XL tire load rating? A Problem?

spearfish25 · 06-15-2010, 10:07 PM

I'm going to order some Hankook Ventus V12s given their overall pretty good reviews and improved treadlife over the Bridgestones.

My plan is to get 255/40/19s for the front and 285/35/19s for the rear, which will give a bit wider tread on both axles. But I came across a warning on the TireRack website for the front tires. At that size, they are actually XL load rated. TireRack warns that it may yield a harsh ride (I think they require a higher tire pressure...40something psi).

So, any problems with using an XL tire? This is definitely the size I want, but I don't need problems.

ChrisSlicks · 06-15-2010, 10:25 PM

The "load pressure" is the pressure at which the tire achieves its load rating. XL rated tires have a higher load rating at a higher pressure but that doesn't mean you have to run the tire at that pressure, especially if you don't need the extra capacity. The XL tires will have a slightly stiffer sidewall but with the Ventus I wouldn't expect anything extreme.

TreeSemdyZee · 06-16-2010, 12:57 AM

I'm gonna guess that a front tire of that size is going to make your steering a little more difficult (understeer).

spearfish25 · 06-16-2010, 10:00 AM

The stock fronts are 245...255 is a modest increase and I'm making the same 10mm increase in the rear. Balance should remain the same. I can also adjust my sways as needed.

Also, an increase in front tire width alone would yield increased traction up front...LESS UNDERsteer. My power steering cooler is being upgraded to assist with the extra duty.

ChrisSlicks · 06-16-2010, 10:21 AM

The tire size isn't an issue. I run 275's up front on both street and race tires and haven't had any problem. The power steering fluid does get really hot after some aggressive sessions so an upgraded cooler is a good idea.

vipor · 06-16-2010, 10:25 AM

I'll be getting my 275/305 Hankooks this week. We shall see!

TreeSemdyZee · 06-16-2010, 11:08 AM

Quote:

Originally Posted by spearfish25

The stock fronts are 245...255 is a modest increase and I'm making the same 10mm increase in the rear. Balance should remain the same. I can also adjust my sways as needed.

Also, an increase in front tire width alone would yield increased traction up front...LESS UNDERsteer. My power steering cooler is being upgraded to assist with the extra duty.

Doh! Guess I got it bass-ackwards.

spearfish25 · 06-16-2010, 11:14 AM

Quote:

Originally Posted by vipor

I'll be getting my 275/305 Hankooks this week. We shall see!

Do tell how that setup works out. What rims are you using? You're making me think I should go wider. I take it 275 up front doesn't rub if you guys are all running that width.

cossie1600 · 06-16-2010, 11:29 AM

265 35 19 f and 285 35 19r works for me on re11. speedo is spot on

vipor · 06-16-2010, 11:48 AM

Quote:

Originally Posted by spearfish25

Do tell how that setup works out. What rims are you using? You're making me think I should go wider. I take it 275 up front doesn't rub if you guys are all running that width.

nismo wheels

stock is 245/40 and 285/35

06-15-2010, 10:07 PM	#1 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	XL tire load rating? A Problem? I'm going to order some Hankook Ventus V12s given their overall pretty good reviews and improved treadlife over the Bridgestones. My plan is to get 255/40/19s for the front and 285/35/19s for the rear, which will give a bit wider tread on both axles. But I came across a warning on the TireRack website for the front tires. At that size, they are actually XL load rated. TireRack warns that it may yield a harsh ride (I think they require a higher tire pressure...40something psi). So, any problems with using an XL tire? This is definitely the size I want, but I don't need problems. __________________ 2013 Cadillac V-Wagon, RIP Z

06-15-2010, 10:25 PM	#2 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The "load pressure" is the pressure at which the tire achieves its load rating. XL rated tires have a higher load rating at a higher pressure but that doesn't mean you have to run the tire at that pressure, especially if you don't need the extra capacity. The XL tires will have a slightly stiffer sidewall but with the Ventus I wouldn't expect anything extreme. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

06-16-2010, 10:00 AM	#4 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	The stock fronts are 245...255 is a modest increase and I'm making the same 10mm increase in the rear. Balance should remain the same. I can also adjust my sways as needed. Also, an increase in front tire width alone would yield increased traction up front...LESS UNDERsteer. My power steering cooler is being upgraded to assist with the extra duty. __________________ 2013 Cadillac V-Wagon, RIP Z Last edited by spearfish25; 06-16-2010 at 10:02 AM.

06-16-2010, 10:21 AM	#5 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The tire size isn't an issue. I run 275's up front on both street and race tires and haven't had any problem. The power steering fluid does get really hot after some aggressive sessions so an upgraded cooler is a good idea. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

06-16-2010, 10:25 AM	#6 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	I'll be getting my 275/305 Hankooks this week. We shall see! __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

06-16-2010, 12:57 AM	#3 (permalink)
TreeSemdyZee Premium Member Join Date: Dec 2009 Location: Kentuck-IANA Age: 60 Posts: 4,885 Drives: '09 370 & ‘14 Juke Rep Power: 27408	I'm gonna guess that a front tire of that size is going to make your steering a little more difficult (understeer).

06-16-2010, 11:29 AM	#9 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	265 35 19 f and 285 35 19r works for me on re11. speedo is spot on

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Urgent: Replace tire or patch? [Tire Section]	dudafunk	Nissan 370Z General Discussions	0	04-03-2010 01:29 PM
Tire Problem	OldGuy	Wheels & Tires	16	03-19-2010 09:23 AM
New Roadster, Spoiler problem, dealer problem	Hello	Nissan 370Z General Discussions	26	01-11-2010 06:22 PM
HP Rating NOT Really Overrated As Some Think	ZKindaGuy	Nissan 370Z General Discussions	27	11-08-2009 01:52 PM
Tire Pressure Monitoring System; Do you get details on each tire?	raps101	Wheels & Tires	20	06-29-2009 10:17 AM