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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="hadronuk" data-source="post: 75782" data-attributes="member: 1866"><p>Why do you say "the lower link needs to be about level or slightly pointed upward with the rider sitting on the bike."? I agree that with the standard geometry there is clearly a watershed point which if you are on the wrong side of when braking can result in the forks jacking up. But I am not at all convinced the angle of the lower link is the sole determinant of this watershed point. Load and spring rate are clearly factors and there are large forces in the top link as well. I thought the new geometry has already been proved to eliminate or at least drastically reduce the tendency to jack up under braking? In which case the lower link position may be less critical and the useable suspension travel could be increased to improve comfort and road holding. If your view is based on experience of new geometry forks, then I happily bow to that experience! Even the PhDs with their super computers at Imperial and Cranfield were only partially successful in theoretically modelling bike dynamic behaviour, so what do I know.</p></blockquote><p></p>
[QUOTE="hadronuk, post: 75782, member: 1866"] Why do you say "the lower link needs to be about level or slightly pointed upward with the rider sitting on the bike."? I agree that with the standard geometry there is clearly a watershed point which if you are on the wrong side of when braking can result in the forks jacking up. But I am not at all convinced the angle of the lower link is the sole determinant of this watershed point. Load and spring rate are clearly factors and there are large forces in the top link as well. I thought the new geometry has already been proved to eliminate or at least drastically reduce the tendency to jack up under braking? In which case the lower link position may be less critical and the useable suspension travel could be increased to improve comfort and road holding. If your view is based on experience of new geometry forks, then I happily bow to that experience! Even the PhDs with their super computers at Imperial and Cranfield were only partially successful in theoretically modelling bike dynamic behaviour, so what do I know. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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