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In motorcycles, the steering axis angle is measured from the vertical and called the caster angle, rake angle, or just rake; [5] a 0° rake is therefore vertical. For example, Moto Guzzi [6] offers: a 2007 Breva V 1100 with a rake of 25°30′ (25.5 degrees) a 2007 Nevada Classic 750 with a rake of 27.5°
Front suspension of a race car — the caster angle is formed by the line between upper and lower ball joint An example of a chopper with a raked fork at an extreme caster angle. The caster angle [1] or castor angle [2] is the angular displacement of the steering axis from the vertical axis of a steered wheel in a car, motorcycle, bicycle ...
On bikes with front suspension, especially telescopic forks, compressing the front suspension, due to heavy braking for example, can steepen the steering axis angle and reduce trail. Trail also varies with lean angle, and steering angle, usually decreasing from a maximum when the bike is straight upright and steered straight ahead. [45] Trail ...
With a Saxon-Motodd fork, the trail and caster angle increases during braking instead of decreasing as with traditional telescopic forks. [5] BMW's boxer twins have been equipped with Telelever forks since 1994, but some newer boxers like the BMW R nineT have reverted to conventional telescopic forks for aesthetic and packaging reasons.
A positive caster angle aids in directional stability, as the wheel tends to trail, but a large angle makes steering more difficult. Curves described by the rear wheels of a conventional automobile. While the vehicle moves with a constant speed its inner and outer rear wheels do not.
tends to lead to confusion because of the use of "rake". I suggest that the word either be removed or that the sentence be changed to "On bicycles trail is a function of head angle, fork offset or rake, and wheel size." Done. 2. "Motorcyclists tend to speak of trail in relation to rake angle. The larger the rake angle the larger the trail.
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Vehicle dynamics is the study of vehicle motion, e.g., how a vehicle's forward movement changes in response to driver inputs, propulsion system outputs, ambient conditions, air/surface/water conditions, etc. Vehicle dynamics is a part of engineering primarily based on classical mechanics.