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Old 10-23-2009, 12:29 AM   #1
elementsk8trbam
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Default Stock tire is 205/50/17 Winter Tires are 225/50/17 WILL I HAVE A PROBLEM??

I want to put 225/50/17 on my stock 08 rims for winter, (stock tire size being 205/50/17) got a good deal on these tires, I know I wll run into the spedo problem but will there be any more serious problems such as tranny or difffs? Let me know guys!!
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Old 10-23-2009, 01:18 AM   #2
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Well, let's see here, I'm gonna fire up my trusty tire size calculator...

Just to start off with, I can't say what I really want to, because this is the Newbie forum... So I will say this. For snow tires, you typically want to go with 'more narrow' tires, not 'wider'. Think back to WRC, what do you see when they run Sweeden? 135 or so width tires. WIDE = Tarmac

Anyway, here's what the calculator says about fitment: Your winter tires are almost an inch taller than your stockers, and almost an entire inch wider as well. Since the 08's came with super massive fender flares of doom, I doubt you will have any issues with rubbing, however, you may have some suspension clearance issues, then again, you may not. I couldn't fit anything larger than stock tires on my 1998 LGT wagon, but that was a different car entirely than what you have.

Your speedometer is going to be off by a little more than 3% compared to what it normally reads, so when your speedo says 60 mph, you'll actually be going approx. 62 mph.

And, if you had gone with 225 45R17's, you would have been fine for outer diameter.

Also, last thing to keep in mind: If you have a 'summer' tire go flat, you cannot use one of your winter tires as a temporary spare, or vice versa, if you have a winter tire go flat, you cannot use a 'summer' tire as a temporary spare, as the outside diameter is way too different to do that (nearly an inch!). Also, when using your winter tires, you may not be able to use your OEM factory temporary spare, if you have a VLSD in the rear, center, and front. If you have an open front diff, you probably can get away with it, if you put the spare in the front.

You really should have done some research before you purchased that tire size...

Edit: Also to add, I have odd size winter tires for my WRX, I have 195 65R15's. 15's on a WRX?! I downgrade my front brakes to LGT front brakes, from my old car. I had the brackets, rotors, and pads, so I might as well use 'em. The winter tires are slightly different diameter than the summer tires I have on my car, and hence, if I get a flat, I switch over to ALL of my other set of tires until I can get the flat repaired, or a totally new set of tires to replace the useless set. If I have my winter tires on, I put the spare in the front, as I don't want to wreck my viscous limited slip in the rear, but I do have an open front diff. I did the research before I got my tires though, so I knew this before hand.
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Old 10-23-2009, 01:51 AM   #3
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.... how did you do that? (chi_san)
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Old 10-23-2009, 09:49 AM   #4
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.... how did you do that? (chi_san)
Lots, and lots, and lots of research.
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Old 10-23-2009, 10:16 AM   #5
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Not enough research to know that the '08+ WRX has open front and rear diffs.

I did the taller winter tire thing on my 2.5RS. Everything went fine until I bottomed it out going over some large bumps and ripped both my front fender liners out.

elementsk8trbam.. what winter tires did you buy? Tire specs don't always match up with the numbers on the sidewall.. and most manufacturers have specs on each size tire.
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Old 10-23-2009, 10:43 AM   #6
elementsk8trbam
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Hankook Icebears, Just worried about if I will have any serious mechanical problems If I put these bad boys on.
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Old 10-23-2009, 11:44 AM   #7
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As long as all 4 tires are the same, no you should not have any trouble with the tranny/diffs. Still not a great idea though ...
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Old 10-23-2009, 02:11 PM   #8
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Quote:
Originally Posted by Beaverboy View Post
Not enough research to know that the '08+ WRX has open front and rear diffs.
08+ has an open rear diff?!?!?!?! that means that if a tire in the front can spin and a tire in the rear can spin, then it is going NOWHERE!
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Old 10-23-2009, 02:15 PM   #9
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man, that's the worst thing you can do. Wider snow tires = less effectiveness.

If anything, get 205 snows
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Old 10-23-2009, 02:52 PM   #10
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Eck, open diffs. Fantastic, so it's like a 1990's Legacy or Impreza, without traction control.

I'm assuming that there's some kind of TCS on the 2008 WRX then, since open diffs != performance. Since I don't own one, and don't work on them, I really don't care all that much about them, to be honest.
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Old 10-23-2009, 03:04 PM   #11
THEVERGE
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I run that exact same size (except they are all seasons, not snows) on my 02 WRX. I have not run into any fitment/mechanical problems so far.
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Old 10-23-2009, 05:47 PM   #12
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the 08+ cant have open diffs. that would be going backwards...
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Old 10-23-2009, 08:39 PM   #13
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Quote:
Originally Posted by thisisntjared View Post
the 08+ cant have open diffs. that would be going backwards...
If you have an open diff, and one tire does not have grip, if the vehicle has TCS, the ABS will pulse the brakes on the wheel that is spinning, sending power to the opposite tire. That is the same effect as a limited slip, only it's using the brakes instead of a clutch, viscous coupler, or other locker.

This way, when you turn, the open diff has less resistance to the turn than a conventional limited slip, which has to slip, or a straight axle, which has no slip, and will scuff or skip.

This electronic limited slip system is designed to cut down on rolling resistance when low traction situations aren't encountered, as well as make more use of the TCS system.
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