tires

#1 10-17-2002, 01:40 AM

Guys I need a ? answered if anyone can Im getting 19 inch wheels in like a week i was gonna go with 235-35-19's but i was told I can go with 245-35-19's up front and 255-35- 19's in the rear will this work or will they rub. has anyone gone wider than 225's
thanks

Seraph · #2 10-17-2002, 02:49 AM

I am probably wrong but wouldn't the width difference be harmful to the car's internal powertrain parts?

Lwin

Paisan · #3 10-17-2002, 05:40 AM

If it's an AWD you'd be putting extra wear on the system not to mention on AWD cars you should have the same size tires all around. Heck you shouldn't even put the same size in 2 different treads on an AWD car.

-mike

CigarJohnny · #4 10-17-2002, 07:08 AM

While the extra width of a tire will not put stress on any internal parts, it will put lots o f stress on wheel bearings that are already stressed. What will stress it is increased diameter. You would be lowering the gear ratio and making it harder for the car to accelerate.

I've not heard of anyone putting larger than a 17" wheel on an SVX but that doesn't mean it's not impossible. Your main concerns would be wheel offset. Wider rims and tires could rub the frame or suspension at full turn or rub the wheel wells when the suspension is compressed. Not to mention the extra stress on bearings.

A visit to tirerack.com would be your best bet. They list wheels that are known to fit nearly every make or model of car. Personally I'd stick with their recommended wheel choices unless someone posts a reply with a larger wheel that they have successfully used. Just my two cents...
-Johnny

CigarJohnny · #5 10-17-2002, 07:14 AM

Oh yeah...I have to agree with Mike. NEVER mount tires on an AWD (or a 4WD) with different rolling diameters unless you want to tear up your center clutch or start snapping and breaking stuff in your drivetrain.

CigarJohnny · #6 10-17-2002, 07:16 AM

Correction: instead of "rolling diameter", make that "rolling circumferance".

#7 10-17-2002, 07:34 AM

I wonder why they use different width tires/rims on awd Porches,Lamborghini's, and Skylines with out any problems then?

Mr. Pockets · #8 10-17-2002, 08:39 AM

Quote:

Originally posted by RRX
I wonder why they use different width tires/rims on awd Porches,Lamborghini's, and Skylines with out any problems then?

They're probably geared for it.

#9 10-17-2002, 09:26 AM

Quote:

Originally posted by RRX
I wonder why they use different width tires/rims on awd Porches,Lamborghini's, and Skylines with out any problems then?

They're all RWD biased. They accelerate like mad, and have wider tiresin back to improve traction. The SVX is FWD biased I think.

- Ca$h

#10 10-17-2002, 09:27 AM

thanks

Mr. Pockets · #11 10-17-2002, 10:51 AM

Quote:

Originally posted by $VX

They're all RWD biased. They accelerate like mad, and have wider tiresin back to improve traction. The SVX is FWD biased I think.

- Ca$h

I think the point that RRX was making was that some of those cars use larger diameter tires in the rear than in the front. You can't do this on an SVX because the car isn't geared for it - but on those cars, I'm guessing that's how it's handled.

But, yes, the SVX is FWD biased. Normally the torque split is 90% front and 10% rear, but it can be split up to 50/50.

#12 10-17-2002, 01:04 PM

I was figuring that but wasn't sure. Somebody had posted that you cant do that on any AWD car.,and I was thinking thats not true.
Thanks

Andy · #13 10-17-2002, 02:26 PM

Quote:

Originally posted by Mr. Pockets

But, yes, the SVX is FWD biased. Normally the torque split is 90% front and 10% rear, but it can be split up to 50/50.

Unless you are in Europe and I believe a few other places where the bias is RWD

Andy

#14 10-17-2002, 03:23 PM

Does this mean I could find a Euro 5spd and associated parts and convert mine to a RWD biased 5spd.

CJ

Mr. Pockets · #15 10-17-2002, 03:29 PM

Quote:

Originally posted by cjoffe
Does this mean I could find a Euro 5spd and associated parts and convert mine to a RWD biased 5spd.

CJ

I don't see what the point would be. If you convert the SVX to a 5spd, it's going to be 50/50 until you have slippage in the front or the rear. That's a pretty damned good setup. Of course, it's reactive instead of active, but whatever.

I don't know that europe-spec Subaru 5spd transmissions are any different than US-spec jobbers.