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How to measure the wheelbase of your vehicle
How to measure the wheelbase of your vehicle
Published: 2012/06/11
Channel: Airtex/ASC Performance Pumps
Why is wheelbase important on skateboards?
Why is wheelbase important on skateboards?
Published: 2011/01/21
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Wheelbase Meaning
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Wheelbase(व्हील बेस ) :Automobile training in Hindi: Twizards Automobile
Published: 2017/07/05
Channel: Twizards Automobiles
Range Rover Autobiography Long Wheelbase - Magnificent
Range Rover Autobiography Long Wheelbase - Magnificent
Published: 2014/02/04
Channel: TheSmokingTire
2017 Bentley Mulsanne Extended Wheelbase (EWB) Limousine FIRST DRIVE REVIEW (3 of 4)
2017 Bentley Mulsanne Extended Wheelbase (EWB) Limousine FIRST DRIVE REVIEW (3 of 4)
Published: 2016/06/25
Channel: MotoManTV
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Top Gear: Long Wheel Base Cars
Published: 2016/04/01
Channel: Bridger987
HaylettRV - How does Wheel Base affect Towing? with Josh the RV Nerd
HaylettRV - How does Wheel Base affect Towing? with Josh the RV Nerd
Published: 2017/06/05
Channel: Haylett RV
Long Wheelbase Luxury Sedans Comparison Test
Long Wheelbase Luxury Sedans Comparison Test
Published: 2011/08/18
Channel: RoadandTrack
Fanatec CSL Elite Wheel Base Review + Comparison to Thrustmaster TX and Fanatec CSW V2
Fanatec CSL Elite Wheel Base Review + Comparison to Thrustmaster TX and Fanatec CSW V2
Published: 2016/10/12
Channel: Inside Sim Racing
Fanatec ClubSport Wheel Base V2.5 Review
Fanatec ClubSport Wheel Base V2.5 Review
Published: 2017/07/11
Channel: Inside Sim Racing
New Rolls-Royce Phantom Extended Wheelbase
New Rolls-Royce Phantom Extended Wheelbase
Published: 2017/10/04
Channel: autowrap
2017 Bentley Mulsanne Extended Wheelbase (EWB) Review
2017 Bentley Mulsanne Extended Wheelbase (EWB) Review
Published: 2017/03/07
Channel: Ben Wayne
Jeep YJ Build: 102" wheel base.
Jeep YJ Build: 102" wheel base.
Published: 2017/03/19
Channel: ashland82391
Fanatec CSL Elite Wheelbase CSL Elite Load Cell Pedals and CSL P1 Review
Fanatec CSL Elite Wheelbase CSL Elite Load Cell Pedals and CSL P1 Review
Published: 2016/11/17
Channel: SimRacingGirl
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INSANE HILLBORNE INJECTED DODGE HEMI BURNOUT AFX ALTERED WHEEL BASE DODGE
Published: 2014/09/25
Channel: freakineagle
Handyman Corner Variable Wheelbase
Handyman Corner Variable Wheelbase
Published: 2017/02/03
Channel: RedGreenTV
Fanatec Clubsport Wheelbase V2.5 full review by The Simpit
Fanatec Clubsport Wheelbase V2.5 full review by The Simpit
Published: 2017/04/01
Channel: The Simpit
2015 Rolls-Royce Serenity Phantom Extended Wheelbase - Walkaround - 2015 Geneva Motor Show
2015 Rolls-Royce Serenity Phantom Extended Wheelbase - Walkaround - 2015 Geneva Motor Show
Published: 2015/03/11
Channel: AutoMotoTube
[4k] For Sale Range Rover SV Autobiography V8 Supercharged Long Wheelbase at Premium Cars Stockholm
[4k] For Sale Range Rover SV Autobiography V8 Supercharged Long Wheelbase at Premium Cars Stockholm
Published: 2016/12/07
Channel: GTBOARD.com
2014 Range Rover Autobiography SC Long Wheelbase  - Review, Start up, Exhaust Sound, and Test Drive
2014 Range Rover Autobiography SC Long Wheelbase - Review, Start up, Exhaust Sound, and Test Drive
Published: 2014/10/22
Channel: Motorcar File
Дальнобой. США. Длинная фура. Peterbilt 350 inch wheelbase . Kenworth W9 315 inch wheelbase
Дальнобой. США. Длинная фура. Peterbilt 350 inch wheelbase . Kenworth W9 315 inch wheelbase
Published: 2017/09/15
Channel: Freeride
Fanatec V2.5 Wheel Base Review!
Fanatec V2.5 Wheel Base Review!
Published: 2017/08/02
Channel: RTA MOTORSPORTS
Fanatec ClubSport Wheel Base V2 Review on PC and PS4
Fanatec ClubSport Wheel Base V2 Review on PC and PS4
Published: 2015/11/28
Channel: Inside Sim Racing
Range Rover Autobiography Long Wheel Base Review
Range Rover Autobiography Long Wheel Base Review
Published: 2014/08/30
Channel: CarAdvice.com
Mercedes-Benz E-Class (Long Wheelbase V213) - First Drive Review
Mercedes-Benz E-Class (Long Wheelbase V213) - First Drive Review
