I posted this in the Visual Mod. section also, I thought I should post here also to the get the gearheads involved.

I have never seen a vehicle that can benefit from 22" wheels more that the GC SRT8. I am aware of the fact that with wheels the further you move the weight from the center, the more power it takes to rotate the them. But just how much. Has anyone ever done any dyno testing of how much horsepower is actually lost by upsizing wheels. We may not admit it, even to ourselves, but it is not all about performance, we want our rides to look good too. You do not see anyone running 17" wheels on their GC for quicker times.

Does anyone that has upgraded to 22's on their ride (not necessarily a GCSRT8 since as far as I know only one GCSRT8 owner has upgraded to 22's) and also has access to a dyno and their original wheels have the time and energy to dyno test and find out the truth. I believe a lot of us would like to know if we are talking 12 to 15 horses or 30 or more.

What about it, anyone game?
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I have never seen a vehicle that can benefit from 22" wheels more that the GC SRT8. I couldn't disagree more. In fact the GC SRT8's whole character is maximizing performance & removing an optimised component & replacing it with a lower performing one is counter-productive in every way.We may not admit it, even to ourselves, but it is not all about performance, we want our rides to look good too. You do not see anyone running 17" wheels on their GC for quicker times. It's doubtful 17's will clear the Brembos, but it wouldn't surprise me at all to see someone going to 18's & Drag Radials at some point, although AWD makes this mostly unnecessary.
Does anyone that has upgraded to 22's on their ride (not necessarily a GCSRT8 since as far as I know only one GCSRT8 owner has upgraded to 22's) and also has access to a dyno and their original wheels have the time and energy to dyno test and find out the truth. I believe a lot of us would like to know if we are talking 12 to 15 horses or 30 or more.
What about it, anyone game?
__________________The higher weight of the rotating mass won't affect HP on a dyno to any degree, but it will make a difference as to how the HP translates to acceleration. I see 4 drawbacks to using larger diameter wheels on the GC SRT8.
(1) Slower Acceleration
(2) No compatible Run Flats available.
(3) Compromised ride quality
And my personal opinion:
(4) They will look far worse than the factory set-up

PS: The good news is that even if you go in this direction you'll still have an SUV that will dust 99% of the vehicles on the road, just don't line up against another GC SRT8. For the record I'm all in favor of you doing whatever you want & like with your GC SRT8 & will be interested in seeing the results. I was simply giving my opinion as you requested. Diversity is indeed the American way, so go for it & good luck.

PS: The good news is that even if you go in this direction you'll still have an SUV that will dust 99% of the vehicles on the road, just don't line up against another GC SRT8. For the record I'm all in favor of you doing whatever you want & like with your GC SRT8 & will be interested in seeing the results. I was simply giving my opinion as you requested. Diversity is indeed the American way, so go for it & good luck.

Alright, someone that understands what I think this forum should be all about. We can totally disagree without starting a pissing match and still encourage each other to do our own thing.
I am here to learn and see what other people do to their rides, who knows, maybe their preferences may become my own. I would hate to think this old dog can't learn any new tricks.

Thanks for the response.

Alright, someone that understands what I think this forum should be all about. We can totally disagree without starting a pissing match and still encourage each other to do our own thing.
I am here to learn and see what other people do to their rides, who knows, maybe their preferences may become my own. I would hate to think this old dog can't learn any new tricks.

Thanks for the response.Hey no problem. About the 22's, I had a real problem with the 18's on my Lightning when I bought it in 2000. I thought they were ridiculously large. Then I bought an '03 FX45 with 20's & felt they were cartoonish they were so large, & now Cadillac is offering factory 22's on the '07 Escalade. I would prefer factory styled 18's on my GC SRT8 but I'm coming around, bear with me, I'm just another "Old Dog".

Hey no problem. About the 22's, I had a real problem with the 18's on my Lightning when I bought it in 2000. I thought they were ridiculously large. Then I bought an '03 FX45 with 20's & felt they were cartoonish they were so large, & now Cadillac is offering factory 22's on the '07 Escalade. I would prefer factory styled 18's on my GC SRT8 but I'm coming around, bear with me, I'm just another "Old Dog".


Hey man I hear you. I called 20's wagon wheels when they first came out.

Now I put 22's on my wife’s Range Rover and when I picked it up I wished they were 24's. There is a limit to overall OD and rim diameter and 20's are probably the best trade off of all factors. But for me if the cost (ride quality, performance, etc.) is not too great I am willing to go with the impractical to appease my personal aesthetics.
At 48 years old I may look goofy in a Range Rover on 22's but it is what I like, and I am finally in a financial position to indulge myself some.



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At 48 years old I may look goofy in a Range Rover on 22's but it is what I like, and I am finally in a financial position to indulge myself some.
Don't be implying 48 is old you Young Whipper-Snapper...That would make me older than old...

Don't be implying 48 is old you Young Whipper-Snapper...That would make me older than old...


If I deciphered your member ID correctly, 2 years at our age is NOTHING. Practically seconds.

With age comes the wisdom to have an strong opinion and yet let others have theirs.

How about a poll of ages on this forum. I for one am curious as to how many of us old farts bought GC SRT8's.


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If I deciphered your member ID correctly, 2 years at our age is NOTHING. Practically seconds.

With age comes the wisdom to have an strong opinion and yet let others have theirs.

How about a poll of ages on this forum. I for one am curious as to how many of us old farts bought GC SRT8's.


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Born in 1956, and after two BMW's, I'm very happy to own this SRT8 Jeep.

Born in 1956, and after two BMW's, I'm very happy to own this SRT8 Jeep.


All right another "old fart" joins the ranks. That is a respectful old fart, from one to another.

By the way, I have always been into cars, from a Boss 302 to the enormous Hummer H2.

This GC SRT8 is the most fun vehicle I have owned. Beats out all my current rides also.



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While this seems to be a bit off the subject of this thread I will throw in my 60 year old wisdom. You're never too old to enjoy power, speed and beauty. Of course I am on my 18th mid-life crisis.

i agree with the whole rotating mass thing - but im sure that there are 22's that are forged (iForged, HRE, forgeline, etc) that with tires would weigh less than the stock combo, and would not result in any performance loss.

i agree with the whole rotating mass thing - but im sure that there are 22's that are forged (iForged, HRE, forgeline, etc) that with tires would weigh less than the stock combo, and would not result in any performance loss.


That's what I was hoping that basically with quality wheels the loss would be minimal.

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