Traxxas didn’t go with licensed replica tires for the
TRX- 4, but they sure look like they could be full-size
truck tires. The Canyon Trail tread design is directional
and wraps its tall lugs onto the sidewalls for extra grip.
The tires are molded in Traxxas’ soft “S1” compound,
and the durometer feels a couple of steps softer than
most RTR trail tires we’ve encountered. “Trail-tuned”
inserts are installed, but we didn’t get a peek at them
since the tires are glued to the 1.9-inch wheels. The
hoops get bead-lock styling and have a tough, full-size
aftermarket look, and they mount to standard 12mm
hexes. The TRX- 4 also accepts aftermarket 1.9-inch
wheels with no clearance issues.
Nice-lookin’ rubber—soft, too.
How fast is it?
Trail-truck speed is usually too slow to bother mentioning, but the
TRX- 4’s High/Low transmission makes it a point of interest. With a 2S LiPo
onboard, you’re looking at 7mph and 3mph in High and Low, respectively;
with a 3S pack, speed bumps up to 11mph and 5mph. It’s not blazing fast
compared to a short-course or stadium truck, obviously, but High gear is
handy when traversing open terrain between more challenging sections.
Shifts are seamless—just flip the rocker switch on the radio. Even in High,
the TRX- 4 is all about torque. Stand on the gas and it’ll wheelie.
Being able to unlock the differentials is a big help, especially on grippy
surfaces that don’t allow tire slip to take the place of differential action.
You’ll also find that open diffs tighten up the TRX- 4’s turning radius. The
T-Lock tech is well proven in the Summit, and it works just as well in the
TRX- 4. Flip the T-Lock switch, and the diffs lock or unlock as commanded
every time. You probably won’t find a lot situations where the “only front
axle locked” setup offers an advantage over locking both axles, but it
is fun to hit the same line with open diffs, front locked, and both axles
locked to see how the truck performs. Or try different diff settings just to
challenge yourself. It’s a fun feature that makes wheeling the TRX- 4 even
more like full-size off-roading.
If you like to hike with your trail truck or need to walk any distance to
get to your favorite spot, you’ll love Cruise Control. Instead of holding
the trigger down to keep the TRX- 4 rolling, you just feed in the amount
of throttle you want, then hit the transmitter’s Set button. That locks
in the throttle position, so you can take your finger off the trigger. If
you want to dial in more or less throttle, just twist the Multi-Function
Knob. Tap the brakes and Cruise Control returns throttle control to
the trigger. Holding a trigger doesn’t seem like a big deal, but you’ll
be surprised how much nicer it is to let Cruise Control do the work. It
When it’s time to drop into Low, lock the diffs, and go to work, the TRX- 4
is a very good crawler—but removing the spare tire is recommended
for maximum extreme-terrain performance. The spare represents 130g
(that’s more than a quarter pound) of weight where it’s wanted least,
and the extra heft makes the front end light. The tire doesn’t do you any
favors, either, when the grippy rubber drags over obstacles. The TRX- 4
has ample torque and generates a ton of grip from its soft S1 rubber. The
truck’s 45-degree steering travel is a big help, and the steering servo
also performs well, particularly for an RTR stocker. The body is still pretty
weighty even without the spare tire, so extreme angles and sidehilling
were a little sketchy—although I bet a full-size Defender couldn’t handle
the angles that the TRX- 4 was achieving. Switching to a plain Lexan body
lowered the truck’s center of gravity considerably and made the TRX- 4
feel as capable as my comp rig. A big part of that comes from the portal
axles. When I got down low to shoot the action shots for this review, it
was easy to visualize where the diff housing would have been if the TRX- 4
had standard axles—and the countless times it would have gotten hung
up but didn’t because the portals held the diffs up high.
Driving the trX- 4
There’s no scale 4X4 eXperience more
versa Tile or “real” Than This.