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Old 09-18-2015, 11:33 AM   #1
Highland Ranger
 
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MPSS - K1 or K2?

Have we settled the K1/K2 controversy?

From my read of tire rack, specs are the same except K1 are wider . . . .

K1: http://www.tirerack.com/tires/tires....PSSXL&i1_Qty=2

K2: http://www.tirerack.com/tires/tires....SXLV2&i3_Qty=2

Looking to put 315s on rear and 285s on front of a stock 2014 Zl1 with stock rims and suspension
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Old 09-18-2015, 04:12 PM   #2
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My favorite topic !
The K1 tread is wider, but the K2 tread is deeper.
I would go K2, because I get a bit of rubbing with my K2s when a bit loaded.
The wider K1 would probably rub more or deeper.
But others seem to have no rubbing issues.
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Old 09-18-2015, 08:06 PM   #3
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I ordered 285s for front and 315 k2s. Seems like .3 inches for k2 should be OK, another .3 for k1s at a total of .6 over stock sounded like not worth the risk. Hopefully no issues.

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Old 09-19-2015, 08:11 AM   #4
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Have you found either one in stock somewhere?

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Old 09-19-2015, 02:49 PM   #5
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Both in stock at tirerack.com as are the 285s for front. 295s not in stock till 12/31/15.

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Old 09-22-2015, 07:11 PM   #6
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wow - they look big when they aren't tucked under the car.

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Old 09-23-2015, 02:02 PM   #7
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Ah...nothing like getting a fresh set of rubber.

Who is going to mount them ?
I would love to find a good installer in NJ.

I actually go all the way up to Jannetty.
They have the super swanky tire machine, and I know that they will do a careful job.
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Old 09-23-2015, 03:37 PM   #8
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Believe it or not have a great relationship with the dealer. They'll do it for me.
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Old 09-26-2015, 05:58 PM   #9
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Just a quick note since I started this thread. Difference is night and day. Mpss are far better and quieter than the OEM tires. BUT THE 315s DO RUB with two people in car. So unless you and your passengers all weigh 90lbs or you live somewhere with runway smooth roads, you are going to rub. Need to get under to figure out where.

I guess I get what I deserve for spending $800 based on something I "heard on the internet".

Now need to figure out what to do next.
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Old 09-26-2015, 07:00 PM   #10
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Sounds like you need to go on a food free diet for 6 months to hit that 90lbs target.
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Old 09-26-2015, 07:41 PM   #11
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Yeah. No. I'll hit 90lbs post mortem. No other way. Wonder if it being convertible makes a difference. Love the tires, might need to see if spacers are available. I think a half inch would do it.

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Old 09-27-2015, 11:14 AM   #12
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That's weird. I'm a convertible and have the MPSS 315 K2's on the back and have never had a rub problem. And that's with 4 people (2 adults, 2 teens) in the car.
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Old 09-27-2015, 01:40 PM   #13
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Quote:
Originally Posted by 97ChameleonTA View Post
That's weird. I'm a convertible and have the MPSS 315 K2's on the back and have never had a rub problem. And that's with 4 people (2 adults, 2 teens) in the car.
Hmmm. Thanks. Something weird going on. Need to do some testing.

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Old 11-01-2015, 07:15 PM   #14
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Follow up in this thread: http://www.camaro5.com/forums/showthread.php?t=420680
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Old 11-01-2015, 08:24 PM   #15
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Quote:
Originally Posted by Highland Ranger View Post
Have we settled the K1/K2 controversy?

From my read of tire rack, specs are the same except K1 are wider . . . .

K1: http://www.tirerack.com/tires/tires....PSSXL&i1_Qty=2

K2: http://www.tirerack.com/tires/tires....SXLV2&i3_Qty=2

Looking to put 315s on rear and 285s on front of a stock 2014 Zl1 with stock rims and suspension
If you go back to Tirerack, search for Michelins for your car, it should show 4 different tires in 315/35/20
Simply put a check mark next to the two PSS's in the 'compare' box, then select compare.

It'll nicely show specs for both side by side making it easy to see the differences.

Then again I'd expect you already did that.
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Old 11-01-2015, 08:28 PM   #16
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I know this doesn't make any sense, but I noticed from the pictures of your tires that you have the black 10-spoke wheels?
I have the 5-spoke polished wheels.

I know it shouldn't make any difference, but.......
Just trying to figure why yours seem to rub, but mine don't???
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Old 11-02-2015, 07:05 AM   #17
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Quote:
Originally Posted by HDRDTD View Post
I know this doesn't make any sense, but I noticed from the pictures of your tires that you have the black 10-spoke wheels?
I have the 5-spoke polished wheels.

I know it shouldn't make any difference, but.......
Just trying to figure why yours seem to rub, but mine don't???
That could be it - who knows. Stacked manufacturing tolerances one way or the other . . . . slight difference in rims and there you go.

The thing is - why only rub on one side and why did the OEM tires rub - again, not by much but the mark was there.
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