[nomoreammo]

Alright, after reading through 70+ pages and looking at examples, I'm gonna pull the trigger on some TSW Nurburgrings. I'm gonna throw stock tires on them since it's a new car and I don't want to go out and buy new rubber right away. It's going on a 2.0T base without brembos but I will be dropping it on Eibach Pro kits in the near future.


Front - 18x8.5 + 20 offset.
Rear - 18x9 +32 offset.

I know I'll need ~22 offset to be flush, but TSW has such shitty offsets it's not even funny.

I'll probably need to run some spacers in the back, right? I'm thinking 10mm spacers.

Any issues with this setup?

 

[Tilley]

^Yes, you'll be fine with that setup. A +10mm spacer would be ideal for the rears. Also, i would go with the Sportline's (if you're going to do drop springs) since you're only running 18's with stock rubber.

 

[nomoreammo]

Why the sportlines instead of the prokit?

I got a pretty decent deal on a set of prokits so I already have them sitting in my garage. Is it because sportlines give a slightly lower drop?

 

[Tilley]

^yep. I guess it really depends on what look you're going for. I guess I was putting my own personal judgement onto you lol I would've done Sportlines instead of the Pro-Kit. Just my .02

 

[Kracks_Koupe]

Good choice . I went 18x8.5 + 20 front . 18x10.5 + 27 rear. Front is dead flush. Rear pokes out a little. I need to post pix

 

[nomoreammo]

^yep. I guess it really depends on what look you're going for. I guess I was putting my own personal judgement onto you lol I would've done Sportlines instead of the Pro-Kit. Just my .02

No problem at all lol, sportlines look good but I couldn't pass up the deal for near-new Eibachs.

I'm glad that after reading all of those pages I at least learned something about tire sizes and offsets.

Still got no effin' clue about negative cambers and clearance though! :squint:

Good choice . I went 18x8.5 + 20 front . 18x10.5 + 27 rear. Front is dead flush. Rear pokes out a little. I need to post pix

Please post pics when you can! I hope my setup will be semi-aggressive looking; really getting tired of the 4x4 look.

One question though: can I run my setup without getting spacers for now?

 

[Tilley]

One question though: can I run my setup without getting spacers for now?

The OEM 19's are a 8.5" wide wheel with a +33 offset (rear). So I'd say that you should be fine

 

[ByzKing]

I was watching the rhys millen video on his modded gen and their 3rd,phase track run was with enkei 19s and 275s in the back i want yo find out his exact wheel tire combo and specs. Then that will be my choice... I really liked what i saw. However i may get some blue highlights on lip if avail

Sent from my SPH-D710 using AutoGuide App

 

[ben....]

So...

My primary goal is performance and handling. While I do want a sporty look, I'm not looking for any stretch.

The stock tires are 245/40-19R and 225/40-19F. So fronts are 2.4% smaller than rears, stock. Is there a reason for this?

I'm thinking I am going to run 275/35-19 in rears, which are basically stock-size diameter (slightly smaller -0.5%) and 245/40-19 front. That would result in a larger diameter in the front than stock but basically equal to the rears (slightly larger +0.5%). The speedometer reads off the rears, so that should be fine regardless. But is there any performance issues I should be aware of by changing the aspect ratio between f/r from -2.4% to +0.5%?

Regarding wheel, I'm going 19x8.5 +22 in the front. Can't decide on the rear though. Should I do 19x10 +22 or 19x9.5 +22? Which would result in similar stretch/fitment to the front? I think the 9.5s? I assume the 9.5s would also closer match the offset of the fronts?

 

[Snoopy0812]

Rear rotational differential is due to the OE stagger fitment, individual wheel sensors compensate for this. Max differential between front and rear without TCS issues is roughly 3%.

As with most RWD vehicles, Hyundai anticipated that the rears would wear faster than the fronts, by allowing the rears to have a higher rotational as they wear down it lowers the 2.4% closer to about 1.6% or lower. Now over time the fronts would also wear and need to be replaced, the 3% compensation value is in the event that you have near worn rears and brand new fronts which would bring the differential to a near 3%.

Speedo doesn't read off the rears, speedo has a dedicated vehicle speed sensor and a 4-channel wheel speed sensor for the TCS/ABS/SCS and other various systems that access individual wheel control.

You don't want to run tires that are larger in the front than in the rear in regards to rotational diameter, you'll have issues.

Keep in mind, the rear of the genesis coupe is wider than the front, the wheel track is almost half an inch in total difference between front and rear. If you follow the fenders it's almost two inches difference. My setup I've got a 1 inch difference between my rear and front track.

If you're going to go with a 10, do between +10 and +15, you don't want your tire getting too close to the strut. 9.5, between +15 and +20.

