Style 172M Weight?

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02-28-2011 | 11:08 AM

#11

Fleainat

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From: Brentwood/LA, CA

My Ride: 2013 550i M Sport 6MT Alpine White, 2013 X5 50i M Sport Alpine White

Since bathroom scales are meant for body weight (100-300 lbs.), and to be as accurate as possible, try holding the rim with your body weight, then weighing yourself without the rim... If you get the same 35 lb weight difference, then this will confirm they are really that heavy.

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02-28-2011 | 11:38 PM

#12

tooltec

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From: UK

My Ride: 2007 530d M Sport Automatic, Le Mans Edition.Le Mans Blue Individual Paint Special, Syrah Blue Individual Leather, Piano Black Individual Interior Trim, Front seat heating,M Double Spoke 172 19

Quote:

Originally Posted by usmabmass

So I'm ordering new wheels for my 550i, and I'd like to know what the weights are for the OEM 172M wheels - anybody have a clue? I'd love to weigh mine, but they were stolen from the car as it was being shipped to me...

I just want to make sure that the Forgestar F14's i'm ordering will actually be lighter (going with ExtremeContact DW). Thanks!

The 8.5Jx19 front is 13.27kg ( 29.26 pounds ) according to :http://felgenkatalog.auto-treff.com/

No weight is given for the 9.5Jx19 rear.

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03-01-2011 | 09:27 PM

#13

kane1111

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From: Bklyn, Ny

My Ride: Navy 550I

Who cares about the weight you drive a 4.8L V8.

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03-01-2011 | 09:51 PM

#14

a42kracer

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From: SJ, CA

While going from one alloy wheel to another I am guessing the weight benefits are on the margin and may not be noticeable to the daily driver. But why pay up for a heavier wheel when there appears to a marginal benefit for a lighter one with better looks to boot!

According to Tire Rack: http://www.tirerack.com/wheels/tech/....jsp?techid=98

While many people choose alloy wheels for their beauty, there are equally important performance benefits to be derived including...

Reduced Unsprung Weight Compared to Steel Wheels
This is one of the most critical factors affecting a vehicle's road holding ability. Unsprung weight is that portion of a vehicle that is not supported by the suspension (i.e. wheels, tires and brakes) and therefore most susceptible to road shock and cornering forces. By reducing unsprung weight, alloy wheels provide more precise steering input and improved "turning in" characteristics.

Improved Acceleration and Braking
By reducing the weight of the vehicle's rotational mass, alloy wheels provide more responsive acceleration and braking.

Added Rigidity
The added strength of a quality alloy wheel can significantly reduce wheel/tire deflection in cornering. This is particularly critical with an automobile equipped with high performance tires where lateral forces may approach 1.0g.

Increased Brake Cooling
The metals in alloy wheels are excellent conductors of heat - improving heat dissipation from the brakes - reducing risk of brake fade under demanding conditions. Additionally, alloy wheels can be designed to allow more cooling air to flow over the brakes.

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