Published: 2017/02/28
Channel: OVERDRIVE
Fanatec Clubsport Wheelbase V2 Review
Fanatec Clubsport Wheelbase V2 Review
Published: 2014/09/03
Channel: The Simpit
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FANATEC CSL Elite Wheel Base vs. FANATEC Clubsport Wheel Base V2 [deutsch|german|english CC]
Published: 2016/12/27
Channel: RON
Fanatec CSL Elite Wheel Base and Pedals First Look
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Published: 2016/08/28
Channel: Inside Sim Racing
2016 BMW 7 Series Long Wheelbase 750Li xDrive G12 - Footage
2016 BMW 7 Series Long Wheelbase 750Li xDrive G12 - Footage
Published: 2015/09/06
Channel: YOUCAR
1978 Peterbilt 359, 3408 Cat, 325" Wheelbase
1978 Peterbilt 359, 3408 Cat, 325" Wheelbase
Published: 2014/09/20
Channel: Smart-Trucking.com
World premiere of the new long-wheelbase E-Class at Auto China 2016 - Mercedes-Benz original
World premiere of the new long-wheelbase E-Class at Auto China 2016 - Mercedes-Benz original
Published: 2016/04/27
Channel: Mercedes-Benz
Adam Drake from Mugen Seiki Racing explains wheelbase adjustment.
Adam Drake from Mugen Seiki Racing explains wheelbase adjustment.
Published: 2015/06/30
Channel: Adam Drake
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Published: 2016/05/23
Channel: Canyon Bicycles
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2017 Bentley Mulsanne Extended Wheelbase Rear Seats | Autoblog Short Cuts
Published: 2016/02/24
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Altered Wheelbase Nova Burnout
Published: 2010/02/11
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Spirit Short Wheel Base Recumbent
Published: 2011/08/23
Channel: Atomic Zombie Extreme Machines
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Altered Wheelbase Drag Cars...Tough As Nails!!
Published: 2017/03/19
Channel: Count Hackula
2018 Lincoln Navigator Long-Wheelbase SUV
2018 Lincoln Navigator Long-Wheelbase SUV
Published: 2017/06/23
Channel: Auto Mania
Peterbilt 325 wheel base yard switching lol
Peterbilt 325 wheel base yard switching lol
Published: 2016/10/09
Channel: SPYDER MIKE
Fifer Touring M (Citroen Relay medium-wheelbase campervan)  by East Neuk Campervans
Fifer Touring M (Citroen Relay medium-wheelbase campervan) by East Neuk Campervans
Published: 2017/06/10
Channel: Brom
2018 Audi A8 L (Long Wheel Base) - Interior
2018 Audi A8 L (Long Wheel Base) - Interior
Published: 2017/07/11
Channel: The Wheel Network
2009 Rolls-Royce Phantom Extended Wheelbase
2009 Rolls-Royce Phantom Extended Wheelbase
Published: 2009/06/16
Channel: Cars.com
The Audi A8 long wheel base review
The Audi A8 long wheel base review
Published: 2012/04/18
Channel: Bob Flavin
Fanatec CSL Elite Wheel Base and CSL P1 Rim Review
Fanatec CSL Elite Wheel Base and CSL P1 Rim Review
Published: 2016/09/29
Channel: Sim Racing Paddock
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Review - Fanatec CSL Elite Wheel Base + Loadcell Brake Kit [GER] [HD] - Fakten und Eindrücke
Published: 2016/12/11
Channel: Abgefahren!
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Published: 2017/03/18
Channel: RCSparks Studio
2018 Volkswagen Tiguan Long-Wheelbase - Interior and Design
2018 Volkswagen Tiguan Long-Wheelbase - Interior and Design
Published: 2017/01/10
Channel: Car TV
Product Review Landychtz "Dinghy" Deck - Wheelbase Magazine
Product Review Landychtz "Dinghy" Deck - Wheelbase Magazine
Published: 2014/12/12
Channel: wheelbasemag
2017 Bentley Mulsanne Speed & Bentley Mulsanne Extended Wheelbase - TECH REVIEW (1 of 4)
2017 Bentley Mulsanne Speed & Bentley Mulsanne Extended Wheelbase - TECH REVIEW (1 of 4)
Published: 2016/06/21
Channel: MotoManTV
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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In both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels. For road vehicles with more than two axles (e.g. some trucks), the wheelbase is defined as the distance between the steering (front) axle and the centerpoint of the driving axle group. In the case of a tri-axle truck, the wheelbase would be the distance between the steering axle and a point midway between the two rear axles.

