[liljestig]

Hi all,
Does anyone have staggered 19-inch wheels on their X3/iX3?
Considering 19x9 ET28 265/50 front, and 19x10 ET40 295/45 rear.

G08 BMW iX3 M-Sport Impressive Piedmont Red Metallic on order

[GDEvans]

Originally Posted by liljestig

Hi all,
Does anyone have staggered 19-inch wheels on their X3/iX3?
Considering 19x9 ET28 265/50 front, and 19x10 ET40 295/45 rear.

G08 BMW iX3 M-Sport Impressive Piemont Red Metallic on order

I'm not sure what you mean by "staggered" wheels. Is this the use of different widths front and rear? This is what the Premier Edition Pro (pre-LCI) came with - Front 245/45R20 and Rear 275/40R20. Being rear wheel drive, the tail can be excitable in the wet, so definitely pleased to have the wider tyres on the back.

The problem I can see with the sizes you quoted is they have a different radius to the stock wheels. And hence your speedometer will read incorrectly. Also, the max tyre width for a 10" wheel is 285mm; you should really be looking at an 11" wheel for that tyre. The bulging tyres may look cool on a Citroen Saxo, but I'm not sure about the safety of a 2.25 tonne SUV with a torquey engine.

According to the BMW website, they specify 245/50R19 front and rear on the M Sport. I'm not sure whether this is correct - the same page also says that the M Sport Pro has 19" wheels, but it actually has 20" wheels. These tyres have a radius of 726mm, and a 122mm sidewall. This is a match for my tyres - 728mm.

The tyres you specified have a radius of 747mm and a sidewall 132mm. This will give a 3% error on the speedo. Also, most people try to go for a lower sidewall, to give a more low profile look to the tyre. Going for a higher profile tyre seems strange.

Would it not make more sense to go with 265/45R19 and 295/40R19, which are a much closer match to the original tyre diameter?

Personally if I was going to the huge expense of new wheels and tyres, I would go for a 20" rim. Stick with the 245/45R20 on the front - no real benefit of going wider there. And go for an equivalent diameter on the rear - maybe the 285/40R20 or 305/35R20. Although these are less common tyre sizes, and may be special order. The 275/40R20 seems to work pretty well, and is a very common tyre size.

[the_ape]

Prem pro at least on the 20's aren't staggered.

[liljestig]

Originally Posted by GDEvans

I'm not sure what you mean by "staggered" wheels. Is this the use of different widths front and rear? This is what the Premier Edition Pro (pre-LCI) came with - Front 245/45R20 and Rear 275/40R20. Being rear wheel drive, the tail can be excitable in the wet, so definitely pleased to have the wider tyres on the back.

The problem I can see with the sizes you quoted is they have a different radius to the stock wheels. And hence your speedometer will read incorrectly.

Also, the max tyre width for a 10" wheel is 285mm; you should really be looking at an 11" wheel for that tyre. The bulging tyres may look cool on a Citroen Saxo, but I'm not sure about the safety of a 2.25 tonne SUV with a torquey engine.

According to the BMW website, they specify 245/50R19 front and rear on the M Sport. I'm not sure whether this is correct - the same page also says that the M Sport Pro has 19" wheels, but it actually has 20" wheels. These tyres have a radius of 726mm, and a 122mm sidewall. This is a match for my tyres - 728mm.

The tyres you specified have a radius of 747mm and a sidewall 132mm. This will give a 3% error on the speedo. Also, most people try to go for a lower sidewall, to give a more low profile look to the tyre. Going for a higher profile tyre seems strange.

Would it not make more sense to go with 265/45R19 and 295/40R19, which are a much closer match to the original tyre diameter?

Personally if I was going to the huge expense of new wheels and tyres, I would go for a 20" rim. Stick with the 245/45R20 on the front - no real benefit of going wider there. And go for an equivalent diameter on the rear - maybe the 285/40R20 or 305/35R20. Although these are less common tyre sizes, and may be special order. The 275/40R20 seems to work pretty well, and is a very common tyre size.

The reason why I am considering tires with taller sidewalls, is because where I go, the roads are often hopelessly ridden with bad potholes - having had my current car flatbed to the tire shop several times. Also, it seems that the G01/08's speedometer is showing approximately 3% higher speed by default, thinking installing slightly larger tires would fix that.

• 45/40 profile:
  • Michelin Pilot Sport 4 - 265/45R19
    Michelin Pilot Sport 4 - 295/40R19
  50/45 profile:
  • Michelin Pilot Sport 4 SUV - 265/50R19
    Michelin Pilot Sport 4 SUV - 295/45R19

Many thanks for the great inputs.

G08 BMW iX3 M-Sport Impressive Piemont Red Metallic on order

[GDEvans]

Originally Posted by the_ape

Prem pro at least on the 20's aren't staggered.

Yes they are. 245/45R20 on the front, and 275/40R20 on the rear.

[the_ape]

Apologies your right, 245 front 275 rear

[Bilbofraggins]

I'm looking at putting 245/50/19 with 255/50/19 on a X3 M40i......anyone done that - vice a square set up using either of the sizes mentioned? Tires will be All Season.

Rims are 19x8 ET27 and 19x8.5 ET40 using a 10mm spacer.

Currently run:

Stock 21"...replaced two front tires in last year due to damage.

Winters - square 235/55/19 Rim 8.5" ET 38 (spacers on rear for looks).

[GDEvans]

Originally Posted by Bilbofraggins

I'm looking at putting 245/50/19 with 255/50/19 on a X3 M40i......anyone done that - vice a square set up using either of the sizes mentioned? Tires will be All Season.

Rims are 19x8 ET27 and 19x8.5 ET40 using a 10mm spacer.

Currently run:

Stock 21"...replaced two front tires in last year due to damage.

Winters - square 235/55/19 Rim 8.5" ET 38 (spacers on rear for looks).

This is the iX3 group. You might want to ask the question in the X3 group.