Square sub frames are better cause the 90 degree angls at the corners replicate the triangle wich is the strongest geometrical
figure.
The more expensive bicycles use square tube on the main bar to add strength and take out flexibility.
Roll cages are a safety device thats why they use round tubing the smooth round wall of round tubing is much safer than square tubing square tubing has sharp 90 degree angles that would be dangerous in a roll over.
I use to be a welder and I am very good at it I have fabricated many metal structures.
Trust me square tube is much stronger and much better it is the angles of the square tube that give it the strength.
THE ONLY REASON PEOPLE SELL THE TUBE SUB FRAMES IS CAUSE THEY ARE SO EASY TO MASS PRODUCE.
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88 mustang gt convertible bored to 306 BBk equal length headers mac cold air fender kit cowl hood nitto drag radials ford racing clutch flow masters h-pipe 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires. Edelbrock 1 1/2 inch drop springs.
best 60 ft 2.14, best 1/8th 9.65, best 1/4 15.2 @89mph, Stock gears and 3000+ Altitude
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