2010 2011 BMW 5 Series Forum F10
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
 

2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums Regional Forums UK 'Definitive' Winter Tyre Info F10/F11 (with no changing wheels)
Post Reply
 
Thread Tools Search this Thread
      11-30-2012, 03:13 AM   #45
HighlandPete
Lieutenant General
6654
Rep
15,858
Posts

Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

iTrader: (0)

Quote:
Originally Posted by Mixter View Post
Reading this makes me think I need to get some this year then as opposed to leaving the car on the drive for 2 weeks. I have never been convinced they make they much of a difference but you lot are convincing me otherwise!
Think in terms of cold weather as well. I'm off out in a few minutes, road is damp but under freezing point at present, so there will be ice pockets. Much greater safety factor for stopping and controlling the car.

As a side note the winter run-flats are softer than the summer tyres at colder temperatures so a better ride as well. I run 18" wheels in the summer, 17" in the winter.

HighlandPete
Appreciate 0
      11-30-2012, 03:18 AM   #46
rich1068
has left the building
United Kingdom
89
Rep
3,359
Posts

Drives: F30 330d M Sport
Join Date: Oct 2010
Location: UK

iTrader: (0)

Not often on here because err... I haven't got a 5er.

But keeping in mind the title of this thread particularly "(with no changing wheels)"...

Quote:
Originally Posted by remmib View Post
My concern is the tyres that you have to put on an off the wheels two times a year, but sure if they can be damaged.
On my E91 running 18s I fully intended to just have the tyres swapped and use the same wheels. I got hold hold of some Contis and had the summer run flats taken off in November 2011. However, when I returned in the new year to have the run flats put back on the fitter warned me that the machines can cause considerable damage to the runflat sidewall. Run flats are just not designed to be taken off, put back on, taken off etc etc.

He had no motive for telling me this other than being helpful and I also heard this from another fitter at another tyre outlet.
Appreciate 0
      11-30-2012, 03:46 AM   #47
Mixter
Registered
Mixter's Avatar
United Kingdom
1
Rep
4
Posts

Drives: F10 530D
Join Date: Jul 2011
Location: Beds UK

iTrader: (0)

Interestingly that was going to be my next question - is there a possibility of tyre damage on removal?
Appreciate 0
      11-30-2012, 03:57 AM   #48
rich1068
has left the building
United Kingdom
89
Rep
3,359
Posts

Drives: F30 330d M Sport
Join Date: Oct 2010
Location: UK

iTrader: (0)

I'm no expert on tyre construction but from what I understood the inside of the stiffened sidewall can be gouged by the machine as the tyre is removed. Normal tyres give but run flats don't.

It makes sense as the official line on run flats is that if it's punctured you get to where you need to be and then throw it away.
Appreciate 0
      11-30-2012, 06:21 AM   #49
HighlandPete
Lieutenant General
6654
Rep
15,858
Posts

Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

iTrader: (0)

Quote:
Originally Posted by rich1068 View Post
...However, when I returned in the new year to have the run flats put back on the fitter warned me that the machines can cause considerable damage to the runflat sidewall. Run flats are just not designed to be taken off, put back on, taken off etc etc.

He had no motive for telling me this other than being helpful and I also heard this from another fitter at another tyre outlet.
That is the issue, echoed by many tire shops.

It is a pretty brutal procedure, even with the correct equipment and training. The problem, like running on the tires when flat, and getting a repair, you can't necessarily see the damage. Removal and remounting could do damage and you won't know if the structure has been compromised. The risk factor is increased for future tire failure.

I'd certainly not be tempted to remount run-flat tires on a seasonal basis.

I wouldn't even do it with normal tires, let alone with run-flats. Plus with dedicated wheels you have the chance to have a decent summer wheel set and an appropriate wheel set for winter driving. For example, a smaller winter rim allows a higher aspect ratio and a narrow tire section for optimum winter performance.

HighlandPete
Appreciate 0
      11-30-2012, 11:16 AM   #50
73henny
Lieutenant Colonel
73henny's Avatar
Scotland
500
Rep
1,580
Posts

Drives: a lovely new G20 320dx
Join Date: Nov 2012
Location: Scotland

iTrader: (0)

Quote:
Originally Posted by HighlandPete View Post
That is the issue, echoed by many tire shops.

