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Old 31st January 2018, 14:54   #61
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

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Originally Posted by Youcanburn View Post
Guys I have a query and I thank you in advance for going through my post and your advice

I have a 2010 F10 BMW 530d. The car has been running on Yokohama 225/55 R17.
My previous tyres are wearing out and I was looking to replace them with 225/65 R17 since I am using this car for my daily commute (110kms) and some of the roads are very bad where a bigger sidewall I feel will give me a comfortable ride.

Does any one have any experience with this or any advice wether I should go ahead with this or not?
All your comments are greatly appreciated.
Don't go ahead!
While your ground clearance would increase - your speedo error would be off the charts, and you could face clearance issues with the tyre scraping the wheel well too.
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Old 31st January 2018, 15:00   #62
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

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Don't go ahead!
While your ground clearance would increase - your speedo error would be off the charts, and you could face clearance issues with the tyre scraping the wheel well too.
Thank you for your prompt response.

Tyre scraping the wheel well was one of primary concerns.
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Old 2nd April 2018, 18:03   #63
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

Its time to replace the runflat tyres on my 2010 F10 BMW 525d. They are still running on the stock 225/55/R17 tyres. For the upgrade i am looking at regular tubeless tyres specifically Michelin Pilot sport 3st or Pilot sport 4. Now looking at the website, both of them are only available in 45 profile for the 17 in wheel size. Please correct me if i am wrong but going from 225/55/R17 to 225/45/R17 will make the car look undersized and weird.

So i am thinking i will upgrade to 225/45/R18, but then i will have to get new alloy wheels as well. I settled on Japan racing wheels model JR 18. Now the question i have is what offset and what width should i go for? My aim is to get a concave look on the wheels. My future plans include lowering the car and a remap.
Attached Thumbnails
Want to upsize your wheels with lower profile tyres? Read this first-jr18.jpg  


Last edited by abhiram7912 : 2nd April 2018 at 18:04. Reason: typo and sentence correction
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Old 26th March 2019, 14:20   #64
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

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Summary: Upsize, but don't overdo it. Large (heavier) wheels, super low profile tyres and an ultra-fat contact patch can actually kill performance. Choose a reasonable upsize instead.
These rims look fabulous, but he has seriously overdone it. Would love to know more about how his ride quality is, how much his back suffers and how many damaged tyres he has already replaced:
Want to upsize your wheels with lower profile tyres? Read this first-20190324-15.08.00.jpg
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Old 26th March 2019, 14:34   #65
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

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These rims look fabulous, but he has seriously overdone it. Would love to know more about how his ride quality is, how much his back suffers and how many damaged tyres he has already replaced:
Attachment 1863190
Think this car belongs to a friend
Ride quality is not bad but defiantly not as good as regular X5s
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Old 23rd May 2020, 12:06   #66
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

Need some inputs for X5-

Standard size -

Front - 275/45R20
Rear - 305/40R20

Upgraded size

Front - 275/45R21
Rear - 315/40R21

Problems being faced -

Vibrations are observed between 90-140. This is despite getting Balancing checked twice. Upgraded Alloys are BMW OEM and Tyres are Pirelli Zero. Both import from Germany. Rear size should have been 305/40/21 to maintain a higher profile.

But Is it possible that the larger dia is responsible for vibration? Or else what can be wrong?

Last edited by Turbanator : 23rd May 2020 at 12:07.
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Old 23rd May 2020, 12:22   #67
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Default Re: Want to upsize your wheels with lower profile tyres? Read this first

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Originally Posted by Turbanator View Post
Problems being faced -

Vibrations are observed between 90-140. This is despite getting Balancing checked twice.

But Is it possible that the larger dia is responsible for vibration? Or else what can be wrong?
Did you get your tyres road force balanced? I had a similar issue although not on 21inch wheels and road force balancing solved it.
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