17+inch rims people! Spare tire in your trunk?
Thread Starter
Registered User
iTrader: (10)
Joined: Oct 2004
Posts: 453
From: Gilroy & SF
Car Info: 2008 White STi Hatch
Okay... I know it's stupid...I am just wondering who here has a spare tire in the trunk of their car.
Since factory spare won't work with 17+ rims, who has a matching size spare with their rims?
I know some of you are just trying to shave some weight off your car by taking every "unnessary" stuff out of the car, but what are you going to do if you have a flat?
I currently don't have a spare....I am afraid that...one day....I will get a flat tire and stuck in the middle of nowhere at night......
Since factory spare won't work with 17+ rims, who has a matching size spare with their rims?
I know some of you are just trying to shave some weight off your car by taking every "unnessary" stuff out of the car, but what are you going to do if you have a flat?
I currently don't have a spare....I am afraid that...one day....I will get a flat tire and stuck in the middle of nowhere at night......
VIP Member
iTrader: (9)
Joined: Nov 2002
Posts: 3,928
From: ...a craphole in No.County San Diego
Car Info: MMVI AW WRX STI
The factory spare works fine with 17"'s.
I wouldn't leave it on longer than necessary though. I limped to the tire shop on the donut when someone slashed my tire.
I wouldn't leave it on longer than necessary though. I limped to the tire shop on the donut when someone slashed my tire.
As alex said, the STi's spare is a 17 steelie, and ofcourse it fits perfectly in to the spare tire well, i carried that one in my wagon when i went on a roadtrip this past summer.
Thread Starter
Registered User
iTrader: (10)
Joined: Oct 2004
Posts: 453
From: Gilroy & SF
Car Info: 2008 White STi Hatch
Thanks for all the inputs!!
How much is the STi spare? Where do you guys get it?
I think I will probably get one before someone slashed my tire...
How much is the STi spare? Where do you guys get it?
I think I will probably get one before someone slashed my tire...
Registered User
iTrader: (1)
Joined: Nov 2002
Posts: 2,504
From: Leg Humper
Car Info: '03 WRX wagon, faster than walkin'
spare tire size
I wanted a 17" full size spare, but it just doesn't fit in my rear space (wagon). I am very unhappy that a full size spare doesn't fit but it doesn't. I keep meaning to try to fit the older steel wheels from older Impreza in there...that might fit (?).
The small steel spare works fine - I know - but it won't clear some of the big brake kits. What you need to do if you get a flat on a front tire, is move a rear tire to the front and put the steelie on the rear.
You might have a misconception but generally to keep the speedomoter working, the outter tire diameter needs to be the same no matter if you are running 16", 17", 18", 19" or some other size wheel, if you don't keep the outter diameter the same you'll have to do something about the speedomoter and thus the odometer.
Good Luck.
The small steel spare works fine - I know - but it won't clear some of the big brake kits. What you need to do if you get a flat on a front tire, is move a rear tire to the front and put the steelie on the rear.
You might have a misconception but generally to keep the speedomoter working, the outter tire diameter needs to be the same no matter if you are running 16", 17", 18", 19" or some other size wheel, if you don't keep the outter diameter the same you'll have to do something about the speedomoter and thus the odometer.
Good Luck.
Thread Starter
Registered User
iTrader: (10)
Joined: Oct 2004
Posts: 453
From: Gilroy & SF
Car Info: 2008 White STi Hatch
Thanks! AntiochCali!
So it is okay to use a spare with different rim diameter but same tire diameter?
because I heard that using different diameter rims will kill the drivetrain or something... that is why I am asking...
So it is okay to use a spare with different rim diameter but same tire diameter?
because I heard that using different diameter rims will kill the drivetrain or something... that is why I am asking...
Registered User
Joined: Aug 2004
Posts: 113
From: Bay Area
Car Info: 04 WRX Wagon. Magna Flow Muffler, Eibach Prokit Suspension. 17" ROTA SDRs. LIMO TINT.
I have a Wagon with 17's on it. I stopped carrying the donut... and just pray for the roadside asistance to get there before I get murdered
Lastime I got a flat they were there within the hour... not a bad deal
Infact I think it was even a free ride as I remember
Lastime I got a flat they were there within the hour... not a bad deal
Infact I think it was even a free ride as I remember
VIP Member
iTrader: (9)
Joined: Nov 2002
Posts: 3,928
From: ...a craphole in No.County San Diego
Car Info: MMVI AW WRX STI
Different diameter tires will screw the diffs, if you drove on them long enough. There is a minimal difference in circumference (<2% IIRC) between the stock 205/55/16 and 225/45/17 or 215/45/17. But like I said I wouldn't drive very long on it.
im prety sure that as long as you got the right tires on your 17's so that the outer diameter is the same as stock, a spare should work fine. you run into trouble when the spare is smaller than the other tires because one tire will spin faster than the other wreaking havoc on the diff 
if you ahve to buy a spare anyway, you might just look into getting the STi spare.

if you ahve to buy a spare anyway, you might just look into getting the STi spare.
Registered User
iTrader: (1)
Joined: Nov 2002
Posts: 2,504
From: Leg Humper
Car Info: '03 WRX wagon, faster than walkin'
Originally Posted by broom_dude
Thanks! AntiochCali!
So it is okay to use a spare with different rim diameter but same tire diameter?
because I heard that using different diameter rims will kill the drivetrain or something... that is why I am asking...
So it is okay to use a spare with different rim diameter but same tire diameter?
because I heard that using different diameter rims will kill the drivetrain or something... that is why I am asking...
The difference in tire diameter has to be taken by the differentials - but it's no big deal for a short run - I drove back from Sacto to Pittsburg on my small spare. I wouldn't do that long term, but for a few miles, IMHO it's fine.


