M340i

[rix]

therams said:

Mine came with PS4’s. New car, arrived Dec 2022

Non run-flats? That's not an option on the sheet as far as I know? Any inflator kit too?

[westtra]

bad company said:

Mine needed changing at 16,500 miles, I changed like for like. Apart from poor wear what don’t you like about them?

Just feel like they have minimal grip in any condition.

The amount of times going slow on roundabouts and the car feels like it wants to understeer the. Squirms with the slightest of throttles when the road is wet is ridiculous. In the dry coming up out of my town is a little twisty and just doesn’t feel like i could push it like previous cars.

[JNW1]

westtra said:

bad company said:

Mine needed changing at 16,500 miles, I changed like for like. Apart from poor wear what don’t you like about them?

Just feel like they have minimal grip in any condition.

The amount of times going slow on roundabouts and the car feels like it wants to understeer the. Squirms with the slightest of throttles when the road is wet is ridiculous. In the dry coming up out of my town is a little twisty and just doesn’t feel like i could push it like previous cars.

My F31 335d came on Bridgestone run-flats and I didn't really like them; the wear wasn't bad (over 20k miles for the set) but for me the big drawback was the level of road noise - admittedly that was a weak point on the F31 anyway but it was definitely worse with the Bridgestones IMO. I swapped to non run-flat Goodyear AS 2's - which improved things significantly - and I think there might be a run-flat version of those for anyone wanting the additional piece of mind of not being stranded by a puncture.

However, come replacement time I'll be going the conventional tyre route again and ditching the run-flats; mine came with Pirellis - which are actually quite decent - but I still think there are better non run-flats out there that probably cost less as well. Still got a few thousand miles to go before they'll need changing but when the time comes I'll be having a look at the Tyre Reviews website to see what they're recommending for 19" wheels. I might even be tempted to a set of CrossClimate 2's as I think they're now available in the correct sizes to fit the M340i...

[westtra]

JNW1 said:

My F31 335d came on Bridgestone run-flats and I didn't really like them; the wear wasn't bad (over 20k miles for the set) but for me the big drawback was the level of road noise - admittedly that was a weak point on the F31 anyway but it was definitely worse with the Bridgestones IMO. I swapped to non run-flat Goodyear AS 2's - which improved things significantly - and I think there might be a run-flat version of those for anyone wanting the additional piece of mind of not being stranded by a puncture.

However, come replacement time I'll be going the conventional tyre route again and ditching the run-flats; mine came with Pirellis - which are actually quite decent - but I still think there are better non run-flats out there that probably cost less as well. Still got a few thousand miles to go before they'll need changing but when the time comes I'll be having a look at the Tyre Reviews website to see what they're recommending for 19" wheels. I might even be tempted to a set of CrossClimate 2's as I think they're now available in the correct sizes to fit the M340i...

I plan on non run flat eagle f1’s or pilot sport 4’s when the time comes to change. Will stick a can of tyre weld in the boot beside the air compressor already there. Plus have breakdown cover if all else fails.

[JNW1]

westtra said:

JNW1 said:

My F31 335d came on Bridgestone run-flats and I didn't really like them; the wear wasn't bad (over 20k miles for the set) but for me the big drawback was the level of road noise - admittedly that was a weak point on the F31 anyway but it was definitely worse with the Bridgestones IMO. I swapped to non run-flat Goodyear AS 2's - which improved things significantly - and I think there might be a run-flat version of those for anyone wanting the additional piece of mind of not being stranded by a puncture.

However, come replacement time I'll be going the conventional tyre route again and ditching the run-flats; mine came with Pirellis - which are actually quite decent - but I still think there are better non run-flats out there that probably cost less as well. Still got a few thousand miles to go before they'll need changing but when the time comes I'll be having a look at the Tyre Reviews website to see what they're recommending for 19" wheels. I might even be tempted to a set of CrossClimate 2's as I think they're now available in the correct sizes to fit the M340i...

I plan on non run flat eagle f1’s or pilot sport 4’s when the time comes to change. Will stick a can of tyre weld in the boot beside the air compressor already there. Plus have breakdown cover if all else fails.

Both very good tyres - based on the test below the Continental SportContact 7 might be worth adding to the list of potentials as well:

https://www.tyrereviews.com/Article/2022-Tyre-Revi...

[JackReacher]

The Goodyear F1 runflats on mine have been pretty decent, and loads of tread remaining at 11k miles. I'll replace with PS4 when the time comes.

