Lower Profile Winter Tires on 530xi
11-30-2005, 08:12 PM
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I just "inherited" a set of Blizzaks, sized 225/45R17. The stock all weathers on the 503xi are 225/50R17. Other than accentuating the already large wheel well gap with lower profile tires (an aesthetic issue) is there anything else problematic using the Blizzaks with the lower profile on the 530xi (i.e., safety/fitment issues)? I wouldn't think so, but I'm no expert.
Thanks.
Thanks.
11-30-2005, 08:17 PM
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Originally Posted by jeffreybowman' post='205535' date='Dec 1 2005, 12:12 AM
I just "inherited" a set of Blizzaks, sized 225/45R17. The stock all weathers on the 503xi are 225/50R17. Other than accentuating the already large wheel well gap with lower profile tires (an aesthetic issue) is there anything else problematic using the Blizzaks with the lower profile on the 530xi (i.e., safety/fitment issues)? I wouldn't think so, but I'm no expert.
Thanks.
Thanks.
11-30-2005, 08:21 PM
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I just "inherited" a set of Blizzaks, sized 225/45R17. The stock all weathers on the 503xi are 225/50R17. Other than accentuating the already large wheel well gap with lower profile tires (an aesthetic issue) is there anything else problematic using the Blizzaks with the lower profile on the 530xi (i.e., safety/fitment issues)? I wouldn't think so, but I'm no expert.
Thanks.
Thanks.
[/quote]
That's interesting. I guess I had heard about that. Is there any way to calculate just how far off it would be with a 5% lower aspect ratio? (50 to 45). If that's the only issue, I could probably live with it -- so long as the speedometer is not too far off!
12-01-2005, 04:52 AM
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My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
The speedometer will show minus 4 % less at 100 km/h.
The diameter will decrease 24 mm.
Of course this change will also increase your gas consumpion.
The diameter will decrease 24 mm.
Of course this change will also increase your gas consumpion.
12-01-2005, 06:00 AM
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For your information, here is how you calculate tire dimensions:
http://www.tirerack.com/tires/tirete...e.jsp?techid=7
...including overall diameter, which lets you calculate circumference, which in turn lets you find rotational differentials (i.e., your speedometer difference).
http://www.tirerack.com/tires/tirete...e.jsp?techid=7
...including overall diameter, which lets you calculate circumference, which in turn lets you find rotational differentials (i.e., your speedometer difference).
12-01-2005, 07:26 AM
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Originally Posted by das' post='205653' date='Dec 1 2005, 10:00 AM
For your information, here is how you calculate tire dimensions:
http://www.tirerack.com/tires/tirete...e.jsp?techid=7
...including overall diameter, which lets you calculate circumference, which in turn lets you find rotational differentials (i.e., your speedometer difference).
http://www.tirerack.com/tires/tirete...e.jsp?techid=7
...including overall diameter, which lets you calculate circumference, which in turn lets you find rotational differentials (i.e., your speedometer difference).
thanks. i guess the only problem i can think of that could make a difference is reducing the clearance under the car due to lower profile tires -- which would appear to be less than an inch based on the formula given in your link. hopefully, that is not significant enough to cause damage (or get me stuck in a deep snow drift).
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