[iks-10]

I'm changing my tyres and have noticed increased wear on the outer part of the driver's side front tyre. I assume this is due to positive camber.
I will get an alignment check done but if it is a camber issue, how do I resolve this since I see many people saying that camber can't be adjusted on an f32.
Thanks in advance

[NISFAN]

It shouldn't have positive camber, they have something like 30' (0.5 degree) negative as standard. Maybe not as much a some would like. But it is a fixed value on the front with no camber adjustment available.

Aftermarket options include:

Fitting M4 arms roughly minus 60'

Camber adjustable plates

Off centre bushes

[Sasquartch]

Wear on one edge of the front tyres is usually toe-in - which is the only adjustment available.

[gippy]

Originally Posted by iks-10

I'm changing my tyres and have noticed increased wear on the outer part of the driver's side front tyre. I assume this is due to positive camber.
I will get an alignment check done but if it is a camber issue, how do I resolve this since I see many people saying that camber can't be adjusted on an f32.
Thanks in advance

i recently had my alignment done, here was my before and after, this should help you work out what the values should be

[Eddamoo]

Please could you define how much of the 'outer part' is affected. Also do you run Run Flat tyres?

If its just a few inches of the outer wall, you're likely running your pressures too low. This leads to the tyre running on the sidewall more than the centre tread.

Even with moderate 2-3degree camber, it will not significantly affect tyre wear. Toe on its own will not wear the outer tyre.

[jbiswurm]

The simple answer is to go get an alignment. Suspension geometry is to complicated to just assume 1 parameter is off in a cause and effect type way. Go spend $100 to get the data to make an informed decision. If its a toe issue theyll fix it right there. If data says camber then you have some of the options already listed here.

[iks-10]

Thanks guys. Yeah I guess it's more likely toe in causing the uneven wear. These tyres are run-flats but I've bought MPS4S and just need to get them fitted. I'll get the alignment done professionally after that anyway. The pressures have all been checked regularly and topped up when needed so I don't that that was the issue. Likely just a pothole that knocked the driver's tyre in perhaps.
Thanks

[Sasquartch]

Originally Posted by Eddamoo

Toe on its own will not wear the outer tyre.

It will

[Watsey]

Originally Posted by Eddamoo

Please could you define how much of the 'outer part' is affected. Also do you run Run Flat tyres?

If its just a few inches of the outer wall, you're likely running your pressures too low. This leads to the tyre running on the sidewall more than the centre tread.

Even with moderate 2-3degree camber, it will not significantly affect tyre wear. Toe on its own will not wear the outer tyre.

My car is running -1.75 degrees of camber on the front and I can assure you that it absolutely does affect tyre wear (inner 1/2 of the contact patch). It's one of the trade-offs : reduce understeer versus increased tyre wear.

[Eddamoo]

Originally Posted by Watsey

My car is running -1.75 degrees of camber on the front and I can assure you that it absolutely does affect tyre wear (inner 1/2 of the contact patch). It's one of the trade-offs : reduce understeer versus increased tyre wear.

Well that's odd... How come you're running that much -ve front camber? The wishbone bushes may not be able to cope which could be causing your wear - the unladen wheel could be dragged when cornering. My old Z4 and VX220 ran -2.5Deg (within spec) on the rear and the inners were only ever 0.5mm more worn at changeover time. Certainly not enough to be concerned about and you could visibly see the camber it was so significant.

Either way, everyone on this forum instantly jumps on 'Alignment' when anyone mentions tyre wear without double checking the facts which is frustrating. The OP described 'outer part' which i asked for clarification on.

Go to a BMW used section and just look at the amount of cars with outer tyre wear - most will have it. Shoulder wear on RFTs is caused by low pressures making the tyres wear more on the heavily supported sidewalls. This is why RFT's need more pressure than standard tyres and exhibit this issue with even slight under-pressurisation.

If a car has a geometry that is out enough to cause significant wear, you'd be able to eyeball it by looking down the length of the car - you can easily see 1 degree either way. If you've ruled out pressures and you cant see it, its likely knackered bushes - which will start to become an issue with the aging early F3* models.

[Watsey]

Originally Posted by Eddamoo

Well that's odd... How come you're running that much -ve front camber?

Because my car is running Millway Motorsport camber plates and -1.75 is exactly where I want them set.

[smrtypants44]

Originally Posted by Watsey

My car is running -1.75 degrees of camber on the front and I can assure you that it absolutely does affect tyre wear (inner 1/2 of the contact patch). It's one of the trade-offs : reduce understeer versus increased tyre wear.

Camber doesn't increase tire wear, it just focuses it on less of the tire. If you had 0 camber your tire would be just as worn just evenly across the entire tread.

[Watsey]

Originally Posted by smrtypants44

Camber doesn't increase tire wear, it just focuses it on less of the tire. If you had 0 camber your tire would be just as worn just evenly across the entire tread.

One if you is right, the other is wrong, and they're both the same person.