BMW tyre/wheel choices

I wonder if the new run-flat tyre system found on all new BMW's in the UK market will go the same way as the metric tyres they fitted back in the 90's
Discuss
--
--------------------------------------------------------------------------------------
Jason Russell
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Hmmm. In the U.S., run-flats are only standard on the Z4, 3 and 6 series. They are optional on the 5 series and not available on the 7, X5, or X3 according to http://www.bmwusa.com
Tom
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sat, 19 Nov 2005 17:26:20 -0000, "Dotcom Computers Ltd"

    In a perfect world I'd retrofit them to my 325i and stick with normal tires on my Z4.     I think they're a great idea for commuter cars - I'd certainly prefer the option of never being stuck in rush hour with a flat, or having my girlfriend on some dark road in Chicago winter cold with one.     On performance cars like my Z4 (no, seriously!), I don't think they're ready yet. The ride and handling greatly improve on the Z4 once the run-flats are removed - it's the best modification for the car this side of heated M-sport seats, and lots cheaper. I wish the magazine driving comparisons could be done with the Z4 on good sports tires - it'd fare a LOT better.     epbrown -- 2003 BMW 325i Black/Black 2003 BMW Z4 Black/Black
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
In wrote:

Here in the UK, to my knowledge the new 3, 5 and 6 have them (not M models).
I did wonder how easy it is to cahnge them to normal rims and tyres given the comuter warnig interface etc
What was interesting, is that the 5 was designed using 'normal' tyres, cos all the reviews I read critised the run flats, whereas the 3 was designed with runflats as standard.
I guess the other 'advantage' is that no spare, so hence no sapce impact!
--
--------------------------------------------------------------------------------------
Jason Russell
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
This months BMW magazine (UK) had a short article on run flat tyres. BMW did experiments on the 5 series with and without run flats with a blow out at motorway/freeway speeds (70mph?). With regular tyres the car would spin out of control, with run flats, a warning light comes on the dash to tell you a tyre is under pressure, you slow down to 50mph and drive to a garage for repairs. The new E90/E91 3 series has run flats by design. The grip and handling is outstanding and the ride comfortable though firm. We will never know what this 3 series would be like with regular tyres. Adrian
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

I suspect some E90 drivers will ultimately replace their run-flats with conventional tires which can be mounted on the same rims. Then, we'll know!
Reports from the Z4 owners who have substituted Goodyear Eagle F1 Ds-D3 (non run-flats) for the OEM Bridgestones indicate improved ride, wear and handling.
Tom
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.