Wheelbase (measured between rotational centers of wheels)

Vehicles[edit]

The wheelbase of a vehicle equals the distance between its front and rear wheels. At equilibrium, the total torque of the forces acting on a vehicle is zero. Therefore, the wheelbase is related to the force on each pair of tires by the following formula:

where is the force on the front tires, is the force on the rear tires, is the wheelbase, is the distance from the center of mass (CM) to the rear wheels, is the distance from the center of gravity to the front wheels ( + = ), is the mass of the vehicle, and is the gravity constant. So, for example, when a truck is loaded, its center of gravity shifts rearward and the force on the rear tire increases. The vehicle will ride lower. The amount the vehicle sinks will depend on counter acting forces like the size of the tires, tire pressure, and the stiffness of the suspension. If the vehicle is accelerating or decelerating, extra torque is placed on the rear or front tire respectively. The equation relating the wheelbase, height above the ground of the CM, and the force on each pair of tires becomes:

where is the force on the front tires, is the force on the rear tires, is the distance from the CM to the rear wheels, is the distance from the CM to the front wheels, is the wheelbase, is the mass of the vehicle, is the acceleration of gravity (approx. 9.8 m/s2), is the height of the CM above the ground, is the acceleration (or deceleration if the value is negative). So, as is common experience, when the vehicle accelerates, the rear usually sinks and the front rises depending on the suspension. Likewise, when braking the front noses down and the rear rises.:[1]

Because of the effect the wheelbase has on the weight distribution of the vehicle, wheelbase dimensions are crucial to the balance and steering. For example, a car with a much greater weight load on the rear tends to understeer due to the lack of the load (force) on the front tires and therefore the grip (friction) from them. This is why it is crucial, when towing a single-axle caravan, to distribute the caravan's weight so that down-thrust on the tow-hook is about 100 pounds force (400 N). Likewise, a car may oversteer or even "spin out" if there is too much force on the front tires and not enough on the rear tires. Also, when turning there is lateral torque placed upon the tires which imparts a turning force that depends upon the length of the tire distances from the CM. Thus, in a car with a short wheelbase, the short lever arm from the CM to the rear wheel will result in a greater lateral force on the rear tire which means greater acceleration and less time for the driver to adjust and prevent a spin out or worse.

