H-Rated Tires OK on 2007 IS250 AWD?
09-14-09, 08:42 PM
#1
Driver
Thread Starter
H-Rated Tires OK on 2007 IS250 AWD?
The original tires on my 2007 IS250 AWD are about due to be replaced. Been looking at Michelin Primacy MXV4's (Tire Rack rates these very highly). However, they are only H-speed rated (130 mph), while Lexus recommends V-rated (149 mph) or higher for this car. The chances of me ever exceeding 130 mph are nil. Is there any harm (or any other downside) in putting these tires on my IS?
09-15-09, 04:46 AM
#3
Lexus Champion
The original tires on my 2007 IS250 AWD are about due to be replaced. Been looking at Michelin Primacy MXV4's (Tire Rack rates these very highly). However, they are only H-speed rated (130 mph), while Lexus recommends V-rated (149 mph) or higher for this car. The chances of me ever exceeding 130 mph are nil. Is there any harm (or any other downside) in putting these tires on my IS?
09-15-09, 05:07 AM
#4
H rated tires will be fine! (Rated up to 130mph). For you to exceed the speed rating you would have to sustain speeds over 130mph for many minutes. Not to worry, H is more then enough!
Koz
Koz
Last edited by Koz; 09-15-09 at 05:10 AM.
09-15-09, 04:23 PM
#7
Keeping an eye on the pressures of your tires will be the most important thing over the rating. If you're going to go fast, add a few psi to help keep the temps down. Owner's Manual may actually make a note of this on the last page.
H-rated with extra PSI will be safer then Z-rated at factory PSI at high speeds, in my opinion. (Of course z-rated with the extra psi will be even better)
H-rated with extra PSI will be safer then Z-rated at factory PSI at high speeds, in my opinion. (Of course z-rated with the extra psi will be even better)
Last edited by raytseng; 09-15-09 at 04:42 PM.
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09-15-09, 04:35 PM
#9
You can always mix your tires, but for a tradeoff. Heck, when you're driving on a Spare tire, your car still works.
If the tire is exactly the same except for rating, and tread is about the same you should be OK
However, if there are differences, perhaps your car will drift to one side or when pushing to the performance limit the worse tire will give out first. Some tire shops will recommend you to replace a tires at a minimum in pairs to prevent side/side differences.
Usually this will not be a factor if you're not driving past the limit of H rating anyway.
However, if you have AWD you need to be very careful of mixing tires:
http://www.tirerack.com/tires/tirete....jsp?techid=18
If the tire is exactly the same except for rating, and tread is about the same you should be OK
However, if there are differences, perhaps your car will drift to one side or when pushing to the performance limit the worse tire will give out first. Some tire shops will recommend you to replace a tires at a minimum in pairs to prevent side/side differences.
Usually this will not be a factor if you're not driving past the limit of H rating anyway.
However, if you have AWD you need to be very careful of mixing tires:
http://www.tirerack.com/tires/tirete....jsp?techid=18
Last edited by raytseng; 09-15-09 at 04:41 PM.
09-15-09, 05:24 PM
#10
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You can always mix your tires, but for a tradeoff. Heck, when you're driving on a Spare tire, your car still works.
If the tire is exactly the same except for rating, and tread is about the same you should be OK
However, if there are differences, perhaps your car will drift to one side or when pushing to the performance limit the worse tire will give out first. Some tire shops will recommend you to replace a tires at a minimum in pairs to prevent side/side differences.
Usually this will not be a factor if you're not driving past the limit of H rating anyway.
However, if you have AWD you need to be very careful of mixing tires:
http://www.tirerack.com/tires/tirete....jsp?techid=18
If the tire is exactly the same except for rating, and tread is about the same you should be OK
However, if there are differences, perhaps your car will drift to one side or when pushing to the performance limit the worse tire will give out first. Some tire shops will recommend you to replace a tires at a minimum in pairs to prevent side/side differences.
Usually this will not be a factor if you're not driving past the limit of H rating anyway.
However, if you have AWD you need to be very careful of mixing tires:
http://www.tirerack.com/tires/tirete....jsp?techid=18
09-15-09, 05:53 PM
#11
Driver
Thread Starter
Same size as OEM, just a different speed rating.
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