Drag tires for 20's?
11-30-2004, 07:13 PM
#61
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Originally Posted by unklej
Well, yes and no. I was making a guess where the heart of the mass would be on the wheel and tire combo. So the overall diameter would be 30". Anyway, that equation is really not valid if you want to get the actual moment of inertia for a rim and tire, it was just used to simplify the explanation.
If you want true moments of inertia, I would recommend modeling the rim in tire in a 3-D CAD software and use the mass calculator to fine the true moment of inertia.
Jeff
If you want true moments of inertia, I would recommend modeling the rim in tire in a 3-D CAD software and use the mass calculator to fine the true moment of inertia.
Jeff
You are right though probably would need some CAD design to work out the problem correctly.
11-30-2004, 07:17 PM
#62
Originally Posted by tooquick2beslo
Gotcha. I wasnt even thinking about the whole diameter of the wheel. My mistake. The only way to use that formula would probably be with the wheel off the tire, since the tire would flex under load. Not giving you a correct diameter all the time. Tires flex when in motion.
You are right though probably would need some CAD design to work out the problem correctly.
You are right though probably would need some CAD design to work out the problem correctly.
12-01-2004, 12:26 AM
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Originally Posted by BlownChevy
Had a shitty day here, and I was about to take it out on this thread 
.....so if I came of like and ******* sorry.
.....so if I came of like and ******* sorry. 
12-01-2004, 07:14 AM
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you guys are trying to compare apples to apples. My centerline 20's are LIGHTER than the factory wheels. overall diameter plays a much larger part than wheel diameter. that is why a truck with 35" or 38" tires works the brakes out harder. most people notice the difference when going to 20's or 22's because of the OVERALL DIAMETER increasing 2" in most cases. not where the weight is in relation to the hub. go put 32 or 33" tires on your 16" factory rim and see if they aren't harder to turn over and stop.