Wheelbases provide the basis for one of the most common vehicle size class systems.

Varying wheelbases within nameplate[edit]

Some luxury vehicles are offered with long-wheelbase variants to increase the spaciousness and therefore the luxury of the vehicle. This practice can often be found on full-size cars like the Mercedes-Benz S-Class, but ultra-luxury vehicles such as the Rolls-Royce Phantom and even large family cars like the Rover 75 came with 'limousine' versions. Prime Minister of the United Kingdom Tony Blair was given a long-wheelbase version of the Rover 75 for official use.[2]

In contrast, coupé varieties of some vehicles such as the Honda Accord are usually built on shorter wheelbases than the sedans they are derived from.

Bikes[edit]

The wheelbase on many commercially available bicycles and motorcycles is so short, relative to the height of their centers of mass, that they are able to perform stoppies and wheelies.

Skateboards[edit]

In skateboarding the word 'wheelbase' is used for the distance between the two inner pairs of mounting holes on the deck. This is different from the distance between the rotational centers of the two wheel pairs. A reason for this alternative use is that decks are sold with prefabricated holes, but usually without trucks and wheels. It is therefore easier to use the prefabricated holes for measuring and describing this characteristic of the deck.

A common misconception is that the choice of wheelbase is influenced by the height of the skateboarder. However, the length of the deck would then be a better candidate, because the wheelbase affects characteristics useful in different speeds or terrains regardless of the height of the skateboarder. For example, a deck with a long wheelbase, say 22 inches (55.9 cm), will respond slowly to turns, which is often desirable in high speeds. A deck with a short wheelbase, say 14 inches (35.6 cm), will respond quickly to turns, which is often desirable when skating backyard pools or other terrains requiring quick or intense turns.

Rail[edit]

In rail vehicles, the wheelbase follows a similar concept. However, since the wheels may be of different sizes (for example, on a steam locomotive), the measurement is taken between the points where the wheels contact the rail, and not between the centers of the wheels.

On vehicles where the wheelsets (axles) are mounted inside the vehicle frame (mostly in steam locomotives), the wheelbase is the distance between the front-most and rear-most wheelsets.

On vehicles where the wheelsets are mounted on bogies (amer.: trucks), three wheelbase measurements can be distinguished:

  • the distance between the pivot points of the front-most and rear-most bogie;
  • the distance between the front-most and rear-most wheelsets of the vehicle;
  • the distance between the front-most and rear-most wheelsets of each bogie.

The wheelbase affects the rail vehicle's capability to negotiate curves. Short-wheelbased vehicles can negotiate sharper curves. On some larger wheelbase locomotives, inner wheels may lack flanges in order to pass curves.

The wheelbase also affects the load the vehicle poses to the track, track infrastructure and bridges. All other conditions being equal, a shorter wheelbase vehicle represents a more concentrated load to the track than a longer wheelbase vehicle. As railway lines are designed to take a pre-determined maximum load per unit of length (tonnes per meter, or pounds per foot), the rail vehicles' wheelbase is designed according to their intended gross weight. The higher the gross weight, the longer the wheelbase must be.

See also[edit]

References[edit]

  1. ^ Ruina, Andy; Rudra Pratap (2002). Introduction to Statics and Dynamics (PDF). Oxford University Press. p. 350. Retrieved 2007-03-23. 
  2. ^ Biggs, Henry (October 27, 2004). "Rover 75". autoexpress.co.uk. Auto Express. Retrieved May 8, 2017. 

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