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<blockquote data-quote="zjohnson" data-source="post: 780873" data-attributes="member: 1311">Like tim said, hub wheel and tire play a big part in the decision process for KPI.&nbsp; The KPI for onroad could be considered for off road, but conditions are completely diff't.&nbsp; For 1, road car operate on a surface where traction is avaliable in ideal surfaces, body roll, along with wheel travel are extremely low in comparison to an off road racecars.&nbsp; Off road racecars ussually operate in low traction surfaces, and sometimes operate in the surface (sand).&nbsp; Because of wheel travel and suspenion setup, body roll is high.&nbsp; One place to look at relative KPI is on pro-am's website.&nbsp; For class 1, they offer 12-16 degrees, many is dependent upon designer preference and hub.&nbsp; As for my choices . .&nbsp; . KPI is a tool I use to achieve desired suspension geometry.&nbsp; I find other aspects more important in the world of off road racing, such as scrub radius, wheel travel, roll center, trackwidth change, etc . . . Its all a big compromise to achieve desired dynamic characteristics.&nbsp; Hope this helps</blockquote>

[QUOTE="zjohnson, post: 780873, member: 1311"] Like tim said, hub wheel and tire play a big part in the decision process for KPI. The KPI for onroad could be considered for off road, but conditions are completely diff't. For 1, road car operate on a surface where traction is avaliable in ideal surfaces, body roll, along with wheel travel are extremely low in comparison to an off road racecars. Off road racecars ussually operate in low traction surfaces, and sometimes operate in the surface (sand). Because of wheel travel and suspenion setup, body roll is high. One place to look at relative KPI is on pro-am's website. For class 1, they offer 12-16 degrees, many is dependent upon designer preference and hub. As for my choices . . . KPI is a tool I use to achieve desired suspension geometry. I find other aspects more important in the world of off road racing, such as scrub radius, wheel travel, roll center, trackwidth change, etc . . . Its all a big compromise to achieve desired dynamic characteristics. Hope this helps [/QUOTE]

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