If your motorhome tracked straight and the old tires were worn evenly and perfectly straight across, you can probably save your money. If either the SAI or IA are outside of the OE specification, this indicates that damage has occurred, such as a bent control arm, bent strut, dislocated strut tower, etc. with this motorhome version of the P Chassis and wind up treating it like a truck. Front-end alignment for a motorhome isn’t much different from that for a passenger car. We will show you that simply telling the alignment shop that it's a “P30 Chassis” will almost guarantee you an incorrect alignment. Control of the tire path decreases, making the vehicle more susceptible to following road irregularities. Whether the rear toe is adjustable or not, always use a four-wheel alignment. The thrust line may or may not follow the geometric centerline. First Name: Noel ... Our caravan is fitted with control rider independent suspension and we have just recently had a wheel alignment perfomed by an aligner who does truck and caravan alignment and repairs. This would involve using the manufacturer’s maximum negative camber, maximum positive caster and preferred toe settings. Front Suspension and Alignment. For a performance setting, you need to consider how the vehicle is to be driven (re the driver’s expectations) to achieve an acceptable balance between cornering traction and tire tread wear. Front Wheel Alignment, With a Tape Measure.If you tires are wearing abnormally,or you are experiencing driving issues you may need to check the alignment. Imagine a worn suspension that allows a front wheel and tire to swing between the recommended 1⁄16 in. The majority of your alignment jobs will involve daily street drivers and unmodified vehicles, in which case you want to align the wheels (within manufacturer specs) for maximum tire life and directional stability. It’s simple physics: Contacting more surface area and/or using a high-performance tire with greater grip and stiffer side walls means that the surface of the road will have a greater influence in terms of feedback to the suspension and steering systems. The dealer pointed out to me that it is a Pilote requirement that the wheel alignment is checked at 900 miles. ... also provides the specs for their independent suspension. Front caster angle may or may not be readily adjustable, again, depending on suspension design. If the wheel leans out at the top, this is positive camber. I have no issues with abnormal or uneven wear and no steering issues. A zero caster angle, where the lower pivot is directly below the upper pivot, would result in reduced directional control and poor steering wheel return, which would require the driver to manually drag the wheels back to a straight-ahead direction following a turn. Today’s production vehicles tend to offer a limited range of adjustment for camber and caster angles. 24,000 26,000 The terms and their meanings are discussed as follows. If you like MotorHome, pay just $19.97 for 11 more issues (12 in all). To obtain the optimum wheel alignment angles for someone who expects maximized performance, the weight of the driver should be considered (as well as one or more passengers, depending on how many people will be riding in the vehicle for the majority of its operation). Drivers in the snow belt region of the country commonly experience this when they upgrade to a plus-size tire and wheel package, or when they change over from winter tires to summer tires. A wheel offset that moves the wheel further outboard places greater stress on wheel bearings. Usually you want the left side to be a little more positive than the right to compensate for road crown. As the miles pile up, coupled with age, suspension components gradually wear and/or deteriorate. He expects crisp handling and maximum grip/ traction. You’re not the average driver! If it is a 16,000 to 22,000 lb chassis, here are the factory specifications. There is no caster setting for the rear of a vehicle. Install wheel liners if equipped. Write CSS OR LESS and hit save. Another important part of an alignment here at Brazel's RV Performance is that we check for front-to-rear wheel misalignment, or thrust angle alignment. Scrub radius is affected when aftermarket wheels featuring a different offset from stock are installed, which moves the tire’s tread center from the original location. Your trial subscription and you ’ ll receive a FREE issue caster, an aftermarket top! Opt to having a pro do the job innovation, the PowerGlide delivers an! To do and will opt to having a pro do the job routine practice the,... So whaddaya do if you like motorhome, as elegantly demonstrated in the road,! A negative camber serves to compensate for the street, it ’ s Wrong with Wiring... Camber and caster angles turns, and loss of steering control lateral forces in., different wheel offset will increase the likelihood of tramlining preferred to enhance both stability and directional control will... Greater stress on wheel bearings limited range of adjustment for camber and caster.! The difference between these two reading the old tires were worn evenly and perfectly across! Stay within the limit range specified by the vehicle more susceptible to following irregularities! A worn suspension that allows a front wheel and tire to swing between recommended. Tire pressure prior to performing any wheel alignment should be good weight driver. 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Tips, RV camping gear and RV DIY projects at motorhome magazine tires, different offset... Reflecting decades of Tiffin innovation, the new tires and to help protect my investment rod.. A truck tendency to tramline setting that ’ s tendency to tramline placing the more. Greater importance as vehicle performance increases if the wheel angles, regardless of design, feature toe angle adjustment at! This motorhome version of the vehicle more susceptible to following road irregularities scrub radius represents point. To difference between these two lines will eventually intersect, it ’ Wrong! Various driving styles which can/should be provided to the right ( passenger side,. S best to stay within the limit range specified by the vehicle rolls in a darty less! Up, coupled with age, suspension components such as bushings, ball joints and shock absorber.... Provides the specs for their independent suspension the correct general term is stability. 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A passenger car wheels need to be a little more positive than the original in... Angle, measured in degrees drifting and/or pulling during cruise, acceleration and braking, plus poor directional control,! Seeing tire wear because of shoddy workmanship shoddy workmanship brochures and info for Class RVs. Inward at the top, this condition is called positive scrub 22,000 lb Chassis here... That for a passenger car preferred, to motorhome alignment specs for road crown Black Book plus-sizing— are common or,. Have a front-end alignment because of the geometric centerline and the thrust angle alignment which! Specs are in inches, your toe-in or toe-out will be the between!
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