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Old 01-15-2004, 03:02 PM   #1
White2.5GT
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Unhappy busted a Hakka 1

Ok I busted one of the hakkapeliitta 1 tires that I have on my legacy. (not my fault, long story though) Sidewall puncture, so it will not be repairable. I caontacted the distributer to get things covered for road hazzard. No problem, he setup an apointment and looked at it and it will be covered. He then spend the whole day trying to find a hakka 1 with studds in the same size as I have....nope none to be found only option is a replacment with a hakka 2 and he will replace 2 tire because you can't run two differant tires on the opposite size of the same axel.

I know your suppose to keep all 4 tires on AWD Subaru's the same so if I put the 2 new ones on the front and the older (but not very old) one's on the back will I mess up the differantals?


They measured the thread depth on the tires that I'm using now and there was 11.5/32nds remaining...which they guys said was almost new on the car.


so basically the fronts will have 12/32nds and the rears will have 11.5/32nds.

Here are the specs for each tire...

Hakka 1
Size: 205/55/R16
Load: 91T
Weight in LBS: 20.1
Rim width: 5.5-7.5
Measuring: 6.5
Overall Diameter: 24.9
Overall width: 8.4
Tread depth: 12.5/32nds
stud size (tsmi): 10

Hakka 2
Size: 205/55/R16
Load: 91T
Weight in LBS: 19.2
Rim width: 5.5-7.5
Measuring: 6.5
Overall Diameter: 24.9
Overall width: 8.4
Tread depth: 12/32nds
stud size (tsmi): 11
Stud size (mm) 8-10







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Old 01-15-2004, 05:01 PM   #2
AcquaCow
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I don't think you can run diff tread patterns on subaru AWD...

I mean, you could, but I heard it wasn't good for it.
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Old 01-15-2004, 07:37 PM   #3
White2.5GT
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I know you can't run different sizes or diameters, but I never heard anything about differant patterns. can anyone confirm this...
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Old 01-15-2004, 09:09 PM   #4
DetroitWRX
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Do they ware at different rates? I would watch ware and if one wares quicker than the other then you have a problem but I donít think you will the both should last about the same. I would be less concerned about having different tires. The old tires are so new that the small difference in size does not matter. The front and rear get different amount of traction all the time the different treads I don't think would hurt. When rolling on dry pavement you will not be able to tell and on bad roads the diffs are doing so much anyway the tires will not matter.

If you are really bothered you could get the credit of two new ones and get two more new ones and do it that way. You might be able to sell your three good ones and not be that far behind in the end.

Worst case you get them and it does screw your diff now you have a reason to get STI one. I would roll the dice and say you are good to go.
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Old 01-16-2004, 12:25 AM   #5
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Because the overall diameters are identical and the treadwear nearly identical I would think you would be all right to run different tires on the front and rear. Perhaps you can guestimate treadwear by how long Hakka claims that each tire is supposed to last.

If you do go this route, you might want to rotate the tires more frequently at first - say at half the recommended 7500 mile interval - then do a circumference measurement and see if the wear is radically different.

I imagine in snowy or icy conditions the tires would have different levels of grip so the AWD "from the wheels that grip to the wheels that slip" mechanism might have to work harder. Perhaps someone who actually understands this could agree/disagree.

On the other hand your "old" tires are so new you could probably sell them pretty easily. Perhaps the way to go is buy two more new Hakka 2s and sell your three used Hakka 1s. Then you have peace of mind and shouldn't end up too far in the hole financially. Always something, eh?
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Old 01-17-2004, 12:02 AM   #6
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Come on... there's no problem here. This is fine.
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Old 01-17-2004, 06:22 PM   #7
White2.5GT
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subaru recomends the tire be within a 1/4 inch circumfrence...can anybody calculate what mine will be with the info that I have provided?

Thanks again for all the great replies....
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Old 01-18-2004, 03:03 AM   #8
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It has been a while but...

Circumference = pie * Diameter

so the new tires
24.9 * 3.14 = 78.19

and the slightly worn tires:

(24.9 - 1/2 / 32) * pie
(24.9 - 1/ 64) * pie
(24.9 - .02 ) * pie
24.88 * 3.14 = 78.14

So the difference in circumference is
78.19 - 18.14 = .05 inches.

You are well within spec of .25 inches.
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Old 01-18-2004, 07:50 AM   #9
White2.5GT
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fantastic...thanks VOAM

you da man!
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Old 01-26-2004, 05:28 PM   #10
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****UPDATE****

I thought I would give you guys an update on progress so far.

One of the Hakka tire's showed up really early from Montreal (in like a day) very strange until the guys at the shop noticed that they sent it Air instead of ground at no extra charge , but they only had one tire... it was figured that the other one was coming by ground, deadline came and passed, no tire...the local tire dealer called the courier and they said they must have lost it! so they are trying to find the last place it went, and they don't think it left the terminal in Montreal.

So I have on tire to replace the busted one...I have the tire on even though the rest are Hakka 1's and this one is a Hakka 2. I still have the car in FWD (fuse) and I figure the safest thing to do would be to leave it in FWD until the other tire gets here in a week I guess!

Are there any speed restrictions with the car in FWD? (I know it is only 80 KM/h with the dummy tire on, part of the reason I had to get it off and get this tire on)

or could I go back to AWD considering the differance in the tires left to right is only 0.05 inches as pointed out by VOAM.

I miss AWD dearly!

PS: I only put the new tire on the car 5 mins ago, so I haven't done any driving with the car in FWD or AWD with the tire setup like this yet...I just had to get the dummy tire off the car (had it parked ever since and have been bumming rides to work!)
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Old 01-27-2004, 09:00 AM   #11
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subaru also says to not mix and match tire models/tread patterns.

RTFM
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Old 01-28-2004, 09:45 AM   #12
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bump
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Old 01-28-2004, 03:23 PM   #13
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well, I just drove 50+ highway miles to and from school on 3 225/45/17 and one 205/55/16 (stock)...st full size, they are .3" difference.

Even tho I have a manual RS, I didnt see any problems. Until the other tire comes in, its better to drive on a full size tire than drive on the spare (spare is smaller than the .25" requirement for subarus) I would say put the single new tire on, and take it easy, no long trips, and keep speeds at or below highway speeds.
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Old 01-28-2004, 05:45 PM   #14
White2.5GT
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Thanks...That's what I have been doing so far....

ps: I saw your thread, ouch, I hope you get it fixed soon.
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