Alternative tire size?

[jimmy buoy]

Staggered tire size is normally 245/40r19 front and 275/35r19 rear.
Would it hurt to replace with 245/45r19 front and 275/40r19 rear??
My thoughts are a little taller sidewall would reduce the risk of pothole blowouts but still fit the car ok.
What say you?

 

[Mark_888]

That will make the diameter of the tire larger. I am not saying that is too much larger, but you may want to look at other options. Google "tire calculator" to see what other options are available with a taller aspect ratio, that will not make the diameter larger (such as slightly narrower tread, along with higher aspect ratio). Or you might want to look at Discount Tire web site and see what they say for alternate sizes.

Also, Look at the owner's manual for alternate trim levels that have the same 19" wheel size, but different tire sizes (not sure if there are any in your case).

 

[rel]

Mark_888's note on checking for alternate wheel/tire combinations for alternate trim levels is the best starting point. My curiosity is asking why you have "staggered" tire sizes? Mine are all 245/45. I do know that larger wheels with lower aspect ratios were available.

Remember though, changing the tire circumference will affect your odometer reading. I got caught speeding twice in one month and, after an amiable discussion with the police, I found I had paired up oversized tires/wheels and speedometer driven gear at the same time.

On my 2015 I checked a number of places to see if I could decrease my wheel diameter, 18", to something smaller with a taller aspect ratio. The ride's a bit rough for my wife. I've always had 70 or 75 ratios before. What I found was that 18" seems to be the smallest wheel I could use due to clearance problems near the hub. I can increase wheel size but tire aspect ratio would have to be reduced to maintain the correct overall circumference. Besides, there's the warranty issue.

 

[Mark_888]

Mark_888's note on checking for alternate wheel/tire combinations for alternate trim levels is the best starting point. My curiosity is asking why you have "staggered" tire sizes? Mine are all 245/45. I do know that larger wheels with lower aspect ratios were available.

I assume you have 245/45R18 (18" wheels). 19" staggered tire sizes come on the 5.0 V8 for some model years and trim levels.

 

[jimmy buoy]

That will make the diameter of the tire larger. I am not saying that is too much larger, but you may want to look at other options. Google "tire calculator" to see what other options are available with a taller aspect ratio, that will not make the diameter larger (such as slightly narrower tread, along with higher aspect ratio). Or you might want to look at Discount Tire web site and see what they say for alternate sizes.

Also, Look at the owner's manual for alternate trim levels that have the same 19" wheel size, but different tire sizes (not sure if there are any in your case).

Thanks for the response and yes, I've since posting looked up a tire calculator and the biggest issue in my mind is the fact that the tire size difference would be more pronounced in the rear tires vs the front. It might just be enough to cause the AWD system to thing something is wrong, having data that the front tires are running faster than the rears. I'm just going to stick with the same size and look at better tire options.

 

[Mark_888]

Thanks for the response and yes, I've since posting looked up a tire calculator and the biggest issue in my mind is the fact that the tire size difference would be more pronounced in the rear tires vs the front. It might just be enough to cause the AWD system to thing something is wrong, having data that the front tires are running faster than the rears. I'm just going to stick with the same size and look at better tire options.

One option would be to swap out tires and wheels with a V6 owner. I bet someone on this forum would do it. But you would be using different looking rims, in addition to them being 1" less diameter. Plus, I am not 100% sure there is enough brake clearance using the V6 rims on the V8 if the V8 has larger brakes up front.

 

[jimmy buoy]

Mark_888's note on checking for alternate wheel/tire combinations for alternate trim levels is the best starting point. My curiosity is asking why you have "staggered" tire sizes? Mine are all 245/45. I do know that larger wheels with lower aspect ratios were available.

Remember though, changing the tire circumference will affect your odometer reading. I got caught speeding twice in one month and, after an amiable discussion with the police, I found I had paired up oversized tires/wheels and speedometer driven gear at the same time.

On my 2015 I checked a number of places to see if I could decrease my wheel diameter, 18", to something smaller with a taller aspect ratio. The ride's a bit rough for my wife. I've always had 70 or 75 ratios before. What I found was that 18" seems to be the smallest wheel I could use due to clearance problems near the hub. I can increase wheel size but tire aspect ratio would have to be reduced to maintain the correct overall circumference. Besides, there's the warranty issue.

As stated, my Canadian model is OEM with these staggered tires and I'm sure Hyundai's engineers had their reasons in mind. Apparently staggered tires offer better handling for this and other similarly powered vehicles. Not so worried about the speedo but more concerned about the AWD being negatively affected.

 

[jimmy buoy]

One option would be to swap out tires and wheels with a V6 owner. I bet someone on this forum would do it. But you would be using different looking rims, in addition to them being 1" less diameter. Plus, I am not 100% sure there is enough brake clearance using the V6 rims on the V8 if the V8 has larger brakes up front.

