wall thickness for chromoly subframe?

[maxamillion]

im going to make some subframe braces for my yfz. i was planning on ordering 3/4 inch OD chromoly tubing from www.onlinemetals.com what wall thickness is typically used on aftermarket subframes? also if u guys know of a better place to order tubing for this small project i am open for suggestions, thanx -max

[Logan #34's Dad]

I don't know what you'd want for a subframe but I can tell you what is used by one of the industry leaders for a-arms.
Upper a-arms: 4130 tubing .120 wall.
I'd say that thickness would be overkill but may give you an idea...

[hontrx265r]

.120 is way too heavy. Max you would be fine making braces out of .065. For someone my size if I was building an entire sub I would probably use .095.

[chopp124]

yeah .095 wall is right in middle, gibson used .120 wall for everything and even know its 10 lbs heavyer i have never cracked anything in 12 years now. walsh and laeger and lonestart use the .060 wall and seem to not last more than couple seasons unless u got the desert chassis wich was more .120 wall. walsh only used chromoly on bottom tubes, i kinda lost some respect for them when i saw that. roll design were heavy as well. but they held up good. but its not going to hurt to go heavy i mean a sub frame your talkin maybe 1/4 pound heavier

[chopp124]

if u need any mounts i have a bunch from the gibson chassis but all 250r

[maxamillion]

okay sounds good i found they offer this size between .065 & .095. i think ill go with this. it runs about $6.50 a ft or i can get 6 ft for $28. much cheaper than an aftermarket subframe lol.

0.75" OD x 0.083" WALL x 0.584" ID 4130 NORMALIZED TUBE

[Logan #34's Dad]

I'd recommend you go with the same but use square tube. Much easier to make cuts and mount things too.