When I had the C8, I opted for 5mm. Enhanced the look without that big spacer fear as stated byMurray20c8
Which was?
When they corroded and my wheel fell off? lol
Are the studs long enough? 2 mm is insignificant really. So is 5 mm I suppose. Not sure I'd want to go any bigger than that.
 
Seriously? A wheel spacer corroded and the wheel fell off? WTF??? On a C8? Can you explain this a little more please? Or, if it has been discussed elsewhere, point me there. I haven't been around here long, but as a retired mechanic something just doesn't add up. The bolt on spacers the OP linked to don't require long studs. In fact, depending on the wheel hub face pockets, the studs may have to be trimmed/ground a bit. Slip on spacers often require the OE studs to be replaced with longer ones. If you do things correctly with either type and the spacers/studs are made from a good alloy, ie not a china knock off brand, there should be no wheels falling off. Corrosion? Winter use with salty roads? How long were these on? Was torque rechecked after install and then periodically after?

Are spacers as good as different offset wheels to achieve the stance you're looking for? No. But they are an economical way to achieve a similar goal if precautions are taken with quality components, correct install procedure and torque recheck.
 
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Seriously? A wheel spacer corroded and the wheel fell off? WTF??? On a C8? Can you explain this a little more please? Or, if it has been discussed elsewhere, point me there. I haven't been around here long, but as a retired mechanic something just doesn't add up. The bolt on spacers the OP linked to don't require long studs. In fact, depending on the wheel hub face pockets, the studs may have to be trimmed/ground a bit. Slip on spacers often require the OE studs to be replaced with longer ones. If you do things correctly with either type and the spacers/studs are made from a good alloy, ie not a china knock off brand, there should be no wheels falling off. Corrosion? Winter use with salty roads? How long were these on? Was torque rechecked after install and then periodically after?

Are spacers as good as different offset wheels to achieve the stance you're looking for? No. But they are an economical way to achieve a similar goal if precautions are taken with quality components, correct install procedure and torque recheck.
Sorry, no. Years ago. On a totally other car. Aluminum can corrode. It doesn't lose mass, but it can lose its integrity. Mine shattered eventually and left all the lugs very loose and they sheared off. I lost a rear wheel. Luckily it stayed under the wheel well and the car actually balanced on three wheels. It happened on the 401 and I was really lucky! I'm sure they are built better these days, but it's a warning to be careful and watch them and keep them tight.
 
Spacers of any size are sketchy at best. Usually used when caliper clearance is need for a different wheel than standard. One of the issues with spacers is getting them 100% centrered on each stud on the hub. They have holes larger than the hub stud and the spacer bolts must be finger tightened while moving the spacer slightly to get it 100% centered. It works but very finicky in my experience. I use them (25mm) on my GS with winter tires and wheels from my 2017 Stingray. On a couple of occasions I had to remove a wheel and recenter the spacer - felt like a wheel out of balance. If you are seeking a slightly better appearance - it may not be worthwhile. If you have a performance car specialist in your area, you could ask there advice and experience with spacers.
 
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Spacers of any size are sketchy at best. Usually used when caliper clearance is need for a different wheel than standard. One of the issues with spacers is getting them 100% centrered on each stud on the hub. They have holes larger than the hub stud and the spacer bolts must be finger tightened while moving the spacer slightly to get it 100% centered. It works but very finicky in my experience. I use them (25mm) on my GS with winter tires and wheels from my 2017 Stingray. On a couple of occasions I had to remove a wheel and recenter the spacer - felt like a wheel out of balance. If you are seeking a slightly better appearance - it may not be worthwhile. If you have a performance car specialist in your area, you could ask there advice and experience with spacers.
While I agree about the sketchiness of wheel spacers, why not get hub centric rings to centre them?

And when you say GS, is that a Regal GS for your DD? I have a 2018, very happy with it.
 
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I think some of you folks are generalizing just a little. "Sketchy" would definitely apply if they had to "be finger tightened while moving the spacer slightly to get it 100% centered". If you have to do that, you got the wrong spacers. That's the sketchy bit. Good spacers are hub-centric, such as the ones the OP linked to.
 
Which was?
When they corroded and my wheel fell off? lol
Are the studs long enough? 2 mm is insignificant really. So is 5 mm I suppose. Not sure I'd want to go any bigger than that.
I thought the op said 2mm. 20 is much thinker. You are changing the dynamics of the car like that. More stress on bearings etc.
 
Over the past decade I have had Eibach hub-centric spacers on both a Jaguar XKR and a 68 Mustang Fastback. Direct bolt on with no modification required, and zero issues in years of driving. If memory serves me correctly, I believe that in both cases they were 1/2" spacers, (just in the rears) not an overly aggressive amount. While I appreciate the fact that they do put a bit more strain on the suspension. But, unless you are a serious track user, I would not be overly concerned with using a Good, Name Brand product, and, I do believe that with most performance cars, (as they may be tracked) the suspension components can and will handle much greater stresses than simply driving down the road with spacers.... the C8 is in hibernation now but I'm pretty sure that it too shall receive rear spacers.... prob 1/2".... I can't speak for the experiences of others, but my experiences have been just fine. After driving a couple of weeks with the spacers, I had the rear alignment checked and had no issue with either car, and, I did not experience any premature or uneven tire wear. Torque as recommended and recheck every 6 - 8mos. Modern spacers are a viable option, I can only speak to the brand I had and to them being only 1/2", so, in my opinion, not an overly aggressive width to add.
 
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