The Gen 2 V8 has even larger front brakes than my previous 2012 R Spec. I know this since trying the same V8 winter wheel/tire combo on my current car that I used on my 2012 - would NOT clear the front brake caliper. (close, but no go)

The staggered tires are not the issue for me, but the aspect ratios are the possible cause of a double blow-out on my last trip on i75 down to Florida. Ugly potholes and low profile tires are apparently not a good combination. Some on the forum have suggested that having more side wall would solve the issue (different aspects). Others here just think the Continental Tires have weak sidewalls. Still others seem to feel that Hyundai's stated air pressure is too low to prevent sidewall blowouts and the tires should be run with higher pressure for this vehicle.

I just know that it really sucks to have two wrecked tires on the side of i75 somewhere in Tennessee...

 

[Mark_888]

The Gen 2 V8 has even larger front brakes than my previous 2012 R Spec. I know this since trying the same V8 winter wheel/tire combo on my current car that I used on my 2012 - would NOT clear the front brake caliper. (close, but no go)

The staggered tires are not the issue for me, but the aspect ratios are the possible cause of a double blow-out on my last trip on i75 down to Florida. Ugly potholes and low profile tires are apparently not a good combination. Some on the forum have suggested that having more side wall would solve the issue (different aspects). Others here just think the Continental Tires have weak sidewalls. Still others seem to feel that Hyundai's stated air pressure is too low to prevent sidewall blowouts and the tires should be run with higher pressure for this vehicle.

I just know that it really sucks to have two wrecked tires on the side of i75 somewhere in Tennessee...

Are you sure that just because your old after-market winter tires don't fit, that the OEM 18" wheels on the V6 also don't fit? I am assuming that your old winter rims were after-market.

I know what you mean by having a higher aspect ratio, and I agree 100%. If you want to keep the same rims, then on the front, replacing the stock 245/40r19 with something like 225/45r19. According to this tire size calculator, they are pretty close in diameter:
245/40-R19 vs 225/45-R19 Tire Comparison - Tire Size Calculator | Tacoma World

Then the rears could be 245/40r19
275/35-R19 vs 245/40-R19 Tire Comparison - Tire Size Calculator | Tacoma World

 

[jimmy buoy]

Are you sure that just because your old after-market winter tires don't fit, that the OEM 18" wheels on the V6 also don't fit? I am assuming that your old winter rims were after-market.

I know what you mean by having a higher aspect ratio, and I agree 100%. If you want to keep the same rims, then on the front, replacing the stock 245/40r19 with something like 225/45r19. According to this tire size calculator, they are pretty close in diameter:
245/40-R19 vs 225/45-R19 Tire Comparison - Tire Size Calculator | Tacoma World

Then the rears could be 245/40r19
275/35-R19 vs 245/40-R19 Tire Comparison - Tire Size Calculator | Tacoma World

The winter tires are on OEM 2009 Genesis V8 18" wheels - not aftermarket. My 2012 R-Spec V8 had OEM 19" wheels and I used these 18" wheels each winter without issue. They cleared the front brakes. No such luck on the current car. Not a huge issue since I head south for most of the nasty weather now.

Thanks for the suggestions on alternative tire size for my stock rims!

______________________________

Help support this site so it can continue supporting you!

 

[Mark_888]

The winter tires are on OEM 2009 Genesis V8 18" wheels - not aftermarket. My 2012 R-Spec V8 had OEM 19" wheels and I used these 18" wheels each winter without issue. They cleared the front brakes. No such luck on the current car. Not a huge issue since I head south for most of the nasty weather now.

Thanks for the suggestions on alternative tire size for my stock rims!

I wasn't talking about 2009 or 2012 OEM tires, but the 18" OEM tires from the V6 for the same model year as yours (or 2015+). I don't know if they will fit on a 2015+ V8, but just was wondering if they might.

 

[jimmy buoy]

I wasn't talking about 2009 or 2012 OEM tires, but the 18" OEM tires from the V6 for the same model year as yours (or 2015+). I don't know if they will fit on a 2015+ V8, but just was wondering if they might.

Good point. I'd sure like to try one but haven't seen any other gen 2's in my town. I guess its safe not to assume that Genesis 18" rims fit the same from generation to generation.

 

[Mark_888]

Good point. I'd sure like to try one but haven't seen any other gen 2's in my town. I guess its safe not to assume that Genesis 18" rims fit the same from generation to generation.

The mounting holes may fit, but I think we are talking about the brake clearance in this case. I really don't know if the 2015+ OEM 18" wheels will have enough clearance for brakes on the 2015+ V8 with 19" wheels. But I was guessing that someone on this forum with the 18" OEM rims would be willing to swap all four rims and tires if they do fit.

 

[G-539313]

I assume you have 245/45R18 (18" wheels). 19" staggered tire sizes come on the 5.0 V8 for some model years and trim levels.

I know that on many of the original stickers I looked at for 2015 Genesis they had two different size tires listed. My brother bought one and had two of one size on the front and two of the same size on the back.