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how to figure out caster and toe in angles for unknown hubs, mounts and caster blocks
Posted: Wed Oct 05, 2022 10:10 pm
by JosephS
I haven't exactly been good about keeping track of caster blocks and just have them tossed in together and I did the same for rear blocks and mounts.
Is there a good way for me to determine what the values are?
For rear blocks, I have some that have rear blocks with r,l stamps on them and some with no stamps. Are the no stamps 0 degree blocks?
Re: how to figure out caster and toe in angles for unknown hubs, mounts and caster blocks
Posted: Wed Oct 05, 2022 10:54 pm
by juicedcoupe
You can use a protractor and 1/8 drill bit (through the hinge pin hole) to measure toe in on the mounts.
You can similarly measure any distance in angles on the carriers as well.
Once they are mounted, the difference is usually very clear.
Re: how to figure out caster and toe in angles for unknown hubs, mounts and caster blocks
Posted: Thu Oct 06, 2022 1:09 am
by JosephS
juicedcoupe wrote: ↑Wed Oct 05, 2022 10:54 pm
You can use a protractor and 1/8 drill bit (through the hinge pin hole) to measure toe in on the mounts.
You can similarly measure any distance in angles on the carriers as well.
Once they are mounted, the difference is usually very clear.
Thanks, So the toe in will be a direct angle.
What about caster?
Re: how to figure out caster and toe in angles for unknown hubs, mounts and caster blocks
Posted: Thu Oct 06, 2022 1:41 am
by juicedcoupe
Once you find out the toe, the caster gets easier. You only have so many options.
Re: how to figure out caster and toe in angles for unknown hubs, mounts and caster blocks
Posted: Thu Oct 06, 2022 10:26 am
by jwscab
when i have a bunch of caster block or arm mounts to decipher, I don't worry about measuring them. I just compare them to one another.
pretty much for rc10 there are only a few options.
find an 1/8" rod more than a couple inches long and that helps tremendously. for arm mounts, slide them on L-R and observe how they look. they will either be the same or one will have a different angle, so pair them up the best you can, and you can easily find out the ones that have a greater angle. Most have a small amount of anti squat, and either 1.5 oe 3 degrees of toe. it's pretty obvious which is which. then you have ones with zero toe. also easy to see aligned with the 1/8" rod.
same goes for caster blocks and rear hubs. if they are perpendicular to the rod, they are 0 degree hubs or 30 degree casters (perpendicular to the arm, and the nose has 30 degrees of kickup). all the others will be less, and if you have a bunch to compare, you can tell which is 30, 25, and 15 degree caster, or 1.5 or 3 degrees of toe(hub).
when you put the caster blocks or hubs on the rod, if they lay flat or parallel to each other, they are the same.