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Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires.


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Old 08-20-2018, 09:11 AM   #15
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I also installed the 07 WRX 4-pots and 2-pots, and can confirm the standard spare does not clear either front or rear. I purchased a spare for a 2006 WRX from a shop that parts out performance Subaru wrecks.
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Old 08-20-2018, 10:09 AM   #16
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I also installed the 07 WRX 4-pots and 2-pots, and can confirm the starndard spare does not clear either front or rear. I purchased a spare for a 2006 WRX from a shop that parts out performance Subaru wrecks.
Yikes, not even rears? That sucks.

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Old 08-20-2018, 10:16 AM   #17
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Yikes, not even rears? That sucks.



- Andrew


Not supposed to put a spare on the rear anyway, RTFM. The Torsen doesn't like that one bit.
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Old 08-20-2018, 10:29 AM   #18
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Not supposed to put a spare on the rear anyway, RTFM. The Torsen doesn't like that one bit.
That is true. Just surprised it doesn't even fit.

- Andrew
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Old 08-20-2018, 10:44 AM   #19
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Yikes, not even rears? That sucks.

- Andrew
The backside of the spare hits the outer piston of the caliper before seating on the hub. That spare shape really relies on the calipers being sliding style
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Old 08-20-2018, 12:51 PM   #20
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That is true. Just surprised it doesn't even fit.



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I'd hate for someone on here to lose their LSD over a flat tire.

I've seen 2 FRS's already at the Toyota dealer coming in with spares on the rear
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Old 08-20-2018, 04:29 PM   #21
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Subaru Parts gives just one part number, no difference between stock and PP...
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Old 08-20-2018, 04:30 PM   #22
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Wish one of these wouldn't cost me more than just getting an old STI spare.. which is also prohibitively expensive around here.
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Old 08-20-2018, 04:49 PM   #23
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Regarding LSD, i guess nobody reads manuals these days or LSD in stock car is too uncommon for most owners of cars with those to knew how easy it's to overheat and damage them with running different size wheels on axle with it. And it won't be warranty problem.

IIRC there were three subbie spacesaver wheels 5x100, two 16" and one 17". One of those 16" didn't clear even stock twins brakes. Maybe 17" spacesaver has bigger chance to clear PP calipers? Also how about trying out spacers? If using one helps, maybe worth bringing one around?
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Old 08-20-2018, 09:18 PM   #24
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As long as the circumference difference is within tolerance, from 1 to 3%, dependant on manufacture, it's fine for short distances.

http://www.tireconvert.com

If this wasn't the case, then all the vehicles that run torsen up front and mechanical rear set ups would be screwed.

As for OEM differences, my 2015 WRX STI OEM space saver had a different circumference than the OEM tyre.

TL;DR: you will not kill kittens, or your diff, if you ensure you choose the correct circumference within the allowed tolerances.
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Old 08-20-2018, 09:46 PM   #25
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86MLR: fwd cars with torsen in front too have mention in manual to use spacesavers only in rear. It's advisable to not use even uneven wear tires on axles with LSD. Yes, they will last longer with smaller difference, but still will heat up more, as they will work all the time, including driving in straight. More heat/higher temps = oil decomposes sooner, mechanical wear increases, diff life shortens. Even if it won't kill it right away, i'd prefer to not have to change it to new one after half a mileage. At very least more frequent oil changes should be done, so see no reason to skimp on putting front tire instead of flat rear & put spacesaver in front. Of course, the bigger the difference, the more overheat. Some tracked cars have diff covers with cooling ribs and/or fittings to connect external rad to cool diff oil. Simply straights don't cool enough them.
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Old 08-20-2018, 11:10 PM   #26
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86MLR: fwd cars with torsen in front too have mention in manual to use spacesavers only in rear. It's advisable to not use even uneven wear tires on axles with LSD. Yes, they will last longer with smaller difference, but still will heat up more, as they will work all the time, including driving in straight. More heat/higher temps = oil decomposes sooner, mechanical wear increases, diff life shortens. Even if it won't kill it right away, i'd prefer to not have to change it to new one after half a mileage. At very least more frequent oil changes should be done, so see no reason to skimp on putting front tire instead of flat rear & put spacesaver in front. Of course, the bigger the difference, the more overheat. Some tracked cars have diff covers with cooling ribs and/or fittings to connect external rad to cool diff oil. Simply straights don't cool enough them.
I acknowledge that the space saver is required to be put on the rear, the 2015 WRX STI manual states this, I believe this is more to do with braking/cornering, I could be wrong, and would be happy to be proved wrong, But, as the rear diff is also a LSD, would it not also cause these percieved issues?

The STI difference was -2.83% between the space saver and the OEM tyre, this was brought down to 1.23% when I repleced the OEM 245/40 18 with 265/35 18

http://www.tireconvert.com

My point was if you are looking for a spare ensure the circumference of the spare is typical or within tolerance to the tyre it replaces.

For this reason, when I was looking for a spare, the main factors for me was:

1. Full sized, 215/45 17 (when I'm heading to Queensland from Sydney, 11 hr drive, and I get a flat, I don't want to be limited to 80kph)
2. Clear Brembo's
3. Typical circumference and within acceptable tolerance (my full sized 86 spare has 0% difference)

These factors may not apply to everyone, but I believe that what I have always done was achieve the best result using sound engineering principles to achieve a required goal.

The only other variable I can see here would be a difference in tyre wear.
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Old 08-21-2018, 08:27 AM   #27
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The Aussie cars do not come with any spare but just the repair kit. Certainly doesn't appear to be a popular decision ( http://*************/toyota-86-repai...-au-community/ ) but would work in the case of an emergency. I have use similar kits in the past and as long as the tire isn't split or shredded they work fine for most flats.
I have actually considered going this route and doing away with the spare.
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Old 08-21-2018, 09:13 AM   #28
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Tcoat: new aussie twins with just the (imho useless, that does more harm then good) repair kit (IIRC change was @2015), just like EUDM/JDM ones (at least in UK twins forum space saver thread is rather popular ), since very beginning. Older AUDM twins one could get with full size spare (IIRC australian DM was only one with such option due country specific (long distances till closest living place or from closest roadside assistance). Or was it stock configuration?). USDM & Canada had spacesavers, no?
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