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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.
Finally, even the profile of the front tire can influence how trail varies as the bike is leaned and steered. A measurement similar to trail, called either mechanical trail, normal trail, or true trail, [46] is the perpendicular distance from the steering axis to the centroid of the front wheel contact patch.
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.
[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).
The new Valkyrie has increased rake and trail, front and rear suspension revised for the reduced weight, 50/50 weight distribution and large tires after the fashion of sport-bikes. [7] The Valkyrie's horsepower-to-weight ratio puts it in the muscle bike class according to some reviewers. [ 8 ]
Buell 1125R; Manufacturer: Buell: Production: 2008–2009 by Buell 2009– by Erik Buell Racing: Class: Sport bike: Engine: Rotax Helicon: liquid-cooled, 72° V-twin, 1,124.9 cc (68.65 cu in), DOHC, FI, 4 valves per cylinder, finger followers, shims, dual 61 mm (2.4 in) downdraft throttle bodies, ram-air intake, dry-sump lubrication
The three-dimensional orientation of a line can be described with just a plunge and trend. The rake is a useful description of a line because often (in geology) features (lines) follow along a planar surface. In these cases the rake can be used to describe the line's orientation in three dimensions relative to that planar surface.
The Honda Fury was the first production chopper from a major motorcycle manufacturer (). [7] [9] In a break with tradition, the Fury was the first chopper to have an anti-lock braking system [10] The Fury's styling has been likened to custom-made choppers from Paul Teutul Sr. or Arlen Ness.