Wider tires on sport rims?

spearfish25 · 11-28-2009, 10:43 PM

As I wear my way through the stock rubber on my sport rims, I'm looking for my replacement tires. I've pretty much decided on the Ventus v12s. However I'd like to go wider on the tires, particularly the rear.

So, a couple questions:
1) How much wider can I go on the sport rims? Stock rear size is 275/35R19 and front 245/40R19. I don't want to push the limits or stretch/squeeze the tires.

2). How do I keep the rolling circumference the same? For example, if I can put 285s on the rear rims, do I still keep the 35 proportion?

Thanks in advance.

Chan Chee Hoe · 11-29-2009, 12:00 AM

I think 285/35-19 on the rear is fine,same size as the NISMO 370Z..

Brazilbro · 11-29-2009, 01:25 AM

Someones already put 305s on the stockers

schrute · 11-29-2009, 02:33 AM

I have 295's on a 10" rim and wouldn't go any wider personally.

Just checked Hankook's size chart and in 19" you could go 255/35 Front and 295/30 Rear which have the same overall diameter front and rear (26.0) but are a bit shorter than stock. Differences with the shorter tires would of course be ride height (car would sit about .3" lower) and a little quicker off the line, with a corresponding loss (marginal) at the top end. You would also gain a little understeer with a 40mm stagger (difference between front and rear), likely not a big deal anywhere outside of the track (especially considering the Nismo has a 40mm stagger stock). Sways would make a big difference here.

Closer to stock diameter you could go 255/40 Front and 285/35 Rear (don't see a 295/35 listed), which are close enough to each other in overall diameter (within .2") but just slightly taller than stock.

Personally I'd go with the 255/35, 295/30 option, especially if you plan to add sways.

Minicobra1 · 11-29-2009, 01:39 PM

I'm running the Hankook V12's 305/30/19 Rear 255/35/19 fronts. The rear tire has a slight squeeze, but not too bad IMO. A 295 would be more Ideal for a 10 rim. I'm planning on changing to 10.5 rim very soon, so thats was why I went with the 305.
Overall the car feels very good, great tire for the money.

I'm running the Eibach springs with 15mm frt & 20mm rear wheel spacers. No rubbing issues on the fenders what so ever. However since these tires are slightly smaller in height I have notice that my front wheel air diffusers and chin spoiler scrape more often on driveways and large bumps. I was hoping to go with coil overs and lessen the wheel gap by about 1/2 inch more, but now I'm re-thinking that. I would definitely have to remove the chin and wheel deflectors if I did that, I'm actually considering taking them off now.

spearfish25 · 11-29-2009, 10:15 PM

Thanks for the advice guys. I've written down my specs for the V12s...going with 255/35 and 295/30s. Can't wait to burn through my stock rubber now so I can make the upgrade

spearfish25 · 11-29-2009, 11:35 PM

Why would those tires benefit from sways? Would they compensate for understeer in a 40mm stagger setup? I'm rather new to some of these mod interactions.

ZForce · 12-02-2009, 02:51 PM

Quote:

Originally Posted by Minicobra1

I'm running the Hankook V12's 305/30/19 Rear 255/35/19 fronts. The rear tire has a slight squeeze, but not too bad IMO. A 295 would be more Ideal for a 10 rim. I'm planning on changing to 10.5 rim very soon, so thats was why I went with the 305.
Overall the car feels very good, great tire for the money.

I'm running the Eibach springs with 15mm frt & 20mm rear wheel spacers. No rubbing issues on the fenders what so ever. However since these tires are slightly smaller in height I have notice that my front wheel air diffusers and chin spoiler scrape more often on driveways and large bumps. I was hoping to go with coil overs and lessen the wheel gap by about 1/2 inch more, but now I'm re-thinking that. I would definitely have to remove the chin and wheel deflectors if I did that, I'm actually considering taking them off now.

Any pics?
(OT) I am about to pull the trigger on some wheel spacers 15mm fr & 25mm rr and remember your comment on another thread suggesting to consider the 20mm rr in the event I may want to oversize the rear tire upon replacement and rubbing issues.

