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      04-04-2015, 10:33 AM   #1
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18" vs. 19" wheels for a DD - pros and cons?

Guys,
I'm sure this has been discussed before but I searched and couldn't find it. I need better traction and grip than what I'm getting from my 225 front/255 rear Michelin PSS on OEM 18x8/8.5 OEM wheels. They were OK at first but since upgrading the turbo and the tune they don't hold on enough when pushing the car through turns at high speed. I'm going to get wider wheels and put 255 front/275 rear Bridgestone RE-11s or RE-71Rs on them. Was planning to stick with 18" wheels as I am trying to maintain a stock appearance, but selection is limited in that size - there are a lot more wheels to choose from if I go with a 19" wheel. What are the pros/cons of the two wheel sizes? The car is a DD so comfort is a concern, but I do push the car pretty hard at times and do a lot of spirited canyon runs in it.

Thanks,
Robert
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      04-04-2015, 10:48 AM   #2
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I daily my 19" Linea Corses with Michelin PSS. 235 front and 265 rear. Couldn't be happier. Also, I live in the Chicagoland area....so roads are terrible. Never had issues. Hope this helps
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      04-04-2015, 11:39 AM   #3
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Had 19" last year, I will probably go with 18" this time with bigger tires.
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      04-04-2015, 11:41 AM   #4
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I'm running 19 x 9 235/35 front , 19 x 10 265/30 rear and I love it. I will say though that the low profile tires do require that you pay more attention to railroad tracks and other such obstacles. It is also a stiffer ride than the 18's would be due to less sidewall deflection but that is exactly what you will be looking for on those canyon runs! It is a compromise between ride quality and handling but it is a small compromise. Works for me.
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      04-04-2015, 11:45 AM   #5
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Quote:
Originally Posted by datbimmer View Post
Had 19" last year, I will probably go with 18" this time with bigger tires.
Why the change from 19 to 18?
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      04-04-2015, 02:22 PM   #6
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Quote:
Originally Posted by DrRobert View Post
Guys,
I'm sure this has been discussed before but I searched and couldn't find it. I need better traction and grip than what I'm getting from my 225 front/255 rear Michelin PSS on OEM 18x8/8.5 OEM wheels. They were OK at first but since upgrading the turbo and the tune they don't hold on enough when pushing the car through turns at high speed. I'm going to get wider wheels and put 255 front/275 rear Bridgestone RE-11s or RE-71Rs on them. Was planning to stick with 18" wheels as I am trying to maintain a stock appearance, but selection is limited in that size - there are a lot more wheels to choose from if I go with a 19" wheel. What are the pros/cons of the two wheel sizes? The car is a DD so comfort is a concern, but I do push the car pretty hard at times and do a lot of spirited canyon runs in it.

Thanks,
Robert
!9" with bad road you will more than likely bend or break at least one wheel in a couple of years. I cracked/broke to Forgestars.

18" will give you a better ride.

The difference will be in ride and risk of bending a wheel.

You have an LCI car if I read correctly and a 255 may or may not fit up front without aggressive camber and fender rolling. A 255 is a tight fit on a non-LCI car but it does fit. I'm running a 245/35-19 on an ET35 9" wheel in the front and a 275/30-19 on an ET33 9.5" wheel on the rear of my car. It's a non-LCI and I don't have any rubbing.

It rides better than the RFT that were on the car when I bought it.
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      04-04-2015, 02:31 PM   #7
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I've had 19" wheels for about 5 years. They are the perfect size in my opinion. Not sure how everyone keeps bending wheels I hit bumps all the time and no issues even with my stiff suspension.
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      04-04-2015, 02:34 PM   #8
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Quote:
Originally Posted by techwhiz View Post
!9" with bad road you will more than likely bend or break at least one wheel in a couple of years. I cracked/broke to Forgestars.

18" will give you a better ride.

The difference will be in ride and risk of bending a wheel.

You have an LCI car if I read correctly and a 255 may or may not fit up front without aggressive camber and fender rolling. A 255 is a tight fit on a non-LCI car but it does fit. I'm running a 245/35-19 on an ET35 9" wheel in the front and a 275/30-19 on an ET33 9.5" wheel on the rear of my car. It's a non-LCI and I don't have any rubbing.

