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19X9.5R VS. 19X10R ??

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19X9.5R VS. 19X10R ??

 
Old 07-30-2009, 07:08 PM
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19X9.5R VS. 19X10R ??

Guys, I need help understanding why so many people (most, honestly, who know less than I do) are saying that 19X10R on 204's are a bad idea. From what I've seen here on the forum, most of you guys who've stepped up your wheel game, have 19X9.5R's. Why? I finally found a rim that I absolutely love which USED to be made 19X9.5 but the company's doing away with that size in favor of the more popular (fits BMW better) 19X10. I've asked a couple of times for someone to explain offsets to me with no luck. Is the offset a reason for the advice against this wheel size for our cars?
Help me understand this PLEASE!!??!!
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Old 07-30-2009, 07:33 PM
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It's a balancing game. Offsets are the measurements either positive or negative from the wheel center where the hub attaches to the car wheel mounting assembly. The widths are obviously the width of the wheels. So think of it as two pieces in your mind, the outer barrel, which is the width, and the center face that can be slid front to back which is the offset. Now, you can put a 19x10 on your ride, but you'll need to mess with the offset to pull the wheel closer inside the wheel well to make sure you don't have issues hitting your fender. However, you can't pull it too far in or you'll hit the shocks.

So lets take for example a set of wheels that's 19x9.5 with a static offset. If you were to take that same offset, but extend the barrel to 19x10, then your base width would be bigger by .25 on either side as offset is constant. If adding that extra width shifts the wheel to hit the fender instead of tucking, then you need to mess with the offset to bring the wheel inside, in which case going by our previous example you now have .5 extra width extending inwards and a new offset. Of course, there's a limit on what you can do with your offsets (besides the physical part of the wheels hitting the shocks and fenders) because the more you move out of the center plane of the wheel, the more you lose in structural integrity.

There are people who have gone 19x10s, but their optimal offset will be different than the optimal offsets for those with 19x9.5s. Talking to some wheel makers, they told me that 19x10s are pretty aggressive for our vehicle and wouldn't sit flush. Will it rub? maybe maybe not. Depends in part to what kind of rubbers you're running. Remember, just cause your wheels sit outside or right along the fender, doesn't mean you're going to hit it on every bump due to the negative cambering that happens, but you have to have enough clearance to take advantage of that cambering for it to not rub.

Last edited by Azn_C300; 07-30-2009 at 09:17 PM.
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Old 07-30-2009, 08:37 PM
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FINALLY!!!!!
AZN, you are THE MAN! I get it now. Maybe (maybe not) something as simple as stretching my rubber may solve the issue. Before your explanation, I was under the impression that the rim was literally too wide to fit our wheel wells without something like spacers, which I definitely don't want to do. Thank you so very much AZN. I will put this newfound knowledge to very good use. BTW, your ride and mod tastes are impeccable.

If anyone here is running 19X10's out back, could you please post pics or tell me what offset you used, rubbing issues (Chicago potholes ya know), any negatives (except price) associated with this setup at all.
Again, thanks AZN and everyone else in advance!
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Old 07-30-2009, 09:20 PM
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Another option you have is rolling your fenders to give you a bit more breathing room.
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Old 07-30-2009, 09:37 PM
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[QUOTE=Azn_C300;3647617]Another option you have is rolling your fenders to give you a bit more breathing room.[/Q

Was giving this option some thought as well. Think this mod will affect resale/ trade-in value or go unnoticed?
What type of shop is best suited to perform a mod as delicate as this?
Thanks again AZN!
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Old 07-31-2009, 12:05 AM
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I run 20X10 with plenty of space. No fender rubbing. Just go with custom made 3 piece wheels, chose a tire that does not have a flat sidewall ( Falken makes a good tire. Stay away from Nitto), and you won't have any issues.


Last edited by c3nthusiast; 07-31-2009 at 12:11 AM.
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