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Need help with offset

6K views 10 replies 7 participants last post by  HoosierHyundai 
#1 · (Edited)
Hey guys im new here. I have a marina blue elantra mt, i have the 15" wheels im upgrading soon to 18"s but i need help with the offset. Can i see some pics with your elantra with 18x7.5 +45. Does it rub?
 

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#2 ·
195/65R15 Tires. 195/65R15 tires have a diameter of 25.0", a section width of 7.7", and a wheel diameter of 15". The circumference is 78.4" and the revolutions per mile are 808.

225/45R17 Tires. 225/45R17 tires have a diameter of 25.0", a section width of 8.9", and a wheel diameter of 17". The circumference is 78.4" and the revolutions per mile are 808.

Not sure about 18" rims, but typically, the diameter is still the same. To me the body of the SE looks just like the Limited, but have never made direct measurements. But one reason for buying it was to get a much wider thread for far superior winter traction. They do stick out the side, had to add splash shields or mud flaps, more like stone shields.

Next question is will the larger rims fit your lug bolt pattern. Could contact tirerack.com or others on the internet.

Could sit down with a base model, and add all the accessories you want, like cruise, electrically heated seats, better sound system, list go on, will be spending a lot more time and money buying aftermarket stuff. May problems with your auto insurance company, in my state, if you take your vehicle for new tires, they will only install the tires listed on your model, more problems.

Much cheaper and a heck of a lot less work to purchase what you want, and can always deal with the dealer to get a much greater price discount. Ha, getting lazy in my older years.

Had vehicles with 13-15 wheels, terrible on ice and snow.
 
#3 ·
I'm wondering why you would want 18" rims? You would need a 35% aspect ratio to try to keep the diameter stock which is going to ride really hard and you may find the selection of tires is limited and they are going to be expensive. You can get refurbished 17" wheels so you don't have to worry about offset or clearances and save yourself some money to put into shocks which will probably make a bigger difference in handling.
 
#6 · (Edited)
225/40/R18 are 25.087 inches in diameter so will be traveling a tad faster than 225/45R17 that are 25 inches in diameter..

But since the wheel diameter is an inch larger, the profile of the tire is lower that would receive less compression when making high speed turns. less give also results in a slightly stiffer ride, will feel a bit more on your back if you hit a small pothole.

No improvements in winter traction, thread width is the same, but not as popular as the R17's so more expensive, in regards to sport cars when driving in city rush hour traffic, still will be putting along at 2-5 mph.

Tons of information on the net on this subject, also shows price tags. last vehicle had a choice between R17's or R-18's, chose R-17's, cheaper for the same brand of tire.

Ha, see these performance magazines pick on the Elantra because its a half a second or so slower than other vehicles of its class.. Sure did not chose the Elantra for running it on the quarter mile.

Had that quarter mile bug when a kid, if you really want to make the fans happy, will blow your engine, even happier if you get injured or killed, this bug didn't last very long.
 
#7 ·
Hi OP,

Your wheel combo isn't going to rub. it's even going to stick out towards the fender as Petabyte stated. Now unless your suspension is lowered you will not rub. If you do lower the car to get rid of wheel gap you can get the fenders rolled if ever the wheels rub.

Now the tire width though might cause problems. there is a math to upsizing wheels and tires. you should stick to 215/45/18's :

205-55R16 vs 215-45R18 - Tire and Wheel Plus Sizing | Tire Size Calculator

This makes sure you stay within you speedometer acceptable percentage and will drive alot better. Last thing is if you don't lower your car, your gap between the wheel and fender will look larger and seem off.

All things to consider.

@ Nicholas D
 
#8 · (Edited)
Hi OP,

Your wheel combo isn't going to rub. it's even going to stick out towards the fender as Petabyte stated. Now unless your suspension is lowered you will not rub. If you do lower the car to get rid of wheel gap you can get the fenders rolled if ever the wheels rub.

Now the tire width though might cause problems. there is a math to upsizing wheels and tires. you should stick to 215/45/18's :

205-55R16 vs 215-45R18 - Tire and Wheel Plus Sizing | Tire Size Calculator

This makes sure you stay within you speedometer acceptable percentage and will drive alot better. Last thing is if you don't lower your car, your gap between the wheel and fender will look larger and seem off.

All things to consider.

@ Nicholas D

Ha, lowering a vehicle with only 5" of ground clearance, okay if you are driving on a bowling alley type road.

Other problems "may" arise is if your tires do not match the label on your vehicle. Many years of experience on this subject, insurance companies tie up the best law firms and if in involved in an accident, your fault or not, will do anything in their power to avoid paying a claim.

If you hire an attorney to defend you, will only be getting 2nd best.
 
#9 ·
@ Nicholas D

Did you click on the link? Did you compare both tire sizes and see for yourself?

I have driven lowered cars that were 2 inches off the ground and were safer, more comfortable and laster longer then OEM parts. It's called buying quality parts.

And yes we have potholes too but we swerve and avoid them like everyone else... Not all lowered cars are crap.

I thought this was a Car forum.. meaning we weren't against modifications.. Am I wrong?

@ Rudekaimo, do your homework, don't listen to heresay, Get the 18's but ask questions to the mechanics in the tire dealership, they know what they're taking about.
 
#10 ·
May want to take a peek at this site:

Insuring a Performance/Modified/Lifted or Lowered Vehicle in Canada, Ontario : MIKE MORAWSKI | Programming & Tech Blog

Canadian law is not much different than the US.

Product liability laws were passed in the late 60's, early 70's, before then, nobody cared what you did to your vehicle, and they became much worse since then. Read all the disclaimers in your 612 page owners manual.

Ford and GM get hit hard, for not locking the AT gear shift in park, Toyota, with a stuck TB throttle blame, its my opinion that the EPA is at fault for insisting all that carbon from the PCV be returned to the intake of this device, but can't sue the EPA. Takata on airbags, they only made the bags, not the stuff that hides them.

Wife was rear ended by a drunk around 20 months, was even arrested. But his insurance company still removed the tail lights from out car to make sure we were still using OEM brake lights. If they found mods, would not have covered us, even replacing a light bulb can be a major problem.

So tell me about mods. Ha, all those auto programs on Discovery and Velocity are bad misinforming jokes..Those vehicles are not even insurable.

Still have some freedom, can do anything you want for off road use.
 
#11 ·
Not saying not to mod a (street use) car if you want, but make an informed decision.

NicholasD is correct that there may indeed be liability consequences- perhaps worse in US than Canada.

And some mods can even get you tickets from the police.
In the US-
Unlawful Vehicle Modifications - FindLaw
And it seems at least some Canadian provinces too.
https://saaq.gouv.qc.ca/en/road-safety/modes-transportation/automobile/modified-cars/
http://www.mto.gov.on.ca/english/trucks/pdfs/passenger-light-duty-vehicle-inspection-standard.pdf
 
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