Hey guys,

Sorry about not being magna related but I guess this applies to magnas as well, if not any other car with upgraded rims.

Anyway, I fitted my 19s from my magna (235/35/19 tyres) onto my MPS6. I'm aware these exceed the rolling diameter with the current tyres, but given theyre almost brand new I'll cop the fine and put my stockies on. I want to at least get use out of my tyres :)

The problem arouse today when I had passengers in the back. Under load the car would scrub on the drivers side rear. This would also occur on relatively big bumps and pot holes. Without anyone in the back it also scrubs when going up my driveway or steep inclined driveways and ramps.

I've posted this problem on OZMPS and the general consensus is to get the guards rolled. Would this fix the problem? Or would I be better off going for a thinner tyre like a 215/40/19? Hopefully theres an easy fix because the missus suggested going back to my 18s :(

Heres a pic of it scrubbing. When its massively scrubbing its actually slightly damaging the wall of the tyre.
http://img515.imageshack.us/img515/4696/16102010l.jpg (http://img515.imageshack.us/i/16102010l.jpg/)

Cheers in advance

It's almost as if the offset is wrong
I'm not sure what the lip is like on the rear of these cars but you could try rolling the gurad to get abit more clearance, you might gain enough to clear the wheel
How is the wheel sitting in relation to the guard? is the rim inline with the outer guard? I had this problem on my and opted with a thinner tyre (went from 245 to 235) with a slightly rolled guard now tyre tucks under np
Just need to look at the tyre and guard, suss out where its rubbing and what might work

just noticed you had a bigger rolling diameter, this might be a cause too

I'd say that the problem is a result of offset and rolling diameter. I wouldn't be going to a narrower tyre as what's on them look to be slightly undersize anyway?
What's the rim width, i'll try and find what the correct tyre is for that width rim and post back.

From what i can find : 235/35-19 tyre requires a Rim Width Range of 8.0" - 9.5" To go to the narrower tyre of 225/35-19 requires Rim Width Range of 7.5" - 9.0". I couldn't locate rim width requirements for the 215/40/19.

Just looking at the pic above, i'd say that it's your offset that's the major cause of your problems but rolling diameter wouldn't be helping either. Look how close the tyres are to the body, particularly the fwd arches.

Lipping and rolling the guards would help no doubt but perhaps the best result would be to sell the current rims and buy something that's correct for your car?

ie..save the money from lipping/rolling guards + money from sale of rims/tyres = cash to buy appropriate rim/tyre combo.

At least then you know you have the correct and legal set-up for your car and without the clearance issues.

Just an idea/opinion of course so take with a grain of salt...i do like the rims so i understand thedesire to keep them if possible :)

The offset seems OK for the car considering the rims were originally from a Mazda 6 Luxury Sports. Not sure if theres any difference from lux sports to AWD MPS but would assume there isnt. Theyve since been on a CH lancer then I replaced the tyres and threw them on my magna. I'm pretty sure theyre 8" wide from memory. In the inner guard theres a piece that actually goes in for about 1.5 cm and is rather sharp. I'm thinking this bit is doing the rubbing, so maybe if the guy who rolls the guards can flatten it out I might be onto a winner.

Stock tyres are 215/45/18 which is around 650 from memory and the 235/35/19s work out to be 621 so I've actually reduced the rolling diameter yeah?

Cheers for the replies guys :)

EDIT: and yes if I can keep them thatd be awesome :P I love my rims lol

The offset seems OK for the car considering the rims were originally from a Mazda 6 Luxury Sports. Not sure if theres any difference from lux sports to AWD MPS but would assume there isnt. Theyve since been on a CH lancer then I replaced the tyres and threw them on my magna. I'm pretty sure theyre 8" wide from memory. In the inner guard theres a piece that actually goes in for about 1.5 cm and is rather sharp. I'm thinking this bit is doing the rubbing, so maybe if the guy who rolls the guards can flatten it out I might be onto a winner.

Stock tyres are 215/45/18 which is around 650 from memory and the 235/35/19s work out to be 621 so I've actually reduced the rolling diameter yeah?