[Pica-Pica]

JackReacher said:

The Goodyear F1 runflats on mine have been pretty decent, and loads of tread remaining at 11k miles. I'll replace with PS4 when the time comes.

I have 18” Goodyear EfficientGrip on my F30 335d, swapped from 19” Pirelli P zeros. Both runflats.
The 18” Goodyears are pretty decent, and I feel no urge to go away from runflats. 15k miles in, I am probably half-way through their life, assuming I change at about 2.5 to 3mm depth.

[Pica-Pica]

JackReacher said:

The Goodyear F1 runflats on mine have been pretty decent, and loads of tread remaining at 11k miles. I'll replace with PS4 when the time comes.

I have 18” Goodyear EfficientGrip on my F30 335d, swapped from 19” Pirelli P zeros. Both runflats.
The 18” Goodyears are pretty decent, and I feel no urge to go away from runflats. 15k miles in, I am probably half-way through their life, assuming I change at about 2.5 to 3mm depth.

[JNW1]

Pica-Pica said:

JackReacher said:

The Goodyear F1 runflats on mine have been pretty decent, and loads of tread remaining at 11k miles. I'll replace with PS4 when the time comes.

I have 18” Goodyear EfficientGrip on my F30 335d, swapped from 19” Pirelli P zeros. Both runflats.
The 18” Goodyears are pretty decent, and I feel no urge to go away from runflats. 15k miles in, I am probably half-way through their life, assuming I change at about 2.5 to 3mm depth.

I think run-flats have improved significantly since BMW first started to fit them when the E9X 3-series was introduced. I'm still not convinced they're quite as good as the best of the conventional tyres but if you're concerned about the potential consequences of a puncture there are now some perfectly decent run-flats around IMO.

I've been in no rush to get rid of the Pirellis that came with mine as they've performed pretty well in all conditions; by the sounds of it I tend to change at a similar time to you and, while I won't get 30k miles out of the set, I'll certainly get comfortably over 20k from them.

[paulwirral]

JNW1 said:

I think run-flats have improved significantly since BMW first started to fit them when the E9X 3-series was introduced. I'm still not convinced they're quite as good as the best of the conventional tyres but if you're concerned about the potential consequences of a puncture there are now some perfectly decent run-flats around IMO.

I've been in no rush to get rid of the Pirellis that came with mine as they've performed pretty well in all conditions; by the sounds of it I tend to change at a similar time to you and, while I won't get 30k miles out of the set, I'll certainly get comfortably over 20k from them.

I’ve got Pirelli run flats on my 340 ,it came with them when I bought it in 2016 and I’ve seen no reason to deviate from them . They’re not as good as a normal tyre would be but they’re a world away from the Bridgestones that were on a couple of z4s I’ve owned .

[JackReacher]

Just to add to my comment that I find the Eagle F1 runflats good, they do have a tendancy to slip slightly more on wet/cold roundabouts than previous cars on traditional performance tyres, putting the car into understeer. Think someone made a similar comment in relation to other runflats. I am sure PS4s tyres would improve that, but otherwise I am happy to keep the F1s for now. But as a family car I rarely get to push it, and knowing I am less likely to get stranded with a puncture is comforting.

[williamp]

Interesting thread. After reading this I checked mine and the rears (bridgestone) were just above the wear bar. This after 12k miles. I have some big drives coming up so having the tyres chnaged this week.

Both rears to michelin ps5. Will pick up an inflation can from halfords and carry this with me

[MrCD]

I've just ordered for fitment Saturday a pair of Continental Sport Contact 7 for the rears which are needing replaced.

They'll replace ps4s which I've had on for past 16k ish miles. Fronts still OK so will keep them as is and put the Continental when needing replaced.

Went back and forth on whether to stick with ps4s but this swayed my decision with the C7 out performing all other premium tyres https://youtu.be/t10y-87oiD4 and as it happens saved circa £100 per tyre!

[JNW1]

williamp said:

Interesting thread. After reading this I checked mine and the rears (bridgestone) were just above the wear bar. This after 12k miles. I have some big drives coming up so having the tyres chnaged this week.

Both rears to michelin ps5. Will pick up an inflation can from halfords and carry this with me

Apologies if I'm misunderstanding but will this leave you with a pair of brand new conventional PS5's on the rear and a pair of part-worn Bridgestone run-flats on the front? If so personally I wouldn't go that route - I certainly wouldn't mix run-flats and conventional tyres and different makes of tyre front and rear have been known to upset the handling on at least some BMW's. Also, if your car's an M340i you need to be a little bit careful about mixing new tyres on one axle with part worn ones on another.

