255/35/19 and 275/35/19

-cj- · 09-19-2020, 10:08 PM

Hey all,

First off, I know these are the wrong sizes.

I have like new winter tires from another car that I was thinking of mounting on my X3. Besides the speedo being off, will this case any damage to the transfer case or anything else on the car? It's a 2015 35i.

I can live with the wrong speedo numbers, considering I barely drive during COVID times..

richardodn · 09-20-2020, 05:24 AM

255/35/19 has a rolling diameter of 26.0" while the 275/35/19 is 26.6". So no, those two sizes are too far apart for an AWD car.

Taoster · 09-21-2020, 12:21 AM

front and rear wheels need to be rotating at the same speed or the closest possible otherwise you will mess up your differential in the long run. I forgot what website it is, but you can look up tire size and wheel speed and it calculates the rotations.

-cj- · 09-25-2020, 10:03 PM

Thanks guys.. guess I'll suck it up and buy a set of tires with proper specs

09-19-2020, 10:08 PM	#1
-cj- Captain 198 Rep 799 Posts Drives: '20 X5MC \| '20 Z4 Join Date: Dec 2011 Location: Toronto iTrader: (3)	255/35/19 and 275/35/19 Hey all, First off, I know these are the wrong sizes. I have like new winter tires from another car that I was thinking of mounting on my X3. Besides the speedo being off, will this case any damage to the transfer case or anything else on the car? It's a 2015 35i. I can live with the wrong speedo numbers, considering I barely drive during COVID times.. __________________ Current: <pending> \| '20 Z4 M40i Past: 09 M3 Coupe DCT (sold) \| 11 1M Coupe MT (sold) \| 15 i3 REX (returned) \| 15 X3 35xi (sold) \| 16 M235xi Vert (returned) \| 18 M3 Comp Ultimate DCT (sold) \| 20 X5 M Comp (totalled)
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09-20-2020, 05:24 AM	#2
richardodn First Lieutenant 160 Rep 348 Posts Drives: '12 X3 35iX/'20 440ix cabrio Join Date: Dec 2018 Location: Denver, CO iTrader: (0)	255/35/19 has a rolling diameter of 26.0" while the 275/35/19 is 26.6". So no, those two sizes are too far apart for an AWD car.
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09-21-2020, 12:21 AM	#3
Taoster Enlisted Member 21 Rep 33 Posts Drives: F25 n20 Join Date: May 2018 Location: san jose, ca iTrader: (0)	front and rear wheels need to be rotating at the same speed or the closest possible otherwise you will mess up your differential in the long run. I forgot what website it is, but you can look up tire size and wheel speed and it calculates the rotations.
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09-25-2020, 10:03 PM	#4
-cj- Captain 198 Rep 799 Posts Drives: '20 X5MC \| '20 Z4 Join Date: Dec 2011 Location: Toronto iTrader: (3)	Thanks guys.. guess I'll suck it up and buy a set of tires with proper specs __________________ Current: <pending> \| '20 Z4 M40i Past: 09 M3 Coupe DCT (sold) \| 11 1M Coupe MT (sold) \| 15 i3 REX (returned) \| 15 X3 35xi (sold) \| 16 M235xi Vert (returned) \| 18 M3 Comp Ultimate DCT (sold) \| 20 X5 M Comp (totalled)
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