[MO_1]

I have recently purchased a full set of brand new tyres for my car. I only had the rear two put on as the fronts did not need putting on.

I have noticed the old tyres have got a rubber rim which sticks out slightly to protect the alloys, The new tyres do not have these. Only difference in the new and old tyres is the new ones are the extra load tyres. Everything else is the same.

I would have liked the rim on the new ones to protect my alloys, Anyone else have these on their tyres?

[E902717]

The extra load tyres and the RFT are different, did you want RFT on the car? The extra load Ps2's will go down like a normal tyre when they get a puncture.

[MO_1]

Originally Posted by E902717

The extra load tyres and the RFT are different, did you want RFT on the car? The extra load Ps2's will go down like a normal tyre when they get a puncture.

I dont think you quite understand what i am trying to say. My previous tyres were non runflats and so are the new ones.

I am refering to a rim around the outside of the tyre to protect your alloys.

[E902717]

Oh ok i get you, i thought they had put the wrong tyres on! Have you tried the Michelin website?

[dxb335d]

oops

[dxb335d]

All E9X need Extra Load.

[MO_1]

They do not all need Extra Load

The normal for 18s is 88 and 90. Extra load is 92 and 94 which is what i have on mine

[dxb335d]

Mate, The E9X is heavy... if you have been supplied Non extra Load before you have been supplied wrong.

Ring BMW and ask.

[jw2000]

Originally Posted by dxb335d

Mate, The E9X is heavy... .

So that why they are slow?

[dxb335d]

Originally Posted by jw2000

So that why they are slow?

Mine aint, yours might be...

[MO_1]

Originally Posted by dxb335d

Mate, The E9X is heavy... if you have been supplied Non extra Load before you have been supplied wrong.

Ring BMW and ask.

BMW recommended tyres

Certain makes of tyre are recommended by BMW for each tyre size. They are marked with a clearly visible BMW designation star '*' on the sidewall of the tyre.




When properly used, these tyres meet the highest standards in terms of safety and handling characteristics. BMW only recommends the fitment of approved wheel and tyre combinations, as non-approved wheels or tyres may make contact with the vehicle body due to impermissible tolerances, even though they are the same size. For further details on approved wheel and tyre combinations, please contact your local BMW Dealer.

Extract from BMW website, my old tyres that are NOT extra load have this star.

Link to the full article if anyone would like to read it

http://www.bmw.co.uk/bmwuk/owner/ser...,00.html?cnr=3

[kend]

Look at the plate on the B pillar for 18" load index is 88 front and 90 rear nowhere is XL mentioned.
AFAIK XL means reinforced sidewalls so if you have non run flats with XL load index, they will probably have similar characteristics to run flats.

[doughboy]

Originally Posted by dxb335d

Mate, The E9X is heavy... if you have been supplied Non extra Load before you have been supplied wrong.

Ring BMW and ask.

Sorry dude, think you're mistaken on this one.

No where is XL mentioned in the handbook. Neither of my E9x (even heavy tourer) have had extra load tyres from new.

OP:

E902717 is CORRECT - according to Michelin product guide, PS2's (225/40/18 & 255/35/18 anyway) are NOT available in RFT at XL rating???

Are you sure you have PS2 XL RFT???

In fact, looking at a tyre selector website, no runflats whatsoever are available at XL rating?

[dxb335d]

Ok maybe i am wrong, ive only ever, and will only ever run extra load myself.

[doughboy]

Originally Posted by dxb335d

Ok maybe i am wrong, ive only ever, and will only ever run extra load myself.

Are you sure you can get RFTs in XL, that was my point to the OP? (i recall you use non rft's anyhow dxb)


You need to use higher pressures too to get the extra kg load rating from an XL tyre.

An XL run at standard pressures actually has a lower load rating than the standard tyre run at standard pressures.

[ed335d]

The op says he had non-RFT's and still has non-RFT's

I got some rim protectors with the tyre set I just purchased - went from 255 to 265's!

[dxb335d]

Originally Posted by doughboy

Are you sure you can get RFTs in XL, that was my point to the OP? (i recall you use non rft's anyhow dxb)


You need to use higher pressures too to get the extra kg load rating from an XL tyre.

An XL run at standard pressures actually has a lower load rating than the standard tyre run at standard pressures.

Yes i run Non runflats, Runflats are extra load anyhow.

I run higher pressures yes.

[E92Fan]

Originally Posted by doughboy

Sorry dude, think you're mistaken on this one.

No where is XL mentioned in the handbook. Neither of my E9x (even heavy tourer) have had extra load tyres from new.

OP:

E902717 is CORRECT - according to Michelin product guide, PS2's (225/40/18 & 255/35/18 anyway) are NOT available in RFT at XL rating???

Are you sure you have PS2 XL RFT???

In fact, looking at a tyre selector website, no runflats whatsoever are available at XL rating?

Originally Posted by dxb335d

Ok maybe i am wrong, ive only ever, and will only ever run extra load myself.

The XL marker is actually a bit of a misnomer, and should be disregarded, as it isn't comparable across brands. An XL for Michelin might be a normal for Continentlal, and vice versa.

What you need to look at is the load rating itself. The 255/35/18 RFT (ZP) tyre has a load/speed rating of 90W, using a reinforced sidewall, and this is the minimum load-rating recommended by BMW. It has a maximum load capacity of 1323lbs @ 50psi.

In comparison, the 255/35/18 Non-RFT has a load/speed rating of 94Y (hence why it is designated XL). However, it has a softer sidewall than the ZP tyre, so some might argue the load rating goes up to compensate. In any case, the load capacity is 1477lbs @ 50psi.

As long as you meet the minimum load requirements that BMW state, then you will have no issues with your tyres. As an example the PS2s in 235/35/19 size have two options - regular, and XL. The regular tyre is rated at 88Y, whilst the XL is 91Y. For BMW applications in this scenario, you MUST use the XL-rated 91Y tyre, as the 88Y has too low a loading capacity.

The PS2s on my car are all designated XL - 91Y/93Y front/rear respectively.

[doughboy]

Originally Posted by dxb335d

Yes i run Non runflats, Runflats are extra load anyhow.

I don't think Runflats are automatically higher load rated?

The load rating is given by the rating number i.e. 255/35R18 '90' W. Both non RFT and RFT PS2s in this size, for example, have the same load rating of '90'

The 'XL' version at this size (non RFT) has a load rating of '94'

Still keen to know if the OP has actually got RFT XL's!!

[doughboy]

Originally Posted by kend

Look at the plate on the B pillar for 18" load index is 88 front and 90 rear nowhere is XL mentioned.
AFAIK XL means reinforced sidewalls so if you have non run flats with XL load index, they will probably have similar characteristics to run flats.

Only runflats are designed to be run whilst flat, in conjunction with rft wheel rims and a TPMS

XL tires will not do this.