MRC question
Thread Starter
Le Mans Master
Joined: Dec 2015
Posts: 8,711
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From: here
MRC question
Would going over potholes with a MRC and non MRC would there be any damage less in one optioned car or the other .
I see a few threads re wheel bent. If decide to buy will try for MRC just wondering. TIA
BTW 2000 extra up here, not too bad.
I see a few threads re wheel bent. If decide to buy will try for MRC just wondering. TIA
BTW 2000 extra up here, not too bad.
Last edited by ojm; Feb 25, 2018 at 08:00 PM.
Moderator
Joined: Feb 2006
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From: DFW Area TX
Bent wheels seem to be much more common on Z06's and Grand Sports based on the following poll: Have You Had a Wheel Bend?
Thread Starter
Le Mans Master
Joined: Dec 2015
Posts: 8,711
Likes: 203
From: here
Yes, on a Z06 16 10.13%
Yes, on a Grand Sport 8 5.06%
Yes, on a Z51 2 1.27%
Yes, on a base Stingray 3 1.90%
No, on a Z06 33 20.89%
No, on a Grand Sport 22 13.92%
No, on a Z51 47 29.75%
No, on a Stingray 27 17.09%
Yes, on a Grand Sport 8 5.06%
Yes, on a Z51 2 1.27%
Yes, on a base Stingray 3 1.90%
No, on a Z06 33 20.89%
No, on a Grand Sport 22 13.92%
No, on a Z51 47 29.75%
No, on a Stingray 27 17.09%
Le Mans Master
Joined: Dec 2014
Posts: 6,140
Likes: 2,745
From: Northeast
I agree that the bent wheel issue is more prevalent with the Z06/GS, however, I’ve never had any problems. There is certainly a greater likelihood of bending a wheel with the system set to track as opposed to tour, but many have reported that the base suspension is “softer” than the MSRC set to touring. So in theory, there is a less likelihood of bending a wheel with the base suspension, although there are many other factors to consider prior to making an accurate assessment.
Melting Slicks
Joined: Aug 2006
Posts: 2,615
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GS/Z06 rims are 1.5 inches wider in the front and 2 inches wider at the back than the Base and Z51 rims. That in itself makes the GS/Z06 rims more prone to bending due to less support on the inner rim.
But as others have stated in other posts, some have and some have not bent their GS/Z06 rims.
But as others have stated in other posts, some have and some have not bent their GS/Z06 rims.
Team Owner
Joined: Oct 2004
Posts: 25,583
Likes: 16,942
I agree that the bent wheel issue is more prevalent with the Z06/GS, however, I’ve never had any problems. There is certainly a greater likelihood of bending a wheel with the system set to track as opposed to tour, but many have reported that the base suspension is “softer” than the MSRC set to touring. So in theory, there is a less likelihood of bending a wheel with the base suspension, although there are many other factors to consider prior to making an accurate assessment.
MSRC is all about the the amount of stiffness delivered to the shocks via variations in the electrical charge delivered to the shocks. Some folks with the programmable DSC MSRC controller have found that you can actually make it way too soft, and much softer than the base car w/o MSRC. DSC has a free "plush" Tour setting that some really like, and others find way too soft.
However, I do agree that GM's original MSRC Tour calibrations were stiffer than the base car.
Last edited by Foosh; Feb 25, 2018 at 11:53 PM.
Team Owner
Joined: Apr 2013
Posts: 26,268
Likes: 4,367
From: Chirper Island
I agree that the bent wheel issue is more prevalent with the Z06/GS, however, I’ve never had any problems. There is certainly a greater likelihood of bending a wheel with the system set to track as opposed to tour, but many have reported that the base suspension is “softer” than the MSRC set to touring. So in theory, there is a less likelihood of bending a wheel with the base suspension, although there are many other factors to consider prior to making an accurate assessment.
Unfortunately, there is a really small pool of people who have enough experience with both for a real comparison.
Team Owner
Joined: Oct 2004
Posts: 25,583
Likes: 16,942
Lisa, in the beginning, the base car w/o MSRC was usually viewed as the most "plush" ride. The Z51 w/o MSRC was viewed as stiffer than the Z51 w/ MSRC in Tour mode, but the latter was still generally perceived as stiffer than the base car w/o MSRC, which has softer springs.
However, the new GM MSRC calibrations and the DSC controller have changed the equation significantly. Moreover, since base cars started being offered w/ MSRC in 16, comparisons here are more apples and oranges than ever before.
However, the new GM MSRC calibrations and the DSC controller have changed the equation significantly. Moreover, since base cars started being offered w/ MSRC in 16, comparisons here are more apples and oranges than ever before.
Last edited by Foosh; Feb 26, 2018 at 12:06 AM.
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Burning Brakes
Joined: Aug 2001
Posts: 837
Likes: 388
From: Olathe KS
Personally I think it has more to do with run-flats due to the stiff sidewalls. I've not had an issue on my Z so far but I run in Sport mode all the time and our roads aren't terrible except during the winter time. Sometimes you can't avoid a pothole due to traffic or just not seeing them until too late to maneuver around it but if you hit a pothole of decent size hard enough in any car you will pop a tire and/or bend a rim. I bent several with my 335 years back until I swapped for non-RFT tires. Something else folks have suggested is that the rims are actually bent in transit somehow so not really from potholes but delivered out of round. Before you buy I'd have the dealer balance all of the wheels to make sure your are straight everywhere.
You should definitely go for the MRC, especially 2017+. Wheel insurance is cheap and would pay for repairs or replacements should you actually scrub the wheel on a curb as well as if you hit a pothole.
You should definitely go for the MRC, especially 2017+. Wheel insurance is cheap and would pay for repairs or replacements should you actually scrub the wheel on a curb as well as if you hit a pothole.
7th Gear
Joined: May 2019
Posts: 7
Likes: 3
Bendy wheels
Personally I think it has more to do with run-flats due to the stiff sidewalls. I've not had an issue on my Z so far but I run in Sport mode all the time and our roads aren't terrible except during the winter time. Sometimes you can't avoid a pothole due to traffic or just not seeing them until too late to maneuver around it but if you hit a pothole of decent size hard enough in any car you will pop a tire and/or bend a rim. I bent several with my 335 years back until I swapped for non-RFT tires. Something else folks have suggested is that the rims are actually bent in transit somehow so not really from potholes but delivered out of round. Before you buy I'd have the dealer balance all of the wheels to make sure your are straight everywhere.
You should definitely go for the MRC, especially 2017+. Wheel insurance is cheap and would pay for repairs or replacements should you actually scrub the wheel on a curb as well as if you hit a pothole.
You should definitely go for the MRC, especially 2017+. Wheel insurance is cheap and would pay for repairs or replacements should you actually scrub the wheel on a curb as well as if you hit a pothole.
One service tech said he thought mine were not balanced or checked from the factory as all 4 wheels were out of balance with the right rear being bent at 500 miles.
I've driven mine in almost exclusively Touring mode.
I do think the run flats could be a contributing factor but the main factor I feel would be they are a cheap Chinese cast wheel that are not capable of functioning problem free on this size of wheel.
So for now, I guess I'm shopping for forged wheels and dumping the run flats.