Another Tyre Question

[AndyO]

My front tyres need replacing and I’ve been thinking of moving away from run flats.

I currently have Bridgestone Potenza RFTs on all 4. I am thinking of the Eagle F1 Asymmetric 3 NonRFT, but can I leave my rears as they are until they are worn, or is it unwise to mix RFT with nonRFT? Should I bite the bullet and replace the lot?

Also, any recommendations on which repair kit to keep in the boot?

Front 225/35 R19 8.0
Rear 255/30 R19 9.0.

Thanks

 

[Mr Tidy]

I'm about to make that change myself, but will be changing all 4 as I have a different set of wheels! But as I have an E86 I have 225/40 x 18 front and 255/35 x 18 rear Bridgestones.

The general advice on here is that 2 of each isn't great, but if you're not "going for it" every time you go out I would have thought it should be manageable. But that could get tedious if your rears have loads of tread.

But then if they do you might be able to sell them on here to get back some of the cost of replacing all 4 RFTs - just a thought.

From what I have read Holts Tyreweld is the favoured option because it's easier to wash out for a repair - assuming the tyre might be repairable! The cans I saw said they were suitable for up to a 16" wheel so I bought 2 - but they were on special in Tescos for half price! :lol:

But I've also bought a 17" spacesaver, jack and wheelbrace as Plan B.

 

[Busterboo]

Should I bite the bullet and replace the lot?

You won't know how good the car is until you do.
You know runflats + nonrunflats ain't a good compromise. No compromise with tyres ever is.
You're going to spend the money eventually anyway, so you might as well spend it now.

On the 19" wheels you have, tyres with rim protection could be a good idea. Do Eagles have that?

 

[markalp]

My front tyres need replacing and I’ve been thinking of moving away from run flats.

I currently have Bridgestone Potenza RFTs on all 4. I am thinking of the Eagle F1 Asymmetric 3 NonRFT, but can I leave my rears as they are until they are worn, or is it unwise to mix RFT with nonRFT? Should I bite the bullet and replace the lot?

Also, any recommendations on which repair kit to keep in the boot?

Front 225/35 R19 8.0
Rear 255/30 R19 9.0.

Thanks

I wouldnt worry about running none run flats on the front with run flats on the back, normal everyday driving wont be affected.

I keep 2 x https://www.amazon.co.uk/Holts-LOYH...22027243&sr=8-1&keywords=Holts+Tyreweld+500ml in the boot in case of punctures, only ever used it once on an 18" rim and got me off the M1 and into London where I got the puncture repaired properly.

 

[HillWalker]

I'm sure the official line is not to mix runflats with non runflats whilst some do I'm sure the insurance would pick up on it should you have a bump.
I've just ordered Asymmetric 3s to replace my runflats but in sizes 235/35 X 19 and 255/35 x19 to hopefully give a better ride.

 

[Busterboo]

Just going from runflats to proper tyres will give you a better ride.

Changing sizes ain't necessary.

 

[AndyO]

Thanks for all the comments. I think I will just go the whole hog and suck up the payment on my credit card. And will order the Holts Tryeweld.
Any recommendations for fitters? I have the usual nearby; Kwikfit, National Tyres, HiQ, Halfords, and lots of local garages.

 

[HillWalker]

Just going from runflats to proper tyres will give you a better ride.

Changing sizes ain't necessary.

Surely it's got to help, a little bit more sidewall is bound to give a slightly softer ride.

 

[Gaffa22]

One of these would be better than just tyre weld

https://www.ebay.co.uk/i/232484426644?chn=ps&adgroupid=54713418609&rlsatarget=pla-411723801510&abcId=1133926&adtype=pla&merchantid=7397344&poi=&googleloc=9045084&device=c&campaignid=1057752920&crdt=0

 

[AndyO]

One of these would be better than just tyre weld

https://www.ebay.co.uk/i/232484426644?chn=ps&adgroupid=54713418609&rlsatarget=pla-411723801510&abcId=1133926&adtype=pla&merchantid=7397344&poi=&googleloc=9045084&device=c&campaignid=1057752920&crdt=0

Yes thanks, I already have a compressor

 

[Busterboo]

Just going from runflats to proper tyres will give you a better ride.

Changing sizes ain't necessary.

Surely it's got to help, a little bit more sidewall is bound to give a slightly softer ride.

Non-runflats - "proper tyres", in your words - will improve the ride much more than perhaps you realise. Changing other variables - not least sidewalls - isn't necessary or desirable.

For your wheels, buying high quality tyres with some rim protection, however, is.

 

[HillWalker]

Well they are now already ordered and deposit paid in those sizes, I've been deliberating for ages which sizes to go for, don't get me thinking I've made a mistake, and if no other benefit the 255/35x19 are nearly £25 a tyre cheaper than the 255/30x19 so that's a bonus although the fronts are about the same.
Anyone else with opinions on the sizes while I've still got time to change my order, you've got me worried now.

 

[mr wilks]

Well they are now already ordered and deposit paid in those sizes, I've been deliberating for ages which sizes to go for, don't get me thinking I've made a mistake, and if no other benefit the 255/35x19 are nearly £25 a tyre cheaper than the 255/30x19 so that's a bonus although the fronts are about the same.
Anyone else with opinions on the sizes while I've still got time to change my order, you've got me worried now.

