The scrub radius is the distance in front view between the king pin axis and the center of the contact patch of the wheel, where both would theoretically touch the road. It can be positive, negative or zero.
The kingpin axis also known as steering inclination is the line between the upper and lower pivot points of the steering knuckle.
If the kingpin axis intersection point is outboard of the center of the contact patch, it is negative; if inside the contact patch, it is positive. The term scrub radius derives from the fact that either in the positive or negative mode, the tire does not turn on its centerline (it scrubs the road in a turn) and due to the increased friction, more effort is needed to turn the wheel.
Large positive values of scrub radius, 4 inches/100 mm or so, were used in cars for many years. The advantage of this is that the tire rolls as the wheel is steered, which reduces the effort when parking, provided you're not on the brake.
The advantage of a small scrub radius is that the steering becomes less sensitive to braking inputs. More scrub radius adds to road feel by pushing the inside wheel into the ground.
An advantage of a negative scrub radius is that the geometry naturally compensates for split μ (mu) braking, or failure in one of the brake circuits. It also provides center point steering in the event of a tire deflation, which provides greater stability and steering control in this emergency.
The scrubradius is the distance in front view between the king pin axis and the center of the contact patch of the wheel, where both would theoretically...
parameters as camber angle, caster angle, toe pattern, roll center height, scrubradius, scuff (mechanical abrasion), and more. The double-wishbone suspension...
Ford which separates steering and suspension movements to provide lower scrubradius and kingpin offset than traditional MacPherson struts. Ford claims that...
MacPherson strut. That allows for better control of steering geometry and scrubradius, while allowing for a larger brake assembly. Chapman strut Coilover Double...
of linkages in the steering of a car designed to reduce or eliminate scrubradius by moving the pivot point of the king pin outboard, in order to improve...
wheel/tire combination will fit on a given vehicle. Offset also affects the scrubradius of the steering and it is advisable to stay within the limits allowed...
to wheel bearing or differential problems) Suspension geometry Large scrubradius Worn control arm bushings Unequal traction forces due to road surface...
and a deeply curved edge (of about a 3 inch to 7 inch radius) to make a deep, gouging cut. A scrub plane is generally used in diagonal strokes across the...
control arms and knuckles that reduced steering effort and improved the scrubradius. At the rear, a tri-link suspension with all new knuckles was installed...
geometry Axle track Camber angle Caster angle Ride height Roll center Scrubradius Steering ratio Toe Wheel alignment Wheelbase Some attributes or aspects...
is acknowledged as the first car in the world to feature a negative scrubradius, now recognised as a major advance in driving safety. The car's original...
cooler, and a change in suspension control arms to reduce the car's scrubradius. The engine remained the same M44/51 inline-4 as in the 1986 model. Like...
parameters as camber angle, caster angle, toe pattern, roll center height, scrubradius, scuff[clarification needed] and more. A multi-link suspension is a type...
double-wishbone layout common with the Renault 18, incorporating a negative scrubradius geometry. The suspension design would later be added to the facelifted...
arrangement, elsewhere called "zero scrubradius" is used to mitigate the effects of one-sided braking on steering. While zero scrub can reduce steering feel and...
fluid - conceptually similar to automobile Hydropneumatic suspension Scrubradius Short long arms suspension — also known as "unequal length A arm", one...
spindle, which is very useful for a suspension designer, allowing negative scrubradius whilst allowing the ball joints to move in and thus out of the way of...
Mechanical (or caster) trail Anti-dive and anti-squat Kingpin Inclination Scrubradius Spring and shock absorber motion ratios The kinematics describe how important...
the wheel/tyre pivots exactly on its vertical axis: also known as zero scrub-radius while this pivotting exactly on the vertical axis might seem obvious...
Reserve, a plant and wildlife sanctuary, is defined as a circular area of radius 9.656 km (6.000 mi) centered at 03°58′30″N 81°34′48″W / 3.97500°N 81.58000°W...
comparison, a fillet is the rounding-off of an interior corner, and a round (or radius) the rounding of an outside one. Chamfers are used in furniture such as...
ground so that they do not scrub (get dragged sideways across the ground) on tight turns, or increase the vehicle's turning radius. Axles installed behind...
is increased by the specialized olecranon process and bones such as the radius and metacarpals. Measuring generally between 60 and 75 cm (23.5 and 29.5 in)...
plant communities, including oak woodland, chaparral, and coastal sage scrub, increased. The Santa Monica Plain lies north of the city of Santa Monica...
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