Custom axle specs

[kjg26]

So I've decided to replace my entire m416 axle with a custom 3500 pound axle. the wheels are we using are 15x8 with 3.75 inches of backspacing. Formula I have read is take the width of the frame and add to that two times the backspacing. and then add an additional 1.5 inches for each side. That would equal 7.5 in backspacing and 3 in "extra space". So at this point I need an axle that is frame with plus 10 and a half inches. Does this sound correct to everyone?

 

[MountainD]

I'm no expert in axles, but I am currently building my own axle for my build. I believe that you need to take into account the tire width, not just the rim width. For instance, in my case, my rims are 16x8 but my tire is 10" wide, so the tire sticks out 1" from each side of the rim. Therefore, you need to add that 1 inch (in my case) to both sides for an additional 2"----it isn't if your rim rubs, it is if your tire rubs. Now your tire may be the same width as your rim--I know mine is not-- so just check your tire width first...

 

[stomperxj]

Yes tire width is important. You want the sidewall of the tire about 1.5" away from the frame. Measure from wheel mounting surface to back side of the sidewall, add 1.5" to that. Your measurement is probably too narrow.