Quick Fact
Ultra4 trucks usually max out around 24 inches (61 cm) of front travel and can hit 36 inches (91 cm) in back, though that varies with the chassis and suspension setup.
Where do Ultra4 trucks really prove themselves?
These aren’t your average weekend trail rigs — Ultra4 vehicles are built for one thing: surviving brutal off-road endurance races. The sport’s main stage sits in the high desert near Johnson Valley, California, a massive 600-square-mile dry lake bed that hosts the legendary King of the Hammers (KOH) every February.
(Honestly, if you want to see what these trucks can do, this is the place.) The terrain here is perfect for testing suspension limits: hard-packed dry lake beds for speed, rock-strewn canyons for technical crawling, and steep granite washes that push every component to the edge. Throw in 2,800 feet of elevation and a dry climate, and you’ve got a recipe for world-class racing. Nearby Echo Mountain adds even more rock-crawling challenges for good measure.
How much suspension travel do Ultra4 trucks actually have?
That travel isn’t just for show — it’s what lets these trucks clear ledges, soak up whoops, and keep all four wheels planted when the terrain gets wild. Of course, exact numbers shift depending on the chassis and suspension setup. Some builders push even further, especially in the rear, where long-travel trailing arms and 4-link systems give racers that extra edge.
What kind of suspension setup do these trucks use?
Up front, you’ll usually find a beefy independent setup with multiple A-arms for maximum articulation. In the back, most racers go with either a 4-link or a long-travel trailing arm design — both give that extra rear-wheel movement you need when you’re hitting whoops or climbing ledges. Chassis choices vary too: some stick with boxed steel frames for durability, while others go for tubular chromoly or hybrid setups for weight savings and strength.
How wide are Ultra4 trucks on average?
That width helps with stability, especially when you’re pushing through deep sand or crawling over uneven rock. It’s a sweet spot — wide enough to stay planted, but not so wide that it becomes a hassle on tight trails.
What’s the typical wheelbase for an Ultra4 truck?
That range gives racers enough room for long-travel suspension without making the truck too cumbersome. It’s a Goldilocks zone: short enough to twist through tight canyons, long enough to keep things stable at speed.
What size tires do Ultra4 trucks run?
Big tires aren’t just for looks — they’re essential for flotation in sand and grip on loose rock. Racers often push the limits here, especially in the rear, where wider rubber helps claw through deep whoops and uneven terrain.
How heavy is an Ultra4 truck in the Unlimited class?
That’s not light, but it’s a necessary trade-off for the durability and performance these trucks demand. Every pound matters when you’re trying to keep suspension travel smooth and components from failing under extreme stress.
Where did Ultra4 racing even come from?
It all started with the King of the Hammers event in 2007, which quickly became a proving ground for modified 4x4s trying to conquer both the fast, sandy washes of Means Dry Lake and the gnarly granite faces of Cougar Buttes. Racers wanted something more challenging than pure rock crawling or desert racing — so Ultra4 was born. These trucks evolved from weekend warrior rigs into full-on race machines, packing custom long-travel suspension and parts from specialists like Currie Enterprises and Sway A Bar.
Today, the sport spans everything from the production-based 4WP Every Man Challenge to the unrestricted 4400 Unlimited class. That range keeps things accessible for hobbyists while pushing top-tier engineering to new limits.
How popular is Ultra4 racing now?
That growth is no accident. Streaming platforms like YouTube and Floatplane have turned Ultra4 into must-watch content, pulling in fans who wouldn’t normally tune into off-road racing. The sport’s mix of raw power, technical skill, and desert grit makes for great viewing — and it’s only getting bigger.
When and where is the next King of the Hammers?
This isn’t just another race — it’s the Super Bowl of Ultra4. The event spans multiple days, with qualifiers, races, and plenty of off-track action. If you’re serious about off-road racing, this is where you want to be.
How do I get tickets for King of the Hammers?
General admission covers the main event, but if you want to camp on-site at Hammertown, you’ll need a wristband pass — and those sell out fast. Kids 10 and under get in free, which makes it a great family outing. Don’t wait too long — these things disappear faster than a trophy truck on a dry lake.
What’s Hammertown, and where is it?
This is where racers, fans, and vendors all converge. You’ll find limited RV hookups, portable toilets, and plenty of vendors selling everything from recovery gear to cold drinks. Just don’t expect luxury — this is hardcore desert racing, after all. If you’re camping, dispersed BLM sites nearby offer more space, but always check fire restrictions, especially in late winter.
How do I get to Johnson Valley for the race?
From ONT, hop on CA-60 east to I-15 north, then take CA-247 straight to Landers. Just remember: once you leave pavement, a high-clearance or 4x4 vehicle is practically mandatory. The roads out there aren’t kind to low-riders.
What should I bring to King of the Hammers?
Temperatures can still hit 70°F in February, and those Ultra4 trucks are loud — we’re talking 110+ decibels during races. Bring gloves, a winch, and a kinetic rope if you’re participating, and always double-check BLM Johnson Valley updates before you head out. Safety gear isn’t optional — it’s survival gear.
Are there any special rules for spectators?
That wristband isn’t just for show — it’s your ticket to Hammertown and all the on-site action. Kids under 10 get in free, which is a nice bonus for families. Just don’t expect to sneak in without one — security’s tight, and for good reason.
Can I camp at King of the Hammers?
If you want the full experience, camping at Hammertown puts you right in the middle of the action. RV spots are limited, so arrive early. For more elbow room, BLM land around Johnson Valley allows dispersed camping, but always check fire rules before you light a stove or build a campfire. The desert’s beautiful, but it’s also fragile.
What’s the best way to prepare for an Ultra4 event?
These events push trucks — and drivers — to the limit. Make sure your suspension is dialed in for maximum travel, pack a full recovery kit, and double-check your rig for weak points. Oh, and don’t forget the basics: water, protection, and a way to stay informed on trail conditions. Preparation isn’t just recommended — it’s mandatory.
