i did a search and found this fwiw
http://mobile.pirate4x4.com/forum/gener ... st101900741.5 x .095 dom and hrew are both the same weight but dom is almost twice as strong and right at $1 more per foot
also did a little math, while ive never built a buggy frame im guessing there is around 100ft of 1.5 tubeing in a complete frame which calculates to 17 lbs difference between using .095 vs .083,(.095 being heavier of course) and .120 wall would be 34.3 lbs more than the .095 and would be 51.3 lbs more than .083
Chrome-Moly Tensile Stength = 90,000 psi
Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Cost ($/ft) Weight (lb/ft)
1.75 0.120 1.51 0.61 55,303 $6.63 2.089 lb
1.75 0.095 1.56 0.49 44,453 $6.59 1.679 lb
1.75 0.083 1.58 0.43 39,119 $8.17 1.478 lb
1.50 0.120 1.26 0.52 46,821 $6.01 1.769 lb1.50 0.095 1.31 0.42 37,738 $5.74 1.426 lb1.50 0.083 1.33 0.37 33,253 $5.51 1.256 lb1.25 0.120 1.01 0.43 38,339 $5.65 1.448 lb1.25 0.095 1.06 0.34 31,023 $5.44 1.172 lb1.25 0.083 1.08 0.30 27,386 $5.50 1.034 lb1.00 0.120 0.76 0.33 29,857 $5.54 1.128 lb
1.00 0.095 0.81 0.27 24,308 $5.42 .9182 lb
1.00 0.083 0.83 0.24 21,519 $5.39 .8129 lb
1.00 0.065 0.87 0.19 17,183 $4.98 .6491 lb
DOM Tensile Stength = 70,000 psi Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Cost ($/ft) Weight (lb/ft)
1.75 0.125 1.50 0.64 44,668 $5.54 2.169 lb
1.75 0.095 1.56 0.49 34,575 $5.36 1.596 lb
1.75 0.083 1.58 0.43 30,426 $5.23 1.478 lb
1.50 0.120 1.26 0.52 36,416 $5.18 1.769 lb1.50 0.095 1.31 0.42 29,352 $5.92 1.426 lb 1.50 0.083 1.33 0.37 25,863 $5.61 1.256 lb1.25 0.120 1.01 0.43 29,819 $5.28 1.448 lb1.25 0.095 1.06 0.34 24,129 $5.00 1.172 lb1.25 0.083 1.08 0.30 21,300 $5.57 1.034 lb1.00 0.120 0.76 0.33 23,222 $5.00 1.128 lb
1.00 0.095 0.81 0.27 18,906 $5.00 .9182 lb
1.00 0.083 0.83 0.24 16,737 $5.00 .8129 lb
1.00 0.065 0.87 0.19 13,365 $5.00 .6490 lb
HREW Tensile Stength = 40,000 psi Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Cost ($/ft) Weight (lb/ft)
1.75 0.120 1.51 0.61 24,579 $5.20 2.089 lb
1.75 0.095 1.56 0.49 19,757 $5.06 1.596 lb
1.75 0.083 1.58 0.43 17,386 $5.11 1.478 lb
1.50 0.120 1.26 0.52 20,809 $5.16 1.769 lb1.50 0.095 1.31 0.42 16,772 $5.00 1.426 lb1.50 0.083 1.33 0.37 14,779 $5.00 1.256 lb1.25 0.120 1.01 0.43 17,039 $5.04 1.448 lb1.25 0.095 1.06 0.34 13,788 $5.00 1.172 lb1.25 0.083 1.08 0.30 12,172 $5.00 1.034 lb1.00 0.120 0.76 0.33 13,270 $5.00 1.128 lb
1.00 0.095 0.81 0.27 10,804 $5.00 .9182 lb
1.00 0.083 0.83 0.24 9,564 $5.00 .8129 lb
1.00 0.065 0.87 0.19 7,637 $5.00 .6490 lb