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      02-15-2020, 12:56 AM   #1
wjrnzd
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Question X5 wheel choice: 741M vs 742M

I'm going to order an x40i with M sport package, but can not decide which wheel I should go with.

I love the look of 742M (22"), but have heard that low profile tires (275/35R22 front, 315/30R22 rear) like these are likely to blow out or puncture easily. I live in San Francisco Bay Area, the road condition isn't that good. I was wondering how big is the risk to drive with these four big wheels. Would 21" 741M wheel be a little bit safer?

I'm a first time bimmer, and love to hear everyone's opinion and suggestions. Thanks in advance.
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      02-15-2020, 08:03 AM   #2
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I'm running 22" 742Ms here in NYC and already had one flat - a pothole that did sidewall damage and it wouldn't have mattered if the tires were run flats. There are potholes everywhere here and our roads are shit.

My advice - get whichever wheels appeal to you but make sure to include the spare tire in your build.
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      02-15-2020, 11:24 AM   #3
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I prefer the 742M (22"), I just make sure to bring spare tire all the time.
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      02-15-2020, 09:16 PM   #4
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I have the 742s and the car came with a compact spare
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      02-18-2020, 12:08 AM   #5
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I have the 21" 741M on a 50i M Sport and live in SF. It's a much firmer ride than my old X5 with 19s. I wouldn't want 22s.
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      03-11-2020, 01:23 PM   #6
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Quote:
Originally Posted by Dagwag77 View Post
I'm running 22" 742Ms here in NYC and already had one flat - a pothole that did sidewall damage and it wouldn't have mattered if the tires were run flats. There are potholes everywhere here and our roads are shit.

My advice - get whichever wheels appeal to you but make sure to include the spare tire in your build.
the 22" options wont let you delete the spare. BMW build policy for any option that doesn't include run flats.
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      03-14-2020, 05:25 AM   #7
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Quote:
Originally Posted by Mr. Maboomba View Post
I have the 21" 741M on a 50i M Sport and live in SF. It's a much firmer ride than my old X5 with 19s. I wouldn't want 22s.
Do you have run flats or non-RFT on your 21"?
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      03-14-2020, 02:14 PM   #8
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Quote:
Originally Posted by mobilejo View Post
Do you have run flats or non-RFT on your 21"?
Yes, I have the OE tires for the style 741M wheel, Pirelli P Zero PZ4 RFTs. I had Continental 4x4 Contact SSR run flats on my 2012 X5.
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      03-15-2020, 01:14 PM   #9
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Quote:
Originally Posted by Mr. Maboomba View Post
Yes, I have the OE tires for the style 741M wheel, Pirelli P Zero PZ4 RFTs. I had Continental 4x4 Contact SSR run flats on my 2012 X5.
I have the same 21" wheels and they came with the same P Zero RFT tyres. After only 1200 miles, I changed the tryes for P Zero non-runflats with Pirelli Noise Cancelling System. They are * marked BMW approved tyres in the OEM sizes.

It has made a massive difference, as I knew they would as I do this with every car I get that has RFT tyres.

The ride is much more comfortable over imperfect roads - no more "brace yourself" and then "shudder". And no more driving around every dip and surface break, I just drive over them.

Handling has improved as there is always a little more steering feel with non-RFTs, which means at high speeds you do not get the car wondering slightly without you getting the warning in the steering wheel and being able to make those important micro-corrections to keep your line in the road. I hated that about the RFTs, now it is rock solid upto silly speeds.

The PCNS is very good and the tyres do not roar as much at highway speeds and another advantage is the weight difference - holding both RFT and non-RFT at the same time, you can feel the non-RFT is noticeably lighter.
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      03-15-2020, 01:34 PM   #10
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Thanks for the tip! I will have to try that out when it's time to replace.
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