My shin has bent 1/8" tubing in a 35 MPH crash. Didn't think that was possible as I was told that was acceptable roll cage material, but it sure changed my appreciation of what damage an elk can do at speed. Every thing after that was 1/4" or better. My tree bars started out 1/8" but after getting wedged between two trees they sorta looked like question marks. Once I made every thing heavy enough I needed a bigger engine. Guess that is why everything is becoming a diesel now a days. Mig welds are easier and prettier on 1/8" though. Your bumper looks very nice.