You havent made a mistake , somebody else has :wink: i was out in a Audi TTRs on Saturday , very nice powerful sports coupe with factory 19inch alloys on 255 width tyres , guess what :? no sign of a 30 profile & its the same with Mercedes , quite why Bmw undersize their rubber with a 30 profile rear is anyones guess , may be ok on their test tracks with no potholes or kerbs
You will sit back with a wry smirk when the new tyres are on more comfort , more alloy protection , less arch gap & as you point out can even cost less £ , , what's not to like

 

[ihadablackdog]

To hijack the size issue, I have 18" on a 2011 20sdrive with runflats. Reading about changing to non-runflat, but what about sizes? I'm just after a bit of a softer ride if possible....not floaty rolls royce, but not bone shaker either...going over some of the roads it feels like the car is loosing contact with the road for a split second. Not overly mechanically minded either, so it would just be easier if keeping the same sizes (not sure what they are without going and looking), presumably same pressures as well?

 

[mr wilks]

To hijack the size issue, I have 18" on a 2011 20sdrive with runflats. Reading about changing to non-runflat, but what about sizes? I'm just after a bit of a softer ride if possible....not floaty rolls royce, but not bone shaker either...going over some of the roads it feels like the car is loosing contact with the road for a split second. Not overly mechanically minded either, so it would just be easier if keeping the same sizes (not sure what they are without going and looking), presumably same pressures as well?

Same story with 18s , assuming your 18s are factory wheels so 8j front & 8,5j rear i would definitely up the rear to a 245 40 as opposed to 255 35
Front 215 45 or 225 45 , can't think of any reason not to , it even makes the speedo more accurate .
Pressures in of 32-34psi fronts / 34-36psi rears & enjoy the ride

 

[ihadablackdog]

Front 215 45 or 225 45 , can't think of any reason not to , it even makes the speedo more accurate .

Thanks.

Is the speedo being inaccurate a thing? In my X1 that I drove to my job every day since Sep, the journey was 12.4 miles each way. Every time, exactly 12.4 Now, in my Z4 its 12.6 each way!

 

[HillWalker]

Well they are now already ordered and deposit paid in those sizes, I've been deliberating for ages which sizes to go for, don't get me thinking I've made a mistake, and if no other benefit the 255/35x19 are nearly £25 a tyre cheaper than the 255/30x19 so that's a bonus although the fronts are about the same.
Anyone else with opinions on the sizes while I've still got time to change my order, you've got me worried now.

You havent made a mistake , somebody else has :wink: i was out in a Audi TTRs on Saturday , very nice powerful sports coupe with factory 19inch alloys on 255 width tyres , guess what :? no sign of a 30 profile & its the same with Mercedes , quite why Bmw undersize their rubber with a 30 profile rear is anyones guess , may be ok on their test tracks with no potholes or kerbs
You will sit back with a wry smirk when the new tyres are on more comfort , more alloy protection , less arch gap & as you point out can even cost less £ , , what's not to like

Phew, good to know, thanks Mr Wilks.

 

[Busterboo]

Well they are now already ordered and deposit paid in those sizes, I've been deliberating for ages which sizes to go for, don't get me thinking I've made a mistake, and if no other benefit the 255/35x19 are nearly £25 a tyre cheaper than the 255/30x19 so that's a bonus although the fronts are about the same.
Anyone else with opinions on the sizes while I've still got time to change my order, you've got me worried now.

Again ... why introduce additional variables? Particularly when their addition is unnecessary.

Put another way, you're just over-complicating things. Don't bother. Good tyres with standard profiles will serve you very well and not leave you worrying about a decision you didn't need to make.

As for mr wilks' marshmallow pressures, try them and see. They'll probably do no worse than shorten the lives of your new tyres.

 

[AndyO]

Should I bite the bullet and replace the lot?

You won't know how good the car is until you do.
You know runflats + nonrunflats ain't a good compromise. No compromise with tyres ever is.
You're going to spend the money eventually anyway, so you might as well spend it now.

On the 19" wheels you have, tyres with rim protection could be a good idea. Do Eagles have that?

I think the Eagles do have this rim protection. They come with MFS (maximum flange shield) which I think does the job, can anyone confirm?

 

[mr wilks]

Well they are now already ordered and deposit paid in those sizes, I've been deliberating for ages which sizes to go for, don't get me thinking I've made a mistake, and if no other benefit the 255/35x19 are nearly £25 a tyre cheaper than the 255/30x19 so that's a bonus although the fronts are about the same.
Anyone else with opinions on the sizes while I've still got time to change my order, you've got me worried now.

Again ... why introduce additional variables? Particularly when their addition is unnecessary.

Put another way, you're just over-complicating things. Don't bother. Good tyres with standard profiles will serve you very well and not leave you worrying about a decision you didn't need to make.

As for mr wilks' marshmallow pressures, try them and see. They'll probably do no worse than shorten the lives of your new tyres.

You can argue your point forever mate , you only need to scan the whole range of Bmw models recommended tyre pressures , not even a 7 series on 20inch rims gets over 40psi , same with any M models , all " comfortably" under 40psi whether 18inch or 19inch .
For some bizarre reason the only model that breaks that 40psi bsrrier is the E89 , then folks wonder why the rims are forever cracking
eg below for the Z4m , id assume you agree that the M techs know what they're on with when it comes to optimum performance ?
http://www.tyre-pressures.com/bycar/manu_bmw/8654/54309

Now as for your " good standard profiles serving you well " tell us again why you changed from 19s to 18s