Quote:
Originally Posted by tobroketobuildarealcar
I run the same brand tires with the same overall diameter meaning the tire rotates the same ammount of times per mile and no the wheels are not bent weight makes a huge difference bottom line if you don't beleive it go talk to any serious race team and see ic you can convince them to run heavier wheels
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So I'm guessing here that the difference is in the rim size? Like 16 to 17? If so you will notice a difference since the sidewalls will be smaller causing the tire to grip the road more rather than flex while cornering.
And a serious race team needs that extra .05 of a second that running 5lb lighter rim will net you. Now if you're taking 25lbs off then yes you will notice a difference. The op is asking about 21lb rims that he won't really notice a difference with.
Like I said previously the easiest way to notice a difference while working around rims is tire size. Use a 215/40 compared to a 215/60. The difference is extremely noticeable.