[JNW1]

MrCD said:

I've just ordered for fitment Saturday a pair of Continental Sport Contact 7 for the rears which are needing replaced.

They'll replace ps4s which I've had on for past 16k ish miles. Fronts still OK so will keep them as is and put the Continental when needing replaced.

Went back and forth on whether to stick with ps4s but this swayed my decision with the C7 out performing all other premium tyres https://youtu.be/t10y-87oiD4 and as it happens saved circa £100 per tyre!

As I've just said to williamp, I'd counsel caution about mixing brand new tyres on one axle with part worn ones on the other if your car's X-drive. And, notwithstanding the PS4 and Contact 7 are both excellent tyres, I wouldn't be terribly keen on mixing them either; perhaps over fussy on my part but personally I prefer to have the same make and model of tyre front and rear.

[williamp]

Yes that was my plan. Your response is worrying- what are the risks?

If I had a puncture I wouldnt change all 4 tyres, so i would have one different. Why not two different??

A serious question.

[HM-2]

IIRC the manual indicates that all tyres should be within 2mm of each other in tread depth on xDrive cars

Edited by HM-2 on Wednesday 1st February 07:56

[ClubsportStr]

williamp said:

Yes that was my plan. Your response is worrying- what are the risks?

If I had a puncture I wouldnt change all 4 tyres, so i would have one different. Why not two different??

A serious question.

Loads of threads on here , re mixing tyres and rolling circumference being different can damage x Drive transmission, and bmw won’t cover under warranty.

Costco tyres won’t change only 2 tyres on xdrive BMWs if there is more than 2mm difference in tread depth front to back .

BMW don’t tell you this when you are buying them, can double the cost of tyre purchases.

[JNW1]

williamp said:

Yes that was my plan. Your response is worrying- what are the risks?

If I had a puncture I wouldnt change all 4 tyres, so i would have one different. Why not two different??

A serious question.

These are just my opinions - and doesn't necessarily make me right and you wrong - but here goes:

Firstly, I wouldn't be keen on mixing run-flats on one axle with conventional tyres on the other. I'm not saying it would be dangerous but the construction of the tyres are different and therefore I'd have thought it's quite possible you could compromise the handling by mixing the two. I wouldn't say it's as extreme as (say) having winter tyres on one axle and summer tyres on the other but in principle it's similar and something I just wouldn't do.

Secondly, even if all four tyres were either run-flat or conventional, personally I'm not keen on mixing make and/or models of tyre (and again that's because it potentially introduces variability into the how the car drives). That probably sounds a bit fussy as I know there are loads of cars driving around with different makes and models of tyre front to rear (and sometimes even across the same axle). However, a number of years ago a colleague at work bought an E46 325i from an independent dealer and was immediately complaining about the unpredictable handling and the tendency of the traction control and Dynamic Stability Control systems to be working overtime. The independent couldn't work out what was wrong so my colleague ended-up taking it to the main dealer who immediately identified the tyres as the problem; all four were well above the legal minimum - and premium brands - but the pair at the front were different from those on the back and the main dealer said that was enough to upset the handling. A number of us (me included!) thought what a load of rubbish but with nothing else left to try my colleague changed the fronts to the same make and model as the rears and the problem disappeared. So the lesson I took away from that is stick to the same make and model of tyre on all four wheels wherever possible!

Finally, specifically in relation to X-drive, there's a view that it's unwise to mix part worn tyres on one axle with brand new ones on the other because it can affect rolling circumference front to rear and thereby place additional strain on the transfer box. I do wonder if this is sometimes a bit overblown but if you've got a difference of (say) 4mm in tread depth between new tyres on the rear and worn tyres on the front I suppose it will affect the difference in rolling circumferences which the transfer box has to deal with; whether it's by enough to cause a problem with the X-drive system I'm not sure but it's a situation I'd probably avoid (and certainly if I was looking to keep the car long-term).

And I suppose what makes me nervous about what you're proposing is you're not doing just one of the things above, you're doing all three; mixing run-flats with conventional tyres, mixing different makes and model of tyre front to rear and mixing new with part worn tyres on an X-drive car. So for me it feels like a massive no-no but, like I say, all of the above is just my opinion which doesn't necessarily make me right!

Edited by JNW1 on Wednesday 1st February 14:44

[williamp]

Very thoughtful answeds, thank you everyone!

Order for 2 tyres cancelled. 4 linglong ditchfinder XL here we come !! (Joking, honest)