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Trail decreases as head angle increases (becomes steeper), as fork offset increases, or as wheel diameter decreases. Motorcyclists tend to speak of trail in relation to rake angle. The larger the rake angle, the larger the trail. Note that, on a bicycle, as rake angle increases, head angle decreases. Trail can vary as the bike leans or steers.
Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds "feel" and returnability. The caster wheel on shopping carts are an extreme case – the system is undamped but stable, as the wheel oscillates around the "correct" path. The construction has relatively high trail, but no ...
In motorcycles, rake refers to the head angle instead, and offset created by the triple tree is used to diminish trail. [43] A small survey by Whitt and Wilson [28] found: touring bicycles with head angles between 72° and 73° and trail between 43 mm and 60 mm; racing bicycles with head angles between 73° and 74° and trail between 28 mm and ...
A chopper is a type of custom motorcycle which emerged in the US state of California in the late 1950s. A chopper employs modified steering angles and lengthened forks for a stretched-out appearance. They can be built from an original motorcycle which is modified ("chopped") or built from scratch.
A Triumph Sprint ST on a chassis dynamometer Suzuki Hayabusa at Bonneville Speed Week.. Motorcycle testing and measurement includes a range of more than two dozen statistics giving the specifications of the motorcycle, and the actual performance, expressed by such things as the output of the engine, and the top speed or acceleration of the motorcycle.
The Fury's design went beyond the domain of traditional Honda cruisers and onto full-out chopper turf, having austere bodywork on a faux-hardtail frame with a high-mounted steering head and long fork tubes that made the rake angle conspicuous at 38 degrees, The caster angle being 32 degrees with 6 degrees added into the steering yokes, [30] A ...
[95] [96] A wheelbase stretched to 1,655 millimetres (65.2 in), a rake angle of 34°30' [97] along with noticeable triple-tree offset [95] gave prominence to bare forks and a 21 inch front wheel (a first for Honda cruisers). [98] The chopper look was reinforced by a two-into-two exhaust system and a seat height reduced to 650 millimetres (25.6 in).
1968 BMW R60US with conventional telescopic fork Unusual "trailing bottom link" on a Honda Rune. A motorcycle fork connects a motorcycle's front wheel and axle to its frame, typically via a yoke, also known as a triple clamp, which consists of an upper yoke joined to a lower yoke via a steering stem, a shaft that runs through the steering head, creating the steering axis.