(back on topic) My question (even though I know you went with 305's on the rear), do the oversize rear tires look out of place on the sport rim? I have seen in many cases with oversizing the tire on stock rims and they look like the Michelin man.

Minicobra1 · 12-05-2009, 07:32 PM

Quote:

Originally Posted by ZForce

Any pics?
(OT) I am about to pull the trigger on some wheel spacers 15mm fr & 25mm rr and remember your comment on another thread suggesting to consider the 20mm rr in the event I may want to oversize the rear tire upon replacement and rubbing issues.

(back on topic) My question (even though I know you went with 305's on the rear), do the oversize rear tires look out of place on the sport rim? I have seen in many cases with oversizing the tire on stock rims and they look like the Michelin man.

Here are some pics with the 305/30/19 rear and 20mm spacers and 1"inch drop. IMO: I don't think the tire bulge is all that bad, but Ideally I would prefer a 10.5 rim :-)
As far as 25mm spacers go, I personally wouldn't do it, unless you have some neg camber, as it stands with mine I dialed out the camber with some SPC adjustable arms, the 25mm spacers would probably make the tire stick out past the fender.

spearfish25 · 12-05-2009, 09:08 PM

Looks good to me. I don't see too much bulge. Do you have a pic from the back so I can appreciate the super wide rubber?

370Zsteve · 12-05-2009, 09:12 PM

You lads should read and understand this before messing with widths

Dunlop Tires | Care & Maintenance | Rim width and aspect ratio

antennahead · 12-05-2009, 09:17 PM

Quote:

Originally Posted by spearfish25

Why would those tires benefit from sways? Would they compensate for understeer in a 40mm stagger setup? I'm rather new to some of these mod interactions.

Some of the pros here are better equiped to answer this, but from my research, aftermarket sways will typically reduce understeer and move the car back towards neutral. For example, I am about to add Stillens to my car, daily driver. The fronts are 29% stiffer than stock, and the rears, in their stiffest setting (which everyone here recommends, as well as Stillen) are 70%stiffer than stock. So you can see, this sway setup will dial oversteer back in, taking the car from factory understeer more to neutral. A 40 or 50mm stagger will add understeer, so if your sway setup has taken the car to neutral or slight oversteer, that much stagger will dial some oversteer out.

John

Minicobra1 · 12-06-2009, 01:26 PM

Quote:

Originally Posted by spearfish25

Looks good to me. I don't see too much bulge. Do you have a pic from the back so I can appreciate the super wide rubber?

My other car was parked behind it, so I couldn't get one. We just installed the new Berk catback exhaust last night, so I will be taking pics of the back, as well as video of the new awesome sound!

This car sounds like a baby Ferrari now!!

spearfish25 · 12-06-2009, 06:32 PM

Definitely in for Berk CBE pics and vids

theDreamer · 12-06-2009, 06:37 PM

Wait...you have the final production Berk exhaust with the X pipe?

11-28-2009, 10:43 PM	#1 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Wider tires on sport rims? As I wear my way through the stock rubber on my sport rims, I'm looking for my replacement tires. I've pretty much decided on the Ventus v12s. However I'd like to go wider on the tires, particularly the rear. So, a couple questions: 1) How much wider can I go on the sport rims? Stock rear size is 275/35R19 and front 245/40R19. I don't want to push the limits or stretch/squeeze the tires. 2). How do I keep the rolling circumference the same? For example, if I can put 285s on the rear rims, do I still keep the 35 proportion? Thanks in advance. __________________ 2013 Cadillac V-Wagon, RIP Z

11-29-2009, 01:25 AM	#3 (permalink)
Brazilbro A True Z Fanatic Join Date: Mar 2009 Location: Indianapolis, IN Posts: 1,131 Drives: Juke/240Z Rep Power: 848	Someones already put 305s on the stockers __________________ Juke AWD/240Z SR20 08 Evo 10(Stage 2) SOLD Fastest Sport 6spd 370Z 11.8 @126.5SOLD

