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225/45/r18 vs 225/40/r18

57K views 66 replies 18 participants last post by  justink  
#1 ·
Hi all! I am still shopping for the perfect wheels + tires package.

I saw one I like at wheelfire.com and the recommended size is 225/40r18. When I called their sales line the person was really insisting I buy that size because it will not rub but I already know people in this forum like kencwood having 45s. I just like that size better because it leaves less of a gap and is more comfortable.

Wheelfire said if I buy the 45 series, they will not be able to offer their 100% guaranty.

Any thoughts on this? Pictures would help!

Thank you!
 
#5 ·
I suggest you stay with 225/40/18 which is the proper overall height to keep your speedo bang on. By going with a 45 series tire your speedo will be off by 3.5%.
I agree with you the 225/40/18 is bang on at 25.1" diameter, which is the same supposedly as the stock 205/55/16. Though if you calculate the 205/55/16 diameter it is 24.9"

The Limited comes with 215/45/17 and calculates to
17*25.4=431.8
215*.45*2=193.5
Total 625.3/25.4=24.62" diameter

The tire rack shows it as 24.8" and the 205/55/16 as 25.1 though they originally had it as 24.9".

http://www.tirerack.com/tires/tires...leSearch=true&fromCompare1=yes&autoMake=Hyundai&autoYear=2013&autoModel=Elantra Coupe&autoModClar=SE

http://www.tirerack.com/tires/tires...leSearch=true&fromCompare1=yes&autoMake=Hyundai&autoYear=2013&autoModel=Elantra Sedan&autoModClar=GLS

No matter the small differences in diameter are close enough and I doubt the ECU is adjusted per model for such small differences. I could be wrong about that but you still have different make tires that may vary a bit in diameter too.
 
#12 ·
#18 ·
How much are you guys spending on the 18's package? I'd love to trade up my limited elantra rims, but that would probably be a hassle, selling etc.

I like the 17's, but I do wish they were 55 instead of 45.
Your thinking is backwards. If you want 55's think about 16 inch wheels.

Tires for 18 inch wheels for the E will have a 40 at max 45 aspect ratio.

Wheel prices for 18 inches can vary from $400 to $2000. Then you have to buy tires. Or you could look for a Voloster/Sonata owner that is buying new wheels and buy his used wheel/tire combo.
 
#28 ·
I hope this is not off-topic, but don't you feel a little uncomfortable with so little rubber between the tire and the road? These pictures -- admittedly, they look good -- make me think they'd pop on every other pothole on the road, and the ride must be harsh. My Elantra's P205/55R16 already look so skinny next to my 1996 Camry's 205/65HR15. I can't say I'm comfortable with how modern cars' tires are so skinny these days.
 
#30 ·
I didn't grow up an tire/car aficionado and now that I own my Elantra, I want to make it pop a little more!

Where can I find out what kind of tires are on my 2011 LTD?

Also, what exactly is offset and for example what does P215/45R17 mean?


I'm starting research to decide to just wheels or wheels and tires. Looking for a comfortable ride and something to lessen the high way noise.
 
#36 ·
18X8" +50 offset 225/45/18 just as we have been discussing.

Weight is 21.7lbs for wheels not like the 18.6lbs like the PF01 or the TSW but about $475 cheaper than the PF01 and $600 cheaper than the TSWs . Where the weight is save is in the tires. 22lbs compared the Bridgestone Potenza S-04 is $65 cheaper but weigh in at 25lbs.

21.7+22=43.7lbs compared to the stock 16s, which supposedly weigh 42lbs each.
 
#48 ·
You know..I'm just being honest here..I really don't know whether to commend those peeps who equipped their Elantras with 18" wheels (and it's not like the unsophisticated rear suspension is a secret) or just execute a double faceplam.

Sorry if I probably sound like an arse through this post.
And Bryan I am fully aware of the tooth-extractingly harsh ride I'll be in for, especially with having to go down to a 40mm sidewall to reduce the speedometer error. They will NOT be a year-round wheel.
The ride is a matter of perspective. Hyundai gave our E sedan the softest and least capable handling ride of all the Es. Most likely with the assumption that the majority of buyers wanted this kind of ride. I think they were correct.

Our E previously came with an anti-roll bar in the rear. Now The coupe and GT only come with the rear anti-roll bar and higher rate springs. All contribute to a firmer better handling ride.
Suspension helps differentiate Coupe and GT from Hyundai

Tires really are part of the suspension and the better handling tires do give a firmer ride. It is not the rear suspension in principal that gives the soft ride its the spring and shock rates. This also contributes to significant body roll and poor handling characteristics that are popular complaints.

18 inch wheels are just a continuing trend of bigger wheels for better handling and looks. Larger wheels and lower aspect ratio tires do handle and look better up to a point and again this is taste and perspective.

One person's firm ride seems like a "tooth-extractingly harsh ride" and to another its a firm ride, which is desirable and enjoyed.

BTW I just saw a new Veloster this morning with the same wheels.

 
#56 · (Edited)
Hey its a great feeling liking a set of wheels that personalize your pride and joy. Not so good for the wallet. :D
Before my 2013 Elantra(2007 Dodge Caliber), never had anything but my 15 inch steel wheels. But found some real nice Caliber 17 inch wheels with nice tires for only $50 on Craigslist.

........ anybody got alloys & tires for $50........ aha..... you say $1000-$1500 & that's the cheap stuff.....& no tires.......

I'll wait 5 years & look at Craigslist, again.
 
#54 ·
I'll be ordering these to fit the Sonata SE since we know those fit the Elantra.

LEXANI® LUST Wheels - Black with Machined Face and Groove Rims
Your reply confused me at first. Just enter the Elantra Info and then after that window:

"only guaranteed fitment wheel sizes are displayed for this vehicle
click here to view all available sizes for this wheel anyway"
This brings up all the sizes to choose from and you can pick the correct one as they are highlighted in bold for the most part. Since you know what the correct size and offset you want you can pick the best one. 17X7.5 or 18X8 with a +45 offset. You can also e-mail or call their wheel techs. I found them very knowledgeable by e-mail once they know your vehicle, which means they can find out the right answers.:)

On a side note has sbr711 or other tech on the board ever confirmed if the dealer can make changes to the ECU for tire diameter???

I did find this:
We have no service tool in shop for speedo/odometer caliberation/mileage adjustment.. if we replace a speedo, it ship to dealer first, then sent out to facility in CA I think it is to have correct mileage entered, sent back, and re-install.
http://www.hyundai-forums.com/231-m.../231-md-2011-elantra/154656-dealer-resetting-mileage-new-car-3.html#post1213587