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Thread: Insurance wants to replace a single tire after collision Reply to Thread
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  Topic Review (Newest First)
01-23-2019 02:55 PM
tuswm I love his entire channel!
01-23-2019 02:55 PM
tuswm
01-17-2019 08:07 PM
idosubaru
Quote:
Originally Posted by PRGMC View Post
If your/their insurance refuses to pay fort the replacement of all 4 tires, sue the perp who hit you in Small Claims Court.
if it wasn’t their fault there’s no need for small claims, waste of time. You can get them to basically do whatever you want. They will bend over backwards to be fair and make it a “good” experience.

I’m assuming there’s no fault if they’re not accommodating here which can make it a little trickier depending on variables. One may not always want to play hardball with their own insurance.
01-17-2019 08:03 PM
idosubaru
Quote:
Originally Posted by Brucey View Post
The only reason I'm against a 5 tire rotation is because of Subaru's awful implemention of TPMS requiring a trip to the garage to turn off a dash light.

I think the 5 tire rotation is the best method if one ignores the dash light but I just hate seeing it.

There is always the electric tape method.

I agree about having more flexibility in the tread by having some miles on the spare though.

Guess I could run the current tires down then switch them out with the spare.
I was joking about the “I see issues” comment BTW.

Oh snap the TPMS, right, I totally forgot those pesky pests!
01-17-2019 06:11 PM
PRGMC If your/their insurance refuses to pay fort the replacement of all 4 tires, sue the perp who hit you in Small Claims Court.
01-17-2019 05:34 PM
Brucey
Quote:
Originally Posted by idosubaru View Post
Yes I see potential issues - read your statement then read the owners manual, you might be out of Subaru's specifications.

Could you rotate all 5 tires until the future spare gets just low enough that it passes specifications for replacing a new tire, and thereby gains your lower end range if it also replaces a tire with less tread? Let's say you have 2/32 to play with - an 11/32 new tire can only cover 9/32-11/32. If you have a 9/32 spare you double your coverage to 11/32 to 7/32, covering most situations.

Personally, I wouldn't worry about it. There's a reasonable chance you'll be in spec, VTD's are beasts, and there's no compelling trend. Over 20 years I have seen enough "bought new/rotated frequently/always been in spec" people get torque bind that it doesn't seem to be a compelling trend of issues if we ignore the eggregiously ill maintained stuff which clearly yours won't be.

Why not rotate all 5 and get your interior all trashy from these gross winter roads? ! haha
After a few years the spare becomes dated and a liability with any significant run time. If significant run time and 7 years of use aren't parts of the equation then maybe the original question isn't that critical?
The only reason I'm against a 5 tire rotation is because of Subaru's awful implemention of TPMS requiring a trip to the garage to turn off a dash light.

I think the 5 tire rotation is the best method if one ignores the dash light but I just hate seeing it.

There is always the electric tape method.

I agree about having more flexibility in the tread by having some miles on the spare though.

Guess I could run the current tires down then switch them out with the spare.
01-17-2019 04:07 PM
idosubaru
Quote:
Originally Posted by Brucey View Post
Do you see any potential issue with using a full size matching spare but only doing a 4 tire rotation?
Yes I see potential issues - read your statement then read the owners manual, you might be out of Subaru's specifications.

Could you rotate all 5 tires until the future spare gets just low enough that it passes specifications for replacing a new tire, and thereby gains your lower end range if it also replaces a tire with less tread? Let's say you have 2/32 to play with - an 11/32 new tire can only cover 9/32-11/32. If you have a 9/32 spare you double your coverage to 11/32 to 7/32, covering most situations.

Personally, I wouldn't worry about it. There's a reasonable chance you'll be in spec, VTD's are beasts, and there's no compelling trend. Over 20 years I have seen enough "bought new/rotated frequently/always been in spec" people get torque bind that it doesn't seem to be a compelling trend of issues if we ignore the eggregiously ill maintained stuff which clearly yours won't be.

Why not rotate all 5 and get your interior all trashy from these gross winter roads? ! haha
After a few years the spare becomes dated and a liability with any significant run time. If significant run time and 7 years of use aren't parts of the equation then maybe the original question isn't that critical?
01-17-2019 01:47 PM
brucep
Quote:
Originally Posted by mjohnson View Post
Current gens (3+) have an electronic feature that detects the mismatch tire at the rear and deals with the difference in circumference (stops sending power there/coasts), sort of like the fuse idea.
There is no physical way for subaru drivetrain to "stop sending power" to an individual wheel. However, if a mismatch is detected (using wheelspeed sensors) the AWD system can disable itself and light some indicators on the dash.

NOTE: When I say "disable itself", I mean that the center diff will not attempt to 'lock up' and the ABS system will be disabled too. (because the ABS system is used to direct torque AWAY FROM individual wheels)
01-17-2019 11:14 AM
mjohnson
Quote:
Originally Posted by Evil Soob View Post
Everything I've read says all tires must be replaced at the same time and routinely rotated to ensure even wear of all tires. Which made me wonder, what if I have a flat? Can I use my spare? On older models, you can remove a fuse which converts to front wheel drive but to my knowledge, the Gen 3 on up doesn't have that option.

You'll probably need to get some verification from a reliable source on replacement of the other tires.

If you have a flat, you put the spare on a rear wheel and the other three good tires on the other wheels (if the flat is in the rear, straight swap. If you have a front flat, spare at rear and that rear tire goes to the front).



Current gens (3+) have an electronic feature that detects the mismatch tire at the rear and deals with the difference in circumference (stops sending power there/coasts), sort of like the fuse idea.


In the OPs case, either buy all new (pay for 3) and sell the three used ones or shave it down. Only two options unless you want to trash the drivetrain.
01-17-2019 09:49 AM
tuswm
Quote:
Originally Posted by skipw View Post
This handy website says the difference in diameter (and, thus, circumference) is 6%.




Nominal diameter of a 225/65R17 tire is 28.5" according to the tire size website. As someone noted, 11/32" tread wear (1/4" + 3/32") reduces the radius, not diameter, by that amount, from 14 1/4" (14.25") to 13 29/32" (13.90625"), about 2.4%.



See above.

The spare is intended for temporary use at limited speed for a limited distance. Long distances and high speed with mismatched tires is different, even if the mismatch is much less.
I was going to say this.
If you have different sized tires the differential is slipping or absorbing energy. Temperature is bad for differentials just like brakes. To a certain temp you are ok, then you just not.

This of the spare tire as slamming on the brakes. Alot of abuse of a short period of time. yes there is wear, yes the temp goes up but because its so short, its OK. This is engineered in to the car. But having a different tires is like driving around on the free way with your emergency brake on even just a little. Real damage wont be done in a short distance but over many 10s or 100s of miles It can cause damage from both wear and or over heating.
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