It rides better than the RFT that were on the car when I bought it.
I'm planning to roll the fenders and get camber plates, and my mechanic assures me 255s will fit if the wheel offset is right.
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      04-04-2015, 04:00 PM   #9
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Quote:
Originally Posted by DrRobert View Post
Why the change from 19 to 18?
2 bent wheels, harsh ride.
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      04-06-2015, 12:46 AM   #10
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Thanks guys. Gonna stick with 18s.
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      04-06-2015, 01:29 AM   #11
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Here's a good Car and Driver article on the effects of upsizing wheels/tires:

http://www.caranddriver.com/features...d-tires-tested

I think it will reinforce your decision to stick with 18's.
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      04-06-2015, 12:28 PM   #12
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Quote:
Originally Posted by driverman View Post
Here's a good Car and Driver article on the effects of upsizing wheels/tires:

http://www.caranddriver.com/features...d-tires-tested

I think it will reinforce your decision to stick with 18's.
Thanks for the read. You're right!
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      04-06-2015, 10:45 PM   #13
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I daily drive mine, 245/35/19 and 275/30/19. Stock 18's have my snow tires in them. I'm glad I went with 19" wheels.
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      04-07-2015, 04:25 AM   #14
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Unless you avoid potholes like the plague (and even if you do, there's always one on a road you don't know that will get you), 19s will bend. Either a little or a lot, depends on the wheel. It's not too serious, worst case you send them to be straightened every few years.

I recently bought my BBS from a guy who used his car only for fun, he didn't DD it, hell it was mostly for concourse. He had written in the advert that they were laser straight. Before I bought them, we went to my tire shop to have them checked, sure enough, the fronts were slightly out of whack, he was shocked. I got another $100 discount.

Moral of the story, in an area with bad roads, there is not a single perfectly straight 19" wheel on a car that gets driven. Accept that and go for the look you want, or stick with 18s.

You can offset this by using tires with a strong sidewall (like PSS), and by slightly over-inflating them, but one day, somewhere, a pothole's gonna get you.

Disclaimer, roads here are really bad, YMMV.
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      04-07-2015, 08:07 AM   #15
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I've got 19s for summer use and they're great, no issues. However, I bought 19s because they were on extreme discount and looked great at a price I couldn't pass up. Cost no object, I would still prefer 18s for several reasons:
  • You can get wider tires without going too tall in height with 18s e.g. 285/30-18 vs 285/30-19 or 255/35-18 vs 255/35-19. There is a limited selection of 30 series 19s for the narrower front tires or less than 30 series for the rear tires.
  • Lighter wheels so they handle better
  • More progressive breakaway characteristics
  • All else being equal (same tire compound, widths) better rear traction from a stop due to sidewall flex.
  • As already mentioned, less chance of bending if you hit a pothole

I've found no significant degradation in ride quality with the 19s and the snappier breakaway has been fun so far so no real issues there either.

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      04-08-2015, 10:29 AM   #16
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I would probably go with 18s for many reasons. Taller sidewall is going to protect the lip of the wheel incase you curb it. (Everyone does, its ok) I personally think taller sidewall handles better. Lastly tires are cheaper for 18s than they are for 19s.
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      04-08-2015, 10:36 AM   #17
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Quote:
Originally Posted by DrRobert View Post
Guys,
I'm sure this has been discussed before but I searched and couldn't find it. I need better traction and grip than what I'm getting from my 225 front/255 rear Michelin PSS on OEM 18x8/8.5 OEM wheels. They were OK at first but since upgrading the turbo and the tune they don't hold on enough when pushing the car through turns at high speed. I'm going to get wider wheels and put 255 front/275 rear Bridgestone RE-11s or RE-71Rs on them. Was planning to stick with 18" wheels as I am trying to maintain a stock appearance, but selection is limited in that size - there are a lot more wheels to choose from if I go with a 19" wheel. What are the pros/cons of the two wheel sizes? The car is a DD so comfort is a concern, but I do push the car pretty hard at times and do a lot of spirited canyon runs in it.