It is a pretty brutal procedure, even with the correct equipment and training. The problem, like running on the tires when flat, and getting a repair, you can't necessarily see the damage. Removal and remounting could do damage and you won't know if the structure has been compromised. The risk factor is increased for future tire failure.

I'd certainly not be tempted to remount run-flat tires on a seasonal basis.

I wouldn't even do it with normal tires, let alone with run-flats. Plus with dedicated wheels you have the chance to have a decent summer wheel set and an appropriate wheel set for winter driving. For example, a smaller winter rim allows a higher aspect ratio and a narrow tire section for optimum winter performance.

HighlandPete
Must admit, I don't really get this changing wheels to a smaller winter set up. We spec the cars with the wheels we want, so why for 25% of the year would you want smaller rims that don't look as good?
Appreciate 0
      11-30-2012, 12:09 PM   #51
HighlandPete
Lieutenant General
6654
Rep
15,858
Posts

Drives: BMW F11 535i Touring
Join Date: Mar 2007
Location: Scotland, Highland Region

iTrader: (0)

Quote:
Originally Posted by 73henny View Post
Must admit, I don't really get this changing wheels to a smaller winter set up. We spec the cars with the wheels we want, so why for 25% of the year would you want smaller rims that don't look as good?
I come from the 'form over fashion' side of wheel choice. I don't choose to compromise ride and handling, on our typical UK roads, to have fashionable over-sized rims.

It is a big subject and often debated. Autocar posted a blog after Steve Sutcliffe found a BMW 1M coupe worked far better on 18" wheels, rather than the 19" from BMW, to see where users put their priorities. Fashion, even with driving compromises, appeared to come first, rather than driving performance. Many willingly endure a worse handling car with poor ride quality just to have a look.

I don't personally don't get how users will rather have a look, than optimum tyre performance and the highest degree of safety in all conditions. Perhaps I'm from a dying breed.... maybe.

I know there are quite a few motoring journalists/writers who think wheel sizing is getting out of hand, right across the motoring industry, for many reasons. Includes costs, ride, noise, poor chassis dynamics, and it is time to get back to the basics of what wheels and suspension are supposed to do.

HighlandPete
Appreciate 0
      02-24-2014, 03:13 PM   #52
oop north
Private First Class
9
Rep
125
Posts

Drives: Subaru Outback 3.0R
Join Date: Nov 2012
Location: Lancashire

iTrader: (0)

Quote:
Originally Posted by HighlandPete View Post
I come from the 'form over fashion' side of wheel choice. I don't choose to compromise ride and handling, on our typical UK roads, to have fashionable over-sized rims.

It is a big subject and often debated. Autocar posted a blog after Steve Sutcliffe found a BMW 1M coupe worked far better on 18" wheels, rather than the 19" from BMW, to see where users put their priorities. Fashion, even with driving compromises, appeared to come first, rather than driving performance. Many willingly endure a worse handling car with poor ride quality just to have a look.

I don't personally don't get how users will rather have a look, than optimum tyre performance and the highest degree of safety in all conditions. Perhaps I'm from a dying breed.... maybe.

I know there are quite a few motoring journalists/writers who think wheel sizing is getting out of hand, right across the motoring industry, for many reasons. Includes costs, ride, noise, poor chassis dynamics, and it is time to get back to the basics of what wheels and suspension are supposed to do.

HighlandPete
I'm with Pete, so maybe he's just the penultimate of a dying breed!
Appreciate 0
      03-08-2014, 04:59 PM   #53
theig
New Member
0
Rep
7
Posts

Drives: F10 528i
Join Date: Jan 2013
Location: UK

iTrader: (0)

I chose 17" rims in the hope of improved ride quality. Sadly, I have to report that the ride in the back of my 528 F10 is utterly dreadful, it feels like your backside is on the tarmac, crunching into every bump, never mind potholes.

Ride is slightly better on non-rft winters but not much.

BMW may have heard of springs and shock absorbers but have seemingly decided they're not required.

Jaguar do ride comfort much better without sacrificing road holding, but I will never buy one their cars again, but that's another story.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:26 AM.




5post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST