Need advise on tires with different load index
Thread Starter
Joined: Mar 2011
Posts: 2
Need advise on tires with different load index
I have 2007 Honda Accord and it came with Michelin Energy MXV4® S8 - P205/60R16 91V. Now i have to replace my front tires as one of them is blown out and the other is worn out. Can i buy and use Michelin Primacy MXV4® Size: 205/60R16 92V as the two front tires while retaining the original ones(P205/60R16 91V) in the rear ?
The only difference between the front and rear tires will be the load index. The new Michelin Primacy tires has 92 load index where as the original one,Michelin Energy, has 91 load index. Will mixing different load indexes cause a problem ?
I hardly drive more than 6000 miles a year. But whenever i do drive on highways i do drive at around 90 mph.
The only difference between the front and rear tires will be the load index. The new Michelin Primacy tires has 92 load index where as the original one,Michelin Energy, has 91 load index. Will mixing different load indexes cause a problem ?
I hardly drive more than 6000 miles a year. But whenever i do drive on highways i do drive at around 90 mph.
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
No problem, load index 91 & 92 are pretty close together.
Same speed rating (V) is good.
Energy vs. Primacy might have a little bit different slip ratios, which can influence handling. But it's probably a subtle difference.
Your owners manual should say what the MINIMUM load index is required, I bet it's smaller than even 91.
Same speed rating (V) is good.
Energy vs. Primacy might have a little bit different slip ratios, which can influence handling. But it's probably a subtle difference.
Your owners manual should say what the MINIMUM load index is required, I bet it's smaller than even 91.
Thread Starter
Joined: Mar 2011
Posts: 2
Thanks Jim.Just trying to get more details on what you mentioned - 'different slip ratios which can influence handling'.Are there any precautionary measures that i could take while driving to avoid the influence on handling ?
PS:I am newbie to driving.
PS:I am newbie to driving.
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
The only real precaution is to have all 4 tires matching perfectly. But don't sweat it. Unless you drive close to the limit of control, you'll be fine. Just don't go so fast that you're anywhere close to losing control.
The long technical story, which you're welcome to ignore...
Let's say you drive in a strong crosswind. If you keep the steering wheel pointed exactly straight ahead, the wind will blow you sideways. Different tires will allow a different amount of sideways "error". That's known as slip ratio. If your front tires have a different characteristic than your rear tires, that's just a little bit different. So if you do any road racing (like on a track, not on the road) you'll want to be careful about that when going around curves.
I'm not trying to teach a course in vehicle dynamics, so those of you out there who really know this stuff... YES I know I'm making a gross simplification.
The long technical story, which you're welcome to ignore...
Let's say you drive in a strong crosswind. If you keep the steering wheel pointed exactly straight ahead, the wind will blow you sideways. Different tires will allow a different amount of sideways "error". That's known as slip ratio. If your front tires have a different characteristic than your rear tires, that's just a little bit different. So if you do any road racing (like on a track, not on the road) you'll want to be careful about that when going around curves.
I'm not trying to teach a course in vehicle dynamics, so those of you out there who really know this stuff... YES I know I'm making a gross simplification.
Last edited by JimBlake; Mar 14, 2011 at 04:18 PM.
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