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PostPosted: Tue Dec 31, 2019 10:48 am 
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Year and Trim: 2005 Bonneville GXP
I have a 2005 Bonneville GXP and would like to find alternative wheels and tires to drive the car in the Minnesota winters. Any suggestions, specifically the type of wheel that will work while maintaining steering geometry, rolling radius, etc.? I would like to find a similar looking alloy wheel if available.


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PostPosted: Wed Jan 01, 2020 11:15 pm 
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Joined: Wed May 13, 2009 10:45 pm
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Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
Really any GM wheel should fit the Bonneville. Be it 16, 17, or the OEM 18" size. You would just have to play the tire size game to get it to maintain the same rolling diameter.

Your cars' 18" wheels come with a 235/50-18 tire size. This equates to a diameter of 27.3".

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Direct OEM replacements would be 2006 - 2009 18" Impala SS/Monte Carlo SS wheels (they also use the same 235/50-18 tire size);

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Another OEM GM 18" wheel is the 2006 - 2009 Grand Prix GXP wheels, HOWEVER, these have slightly different factory sizes (two sizes, one is different for the front to quell some of the torque steer), so you'd have to re-tire them with the 235/50-18 size... Otherwise the front 255/45-18 is the closer size of the two at 27" diameter.

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But if you wanted a cheap 17" wheel for winter, the tire size I quickly come up with that would be as close as possible would be 245/55-17. It is 27.6" in diameter.

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PostPosted: Fri Jan 03, 2020 9:58 am 
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Joined: Tue Dec 31, 2019 10:39 am
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Year and Trim: 2005 Bonneville GXP
Thanks for the great information. However, what am really looking for is a narrower tire to run in the snow, a wheel that fits over the larger brakes on the GXP and can accommodate a narrower tire and has the same or close to the same rolling radius. I do not want the same size wheel, I'm looking for a narrower wheel....any additional thoughts. Again, I appreciate the detailed response to my previous post.


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PostPosted: Fri Jan 03, 2020 6:35 pm 
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Location: Browerville, MN
Year and Trim: 2004 GXP - plus a handful of other Bonnevilles
The 17" Bonneville SLE/SSEi wheels do fit on the GXP. They are a 7.5" width whereas the GXP wheels are 8" wide. I do have wheels available if you're interested. You could run a 225 width tire, maybe even 215.

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PostPosted: Fri Jan 10, 2020 3:48 pm 
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harofreak00 wrote:
The 17" Bonneville SLE/SSEi wheels do fit on the GXP. They are a 7.5" width whereas the GXP wheels are 8" wide. I do have wheels available if you're interested. You could run a 225 width tire, maybe even 215.


I've run 215/55 on the 6 spoke SSEi wheels. It can be tough to get to bead on the rim for the first time but drive-ability was fine.


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