Rock crawling is an extreme form of

off-road Off-roading is the act of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, or other natural terrain. Off-roading ranges from casual drives with regular vehicles to competitive events w ...

driving using specialized vehicles ranging from stock to highly modified, to overcome obstacles. In rock crawling, drivers typically drive highly modified

four-wheel-drive A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case provi ...

vehicles such as

truck A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construct ...

Jeeps Jeep is an American automobile brand, now owned by multi-national corporation Stellantis. Jeep has been part of Chrysler since 1987, when Chrysler acquired the Jeep brand, along with other assets, from its previous owner, American Motors Cor ...

, and " buggies" over very harsh terrain. Driving locations include boulders, mountain foothills, rock piles, mountain trails, etc. Rock crawling is about slow-speed, careful and precise driving, and high torque generated through large gear reductions (100:1 or more) in the vehicle's drivetrain. Rock crawlers often drive up, down and across obstacles that appear impassable. Rock crawling competitions range from local events to national series. These consist of long courses with obstacles set up with gates, similar to a slalom ski race.

Rock crawling basics

Vehicles

Vehicles commonly used include Jeep (the Chrysler and the Mitsubishi Varieties),

Lada Niva The Lada Niva Legend, formerly called the Lada Niva, VAZ-2121, VAZ-2131, and Lada 4×4 (), is a series of four-wheel drive, small (hatchback), and compact (wagon and pickup) Off-road vehicle, off-road cars designed and produced by AvtoVAZ sinc ...

, BAW,

Nissan Patrol The is a series of off-road vehicles and full-size SUVs manufactured by Nissan in Japan since 1951 and sold throughout the world. It is Nissan's longest running series of models. The Patrol has been available as either a short-wheelbase (SWB) ...

Toyota Hilux The , stylised as HiLux and historically as Hi-Lux, is a series of pickup trucks produced and marketed by the Japanese automobile manufacturer Toyota. The majority of these vehicles are sold as a pickup truck or cab chassis, although they coul ...

Toyota Land Cruiser The , also sometimes spelt as LandCruiser, is a series of four-wheel drive vehicles produced by the Japanese automobile manufacturer Toyota. It is Toyota's longest running series of models. , the sales of the Land Cruiser totalled more than 1 ...

Land Rover Land Rover is a brand of predominantly four-wheel drive, off-road capable vehicles, owned by British multinational car manufacturer Jaguar Land Rover (JLR), since 2008 a subsidiary of India's Tata Motors. JLR builds Land Rovers in Brazil ...

Mercedes-Benz G-Class The Mercedes-Benz G-Class, colloquially known as the G-Wagon or G-Wagen (as an abbreviation of Geländewagen), is a four-wheel drive luxury SUV manufactured by Magna Steyr (formerly Steyr-Daimler-Puch) in Graz, Styria, Austria, and sold by Mercede ...

, Santana PS-10,

Ford Bronco The Ford Bronco is a model line of SUV, SUVs manufactured and marketed by Ford Motor Company, Ford. The first SUV model developed by the company, five generations of the Bronco were sold from the 1966 to 1996 model years. A sixth generation of ...

Suzuki Samurai The is a series of four-wheel drive off-road mini SUVs, manufactured and marketed by Japanese automaker Suzuki since 1970. Originally belonging to the kei class, Japan's light automobile tax/legal class, the company continues to market a kei ...

International Scout The International Scout is an off-road vehicle produced by International Harvester from 1960 to 1980. A precursor of more sophisticated SUVs to come, it was created as a competitor to the Jeep, and it initially featured a fold-down windshield. ...

among many other 4x4's. These vehicles are outfitted with custom parts. Rock Crawlers can be built by a wide array of companies as well as in people's garages. Power is usually not an issue, as rock crawlers typically lower their gear ratios in order to drive more slowly over obstacles without stalling the engine. These custom parts can include: # locking differentials # taller off-road

tires A tire (North American English) or tyre (Commonwealth English) is a ring-shaped component that surrounds a wheel's rim to transfer a vehicle's load from the axle through the wheel to the ground and to provide traction on the surface over w ...

# upgraded

suspension Suspension or suspended may refer to: Science and engineering * Car suspension * Cell suspension or suspension culture, in biology * Guarded suspension, a software design pattern in concurrent programming suspending a method call and the calling ...

