wondering if anyone knows what factory caster angle is on a 40. Also when doing a spoa do you maintain factory caster by rotating to the correct angle exactly or do you increase negative or positive caster for any benefit.
proper caster angle
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factory is +1
bigger tires like bigger caster, within reason, usually +3 to +5 or so.
to get proper caster and proper pinion angles with the SOA, cutting/turning the knuckles is a must...generally, put +4 in the knuckles and rogate the housing 10-12....total of 14-16.
bigger tires like bigger caster, within reason, usually +3 to +5 or so.
to get proper caster and proper pinion angles with the SOA, cutting/turning the knuckles is a must...generally, put +4 in the knuckles and rogate the housing 10-12....total of 14-16.
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hey woody ' I'm having a problem with wobble trying to figure it out running 38's on 2-1/4" backspacing w a kong's hysteer setup(oneton tre's) and a rancho stabilizer.Considering 4xlabs arms becase of their length (leverage) on the knuckles. Is my backspacing too much?
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i would be interested in this also . when i did my cut and turn .and did a test run i had huge wobble running 38.5 also . i went around the block and threw the steering stabalizer on and problem was gone .just curious if this has to do with the caster change .or just big tires .
Likely, somethings not quite right with the balance, caster, or toe....I always ran a stablizer tho too to mask the issues.
38's are hard to balance...period. Expecially if you use them hard.
2" backspacing with my rig, 3 different histeers, no problems....but I spent a lot of time working the toe. For some reason, big tires seem to like not only more caster (+4 or so) but also a bit more toe in....Also, double/triple check your trunion bearings and don't be afraid to re-torque those steering arms before every day on the trail. I keep a 14mm on my torque wrench at all times, and use it every morning in camp.
38's are hard to balance...period. Expecially if you use them hard.
2" backspacing with my rig, 3 different histeers, no problems....but I spent a lot of time working the toe. For some reason, big tires seem to like not only more caster (+4 or so) but also a bit more toe in....Also, double/triple check your trunion bearings and don't be afraid to re-torque those steering arms before every day on the trail. I keep a 14mm on my torque wrench at all times, and use it every morning in camp.
I second what woody said. I had big time wobble issues with 35s and tried everything under the sun to fix them. Turned out my kuckle bearing preload was around 8lbs. I re shimmed and moved preload up to around 11lbs and presto; it was fixed.
I know this is an old post but this is a good visual of caster. Even though it is for RC cars it is still the same principal.
http://www.rctek.com/handling/caster_angle_basics.html
http://www.rctek.com/handling/caster_angle_advanced.html
http://www.rctek.com/handling/caster_angle_basics.html
http://www.rctek.com/handling/caster_angle_advanced.html
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