Which tupe. Dom or ERW?

[thekawaii]

I'm about to purchase Roll Bar for my s13, it's....

Autopower Race Roll Bar*4 point mounting*welded diagonal crossbrace*Horizontal tube for shoulder harness mounting

But I don't know which tube I should get...

2" ERW tube, or 1.75" DOM

Which one's better? which one should i get? (and pass scca rules..)

The car is for Road racing, autocross, etc...

(i did search about dom, but i only found 'condom' )

[top_secret]

dom tubing means drawn over mandrel, erw means electronic resistance welding. DOM tubing is ERW tubing that is drawn over a mandrel to make it more uniform from my understanding. Since the vert weighs 3000 lbs I'd say go for the 2" tubing. I'm glad you are ordering one I actually had contacted IO port to order one but apparently no one has ever checked the "convertible" option so they don't know how well its gonna fit. You get to be the guinea pig! post pics!

as for which will meet your specifications you should probably print out the rulebooks for the sanctioning bodies you plan on competing under and making sure the bar itself is even going to conform to them. That needs to be step 1.