Thanks,
Robert
Just curious, with your traction issues, do you have a limited slip differential?
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      04-08-2015, 11:04 AM   #18
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I use mine as a daily driver. Love the 19s. Switching from run flat to non-run flat was a bigger change in ride than going to 19s. I highly recommend them. I also highly recommend the michelin pilot super sport tires. I'd go 19x8.5 front and 19x9.5 rear with 235 or 245 front and 275 rear. That's what I'm running. I'm planning on going bigger though up to 255 front maybe and 285, 295, or 305 rear on 19x8.5 or 19x9 front and 19x9.5 or 19.10.5 rear depending on what I can get to fit.
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      04-08-2015, 11:07 AM   #19
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I would probably go with 18s for many reasons. Taller sidewall is going to protect the lip of the wheel incase you curb it. (Everyone does, its ok) I personally think taller sidewall handles better. Lastly tires are cheaper for 18s than they are for 19s.
Sidewall protecting from dents in potholes, a bit. From curb rash, no. That depends more on how far tire sticks out from the rim so width of the wheel vs. tire width. Handling hell no. Not even close. 18s have way more slop and sidewall flex in corners. 18s are lighter though. And tires are cheaper.
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      04-08-2015, 11:14 AM   #20
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Quote:
Originally Posted by driverman View Post
Here's a good Car and Driver article on the effects of upsizing wheels/tires:

http://www.caranddriver.com/features...d-tires-tested

I think it will reinforce your decision to stick with 18's.
Good article but different car. We have less body roll and the 19s have definitely better handling. I've gone through 10 sets of tires on mine. Minimal harshness increase and substantial increase in handling. Remember VW goes up to 18s stock for a reason. BMW goes up to 19s for a reason as optional equipment and the M3 etc all have 19s for a reason. And they aren't going for looks on an M3 at the cost of performance.
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      04-08-2015, 11:39 AM   #21
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Quote:
Originally Posted by Tom Droze View Post
Just curious, with your traction issues, do you have a limited slip differential?
Yep. Quaife.


Quote:
Originally Posted by Fundguy1 View Post
I use mine as a daily driver. Love the 19s. Switching from run flat to non-run flat was a bigger change in ride than going to 19s. I highly recommend them. I also highly recommend the michelin pilot super sport tires. I'd go 19x8.5 front and 19x9.5 rear with 235 or 245 front and 275 rear. That's what I'm running. I'm planning on going bigger though up to 255 front maybe and 285, 295, or 305 rear on 19x8.5 or 19x9 front and 19x9.5 or 19.10.5 rear depending on what I can get to fit.
I'm curious, did you switch from 18" runflats directly to 19" non-runflats, or did you use 18" non-runflats before switching to 19"? If so, did you have 18" PSS before switching to 19" PSS? I'd like to hear more about how the ride changed when you went from 18 to 19", and what other variables changed at the same time.

I'm running PSSs now and don't have enough grip or traction w/ 225 fronts/255 rears on OEM 8"/8.5" wheels. I'm planning to go with Bridgestone RE-11s on the new wheels. Looking at the new HRE FF15 flow form wheels in either 18 or 19". The 18s are 9" ET35 front/10" ET40 rear and the 19s 8.5" ET30/10" ET40.
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      04-08-2015, 12:23 PM   #22
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Quote:
Originally Posted by DrRobert View Post
Yep. Quaife.




I'm curious, did you switch from 18" runflats directly to 19" non-runflats, or did you use 18" non-runflats before switching to 19"? If so, did you have 18" PSS before switching to 19" PSS? I'd like to hear more about how the ride changed when you went from 18 to 19", and what other variables changed at the same time.

I'm running PSSs now and don't have enough grip or traction w/ 225 fronts/255 rears on OEM 8"/8.5" wheels. I'm planning to go with Bridgestone RE-11s on the new wheels. Looking at the new HRE FF15 flow form wheels in either 18 or 19". The 18s are 9" ET35 front/10" ET40 rear and the 19s 8.5" ET30/10" ET40.
I went to 18 non run flats then to 19s. I was using michelin pilot sport 2 at the time. PSS weren't out yet. It firmed up in cornering with less sidewall flex and ride was firm but not harsh at all. Not many potholes here though. Handling and grip also went up. 18s with run flat were much harsher, louder, and are heavier than non run flat 19s so that was dramatic. Faster, more compliant quieter ride without runflats
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