches wide with a 12.91-inch wheelbase. The Stampede is notably smaller at 16.34 inches long, 12.75 inches wide, and a 10.24-inch wheelbase. The Big Rock's larger footprint gives it better stability, especially over rough terrain. It just looks and feels like a more substantial truck sitting on the ground. Side by side, the Stampede looks undersized next to the Big Rock, which matters if visual presence is important to you. Ground clearance slightly favors the Stampede at 2.75 inches versus the Big Rock's 2.05 inches, which is a meaningful 0.7-inch advantage for clearing obstacles and running over rough ground.

Weight is close: the Big Rock at 6.77 lbs versus the Stampede at 6.95 lbs. The Stampede is actually a touch heavier despite being smaller, which speaks to its denser construction. Both trucks are waterproof and run 4WD brushless drivetrains. The Stampede uses Traxxas's VXL-3s ESC and Velineon motor, a proven and well-supported combination. The Big Rock uses Arrma's BLX system, equally reliable with strong aftermarket support. Driving feel differs between them, with the Stampede feeling more aggressive and eager while the Big Rock feels more composed and planted.

Battery compatibility differs in a meaningful way. The Big Rock ships expecting a 3200mAh 3S pack, while the Stampede accommodates a 5000mAh 3S out of the box. This means the Stampede can run longer per session with a larger battery without modification. You can run bigger packs in the Big Rock too, but the stock tray is sized for smaller batteries. If you already own 5000mAh 3S packs from another truck, the Stampede is the plug-and-play option.

With a meaningful price gap, the Big Rock saves you a good amount and gives you a bigger, more stable truck. The Stampede costs more but goes 15 mph faster and has better ground clearance. Both are excellent trucks backed by major brands with deep parts bins. The Big Rock is the better value on pure dollars-to-capability ratio. The Stampede is the better choice if speed matters most and you don't mind paying for it.

Parts and support tip slightly toward Traxxas, which has the widest dealer network in the hobby. But Arrma's support has improved significantly through Horizon Hobby, and finding Big Rock parts is easy at any hobby shop or online retailer. Neither truck will leave you stranded for replacement parts after a hard crash. Both trucks have dedicated online communities where owners share tips, upgrades, and driving techniques. You'll find support no matter which platform you choose.