Cheers for the replies guys :)

EDIT: and yes if I can keep them thatd be awesome :P I love my rims lol

215/45/18 diameter = 650.7mm
235/35/19 diameter = 647.1mm

So your rolling diameter is actually less now. When your speedo says 100km/h you're actually traveling 99.4km/h, BUT, seeing as though your speedo will already read slow (all cars do from factory) When you're doing 100km/h, you're probably more than likely doing around 93km/h.

The sharp bit you speak of sounds exactly like what I had on my car. It was where the quarter panel and door panel met up on mine, but looks different on yours. Stock rims and tyres on mine were 235/45/17 +35 I think, and I went to 245/40/18 +29. They were a massive difference and scraped like hell. I had the guards rolled but that wasn't enough, so I took it back to my panel beater mate, and had him literally pull my guards out with this machine they have which did the trick.

Get your guards rolled first, should only cost you like $50 a side without the need to paint anything. If that doesn't work, see if they can pull the guards out like the guys did with mine.

Sometimes even just trimming the lip underneath is enough to clear the tyres so they don't rub, but you need to be careful doing this as if the tyres do then catch after you've done this, the plastic is generally sharper and can really damage tyres.

Well I took the wheels off today and had a bit of a look and experiment etc

Rims on it were 19x8 and I tried an 18x8 on there as well. Its definitely a factor with regards to the width of the mag.

Anyway, question is, is there anyway to go thinner without throwing my rolling diameter out too much while retaining the current 19s?

Im seriously considering going back down to 18s....

Well I took the wheels off today and had a bit of a look and experiment etc

Rims on it were 19x8 and I tried an 18x8 on there as well. Its definitely a factor with regards to the width of the mag.

Anyway, question is, is there anyway to go thinner without throwing my rolling diameter out too much while retaining the current 19s?

Im seriously considering going back down to 18s....

Huh? Go thinner?

Huh? Go thinner?

+1

can i offer ye a "NO FAT CHIX IN BACKSEAT" sticker? :D

Will rolling the guards do anything.?

Thinner with regards to the tyres, not the rims. Going 215, 225 etc is significantly lower than the stock rolling diameter so while it may fix scrubbing it will be illegal in the eyes of the RTA. The side wall of the tyre is literally hitting the overhanging bit.

Even today, without anyone in the back, while taking corners a bit more spirited it still scrubbed epicly.

I'm seriously considering going 18s even though stock MPS rims are 18s...I just hate their style.

Where is it rubbing? Is it hitting the lip on the guard or somewhere underneath.?

Lip of the guard, but its bloody close to everything else. Its weird - only occurs on the drivers side rear. With the guard, theres a bit that is roughly one inch long that actually bends in towards the wheel. Its scrubbing right on the edge of this.

I'm thinking maybe my wheels are too wide. Theres a guy running 20s without scrubbing, but then again theyre only 7" wide.

Seriously considering some new mags that are either 18x7.5 or 18x7 at leat then they will be legal...but then I'd have to get rid of the 19s and find some 18s that I like :(

Yep if it hitting the guards then roll them. That's how I got the 245/35/20s to fit under my guards. They where hitting the same spot. Rolled them and problem solved. Mine would hit when I gassed it up the street.

When you roll the guards they roll that lip back under so it no longer points straight out towards the tyre. When you roll them up it gives you the clearance you need not to scrub.:)

Yep if it hitting the guards then roll them. That's how I got the 245/35/20s to fit under my guards. They where hitting the same spot. Rolled them and problem solved. Mine would hit when I gassed it up the street.

When you roll the guards they roll that lip back under so it no longer points straight out towards the tyre. When you roll them up it gives you the clearance you need not to scrub.:)

Awesome. Cheers for that! So when you look under there its not really noticible? I'm a little worried if I go to sell it someone may check it out, but then again do you really poke your head up there when looking for a new car? Maybe not lol.

Even though the rolling diameter is going to be off by like 3.6 it shouldnt really matter I guess. I'll just keep my 18s in case :P