11-29-2009, 02:33 AM	#4 (permalink)
schrute Track Member Join Date: Aug 2009 Location: utah Posts: 781 Drives: my z every day Rep Power: 17	I have 295's on a 10" rim and wouldn't go any wider personally. Just checked Hankook's size chart and in 19" you could go 255/35 Front and 295/30 Rear which have the same overall diameter front and rear (26.0) but are a bit shorter than stock. Differences with the shorter tires would of course be ride height (car would sit about .3" lower) and a little quicker off the line, with a corresponding loss (marginal) at the top end. You would also gain a little understeer with a 40mm stagger (difference between front and rear), likely not a big deal anywhere outside of the track (especially considering the Nismo has a 40mm stagger stock). Sways would make a big difference here. Closer to stock diameter you could go 255/40 Front and 285/35 Rear (don't see a 295/35 listed), which are close enough to each other in overall diameter (within .2") but just slightly taller than stock. Personally I'd go with the 255/35, 295/30 option, especially if you plan to add sways. __________________ my journal \| 2009 370z touring \| 6mt \| platinum graphite \| my album second skin \| mr works \| fast intentions \| ssr \| eibach \| hotchkis \| spc \| toyo \| bluebatmobile \| v-led \| jwt \| ventureshield \| tinted tails

11-29-2009, 01:39 PM	#5 (permalink)
Minicobra1 A True Z Fanatic Join Date: Nov 2008 Location: Orange County, CA. Posts: 1,205 Drives: 370Z Tour, Spt, 6mt Rep Power: 644	I'm running the Hankook V12's 305/30/19 Rear 255/35/19 fronts. The rear tire has a slight squeeze, but not too bad IMO. A 295 would be more Ideal for a 10 rim. I'm planning on changing to 10.5 rim very soon, so thats was why I went with the 305. Overall the car feels very good, great tire for the money. I'm running the Eibach springs with 15mm frt & 20mm rear wheel spacers. No rubbing issues on the fenders what so ever. However since these tires are slightly smaller in height I have notice that my front wheel air diffusers and chin spoiler scrape more often on driveways and large bumps. I was hoping to go with coil overs and lessen the wheel gap by about 1/2 inch more, but now I'm re-thinking that. I would definitely have to remove the chin and wheel deflectors if I did that, I'm actually considering taking them off now. DeanoL likes this. __________________ 370z Tour\| Spt Pack\|Navi\|BERK CBE\|Berk HFC's\| Eibach Springs\| Hotchkis Sway Bars\|SPC Camber Arms\|15mm Ichiba Wheel Spacers\| 19"Factory Nismo Wheels-Matt Black\|Stop Tech Rotors\|TWM Shifter\|3M Tint\|Black Fangs\|Black Rear Valance\|JDM Fog Light\| MY BAND-www.myspace.com/petroleum

11-29-2009, 10:15 PM	#6 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Thanks for the advice guys. I've written down my specs for the V12s...going with 255/35 and 295/30s. Can't wait to burn through my stock rubber now so I can make the upgrade __________________ 2013 Cadillac V-Wagon, RIP Z

11-29-2009, 12:00 AM	#2 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	I think 285/35-19 on the rear is fine,same size as the NISMO 370Z..

11-29-2009, 11:35 PM	#7 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Why would those tires benefit from sways? Would they compensate for understeer in a 40mm stagger setup? I'm rather new to some of these mod interactions. __________________ 2013 Cadillac V-Wagon, RIP Z Last edited by spearfish25; 11-29-2009 at 11:38 PM.

12-05-2009, 09:08 PM	#10 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Looks good to me. I don't see too much bulge. Do you have a pic from the back so I can appreciate the super wide rubber? __________________ 2013 Cadillac V-Wagon, RIP Z

12-05-2009, 09:12 PM	#11 (permalink)
370Zsteve A True Z Fanatic Join Date: Sep 2009 Location: Gold Coast CT Posts: 10,599 Drives: 2019 Corvette G.S. Rep Power: 43	You lads should read and understand this before messing with widths Dunlop Tires \| Care & Maintenance \| Rim width and aspect ratio __________________ SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

12-06-2009, 06:32 PM	#14 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Definitely in for Berk CBE pics and vids __________________ 2013 Cadillac V-Wagon, RIP Z

12-06-2009, 06:37 PM	#15 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	Wait...you have the final production Berk exhaust with the X pipe? __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

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