 

[13_gc_pb]

If you're going to go with a 10, do between +10 and +15, you don't want your tire getting too close to the strut. 9.5, between +15 and +20.

I don't know why your telling him to move the rim so far out of the wheel well, as you can see the tire is still 20mm from the strut with a 9.5 @ +27.

 

[ByzKing]

We should start making a list with complete specs.. So for those of us that wanna stay 19s and go wide, we can just refer to the list. or guys that want to go 18 or 20 we can do that too.
Lets start a spec list guys.. Because I'm still not sure what I need to get the Rhys millen 19's set up with 245s in front and 275s in back.. on 19's

 

[Tilley]

So...

My primary goal is performance and handling. While I do want a sporty look, I'm not looking for any stretch.

The stock tires are 245/40-19R and 225/40-19F. So fronts are 2.4% smaller than rears, stock. Is there a reason for this?

I'm thinking I am going to run 275/35-19 in rears, which are basically stock-size diameter (slightly smaller -0.5%) and 245/40-19 front. That would result in a larger diameter in the front than stock but basically equal to the rears (slightly larger +0.5%). The speedometer reads off the rears, so that should be fine regardless. But is there any performance issues I should be aware of by changing the aspect ratio between f/r from -2.4% to +0.5%?

Regarding wheel, I'm going 19x8.5 +22 in the front. Can't decide on the rear though. Should I do 19x10 +22 or 19x9.5 +22? Which would result in similar stretch/fitment to the front? I think the 9.5s? I assume the 9.5s would also closer match the offset of the fronts?

Rear rotational differential is due to the OE stagger fitment, individual wheel sensors compensate for this. Max differential between front and rear without TCS issues is roughly 3%.

As with most RWD vehicles, Hyundai anticipated that the rears would wear faster than the fronts, by allowing the rears to have a higher rotational as they wear down it lowers the 2.4% closer to about 1.6% or lower. Now over time the fronts would also wear and need to be replaced, the 3% compensation value is in the event that you have near worn rears and brand new fronts which would bring the differential to a near 3%.

Speedo doesn't read off the rears, speedo has a dedicated vehicle speed sensor and a 4-channel wheel speed sensor for the TCS/ABS/SCS and other various systems that access individual wheel control.

You don't want to run tires that are larger in the front than in the rear in regards to rotational diameter, you'll have issues.

Keep in mind, the rear of the genesis coupe is wider than the front, the wheel track is almost half an inch in total difference between front and rear. If you follow the fenders it's almost two inches difference. My setup I've got a 1 inch difference between my rear and front track.

If you're going to go with a 10, do between +10 and +15, you don't want your tire getting too close to the strut. 9.5, between +15 and +20.

He's right about everything, except the last part. I'm running a 285 tire on a 10.5" wheel in the rear with a +25 offset, and I've still got a good bit of room between the tire and the strut.

 

[ByzKing]

He's right about everything, except the last part. I'm running a 285 tire on a 10.5" wheel in the rear with a +25 offset, and I've still got a good bit of room between the tire and the strut.

So what are you exact wheel and tire specs?
Because the Rhys Millen setup is 245's on front and 275's on back.. and I'd really like to go with that... I'm just having a hard time understanding and there is far to much data to process effectively.

 

[Tilley]

^I feel like I've answered this question about 20 times in this thread alone haha but no worries ....
Front - 20x9 +25 w/ 255/30/20
Rear - 20x10.5 +25 w/ 285/30/20

You can fit that setup you want as long as you have the correct wheel offset

 

[ByzKing]

yeah, that would be perfect for me if I was going 20's.. that's no dice for me.. I'm staying 19's...

 

[HjunG7i]

lol... the chart I made answers most of the questions...

It's like a page or two back for the people that want to go wide on 19s.
245/275 as well....

Screw it not finishing the chart to accomodate spacers or no camber fitments..

LOL...

 

[Jorge@UNIQPERFORMANCE]

Harry's chart!

 

[Tilley]

yeah, that would be perfect for me if I was going 20's.. that's no dice for me.. I'm staying 19's...

All you would have to do is go to a 35 series tire lol All you're doing is compensating for the overall diameter by going from my 20" wheel w/ 30 series tires, to your 19" wheel w/ 35 series tires. Offsets and tires widths could be the same

 

[Snoopy0812]

I don't know why your telling him to move the rim so far out of the wheel well, as you can see the tire is still 20mm from the strut with a 9.5 @ +27.

[IG]http://www.gencoupe.com/members/30927-13_gc_pb-album1430-13-pb-2-0t-premium-work-progress-picture9401-genesis-rear-measurements.jpg

He's right about everything, except the last part. I'm running a 285 tire on a 10.5" wheel in the rear with a +25 offset, and I've still got a good bit of room between the tire and the strut.

I'm new to tire sizing