# four wheel steering # heavy duty

steering Steering is the control of the direction of motion or the components that enable its control. Steering is achieved through various arrangements, among them ailerons for airplanes, rudders for boats, cylic tilting of rotors for helicopters, ...

components/ solid front axle #

roll cage A roll cage is a specially engineered and constructed frame built in (or sometimes around, in which case it is known as an exo cage) the passenger compartment of a vehicle to protect its occupants from being injured or killed in an accident, pa ...

for driver protection # lowered gearing in either or all of the

transmission Transmission or transmit may refer to: Science and technology * Power transmission ** Electric power transmission ** Transmission (mechanical device), technology that allows controlled application of power *** Automatic transmission *** Manual tra ...

transfer case A transfer case is an intermediate gearbox that transfers power from the transmission of a motor vehicle to the driven axles of four-wheel-drive, all-wheel-drive, and other multi-axled on- and off-road machines. A part of the vehicle's drivetr ...

(including often employing a second transfer case to reduce gearing even more), or axle differentials #

winch A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the tension (physics), tension of a rope or wire rope (also called "cable" or "wire cable"). In its simplest form, it consists of a Bobb ...

es # barwork (

bullbar A bullbar or push bumper (also kangaroo bar, roo bar, winch bar or nudge bar in Australia, livestock stop "livestock stop" initially a term used to refer to "cowcatchers", the locomotive pilots or kangaroo device in Russia, and push bar, ram b ...

, rock sliders, brush bars, rear bar/tyre carrier and/or external roll cage bolted or welded to

frame A frame is often a structural system that supports other components of a physical construction and/or steel frame that limits the construction's extent. Frame and FRAME may also refer to: Physical objects In building construction *Framing (con ...

) # armour (protects exposed underbody components: radiator, engine oil sump,

driveline A drivetrain (also frequently spelled as drive train or sometimes drive-train) or transmission system, is the group of components that deliver mechanical power from the prime mover to the driven components. In automotive engineering, the drivet ...

) # beadlocks (locks tires to the rims for low tire pressures) # long-travel

shock absorbers A shock absorber or damper is a mechanical or hydraulic device designed to absorb and damp shock impulses. It does this by converting the kinetic energy of the shock into another form of energy (typically heat) which is then dissipated. Most sho ...

, drop shackles, spring-over conversions (to increase wheel travel), coil-over spring/shock combinations, and upgraded control arms #

portal axle A portal axle (or portal gear lift) is an off-road vehicle suspension and drive technology where the axle tube or the half-shaft is offset from – usually above – the center of the wheel hub and where driving power is transferred to each wheel ...

s Oversized, low-pressure, knobby, mud-terrain tires are used. Most vehicles have a low-geared transfer case to make the most torque in the low speeds used for rock crawling. Suspension-wise, rock crawling vehicles sometimes have after-market

lift kit A suspension lift is a modification to a vehicle to raise the ride height. It is done for the purpose of improving the off road performance of SUVs or trucks and other off-road vehicles, or for cosmetic purposes. Suspension lifts can enable st ...

s installed, raising the

chassis A chassis (, ; plural ''chassis'' from French châssis ) is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart ...

and increasing suspension flex, though the rock crawlers running the tougher trails often have fabricated suspension systems, or home-assembled leaf packs to cheaply achieve the goals, making it easier to drive over larger obstacles with less risk of damage to the vehicle. Most suspensions are made to be highly flexible, allowing for the maximum amount of tire area to contact the ground, while keeping the vehicle as low as possible. Due to the conflicting nature of the dynamics and needs of rock crawling and highway driving vehicles, it is not unusual to modify a vehicle solely for off-road recreational usage. Once a vehicle is deemed "off-road only" i.e. not driven on the street and trailered to trails or OHV parks (

Off-Highway Vehicle An off-road vehicle (ORV), also known as an off-highway vehicle (OHV), overland vehicle or adventure vehicle, is a type of transportation specifically engineered to navigate unpaved roads and surfaces. These include trails, forest roads, and o ...

), then the modification possibilities are endless. Those with the financial resources can build their own rock crawler. The biggest benefit of this approach is that the owner has complete control over what their vehicle is capable of, since each part of the vehicle can be custom designed. Acquiring sponsors can help to cover some of these costs.

Spotters

A Spotter is someone who helps a driver navigate difficult or tricky portions of a track. They most commonly assist in situations where the driver is unable to see the route, or on trails with a variety of obstacles.

References

{{Offroading Off-roading

Rock crawling basics

Vehicles

Spotters

See also

References