[Alpha1BC]

Sorry in advance for thread-jacking a thread about tires, but had a few things I wanted to mention.

Tire size makes no difference to MRC ride height sensors. The sensors pick up suspension position relative to the body, not body to ground. You'd need a spring or other suspension change to impact the resting suspension height. EDIT - As Mr. Wyndham already stated, sorry for originally missing that

As for the dampers changing ride height, I also don't see how that's possible. The damping force changes by adjusting a magnetic field that controls the viscosity of the fluid inside the damper. They don't have any pumps to generate the pressure needed to raise or lower the car. They are just like a hydraulic damper in the sense that they can't generate force internally to cause motion, they can only make the damper easier or harder to move.

Provoste, I'm assuming you lift the car from the sides and not the front and rear? Do you by any chance have metal plates to put grease between to set under the wheels when you lift and lower a side? That would help the wheels to move free laterally and avoid any tire/bushing preload that would cause the car to sit higher after lowering. Another thing you can try is jouncing the car after it's set back down. The dampers could only hold the car up by going to their maximum stiffness setting, so if the car moves when you push on the corner I'm betting it's not the dampers holding it up.

I'd also like to add that I had to lift and lower my car on the alignment rack that does the same thing that the metal plates would do (lets the wheels move relative to the ground without causing any suspension/tire preload), and I noticed no change in resting ride height although I wasn't specifically measuring it. I have noticed it sits higher after using the jack in my driveway, but I also noticed that the tire is a bit deformed and it goes back to normal once the car rolls a little, even with the car off.

[Mr. Wyndham]

Here's what a quick lift with a floor jack will do to a ZL1 1LE ride height (I was switching the camber plates from track to street for a road trip on Saturday). Just for kicks I took a picture right after I put the car back down, and then after I rolled him a few feet into his spot.

(Don't mind the rotors...brakes have only had about 60 highway miles to detox after Pocono...)

BEFORE:



AFTER:

[FollowMyLine]

Originally Posted by Provoste

Also, its really annoying when threads are moved. The OP was clearly trying to make SS 1LE owners aware of the new sizes...

Yes, this is exactly the case. I agree especially since it was moved to the forum that is sponsored by Tire Rack, and this size is exclusive to Goodyear stores.

I also didn’t select subscribe when new posts are made as an option, as I thought no one had seen this, or that it was removed. Is there a way to set that option to automatically subscribe when posting or creating a thread?

[driven2exceSS]

Has anyone actually been able to acquire the 285/305 3R's in 20" yet?? I initially tried to order a set back 4/18 and after multi backorder date bumps I cancelled the order. I recently tried to order again to try a set for myself, and the "backorder" cycle continues.... Thanks

[arpad_m]

Originally Posted by M0DRN71

I also didn’t select subscribe when new posts are made as an option, as I thought no one had seen this, or that it was removed. Is there a way to set that option to automatically subscribe when posting or creating a thread?

I know it's been a few weeks, but in case this is still relevant, try User CP > Edit Options, then this:

[FollowMyLine]

Originally Posted by arpad_m

I know it's been a few weeks, but in case this is still relevant, try User CP > Edit Options, then this:

Thanks! I just changed the setting.

[FollowMyLine]

Originally Posted by driven2exceSS

Has anyone actually been able to acquire the 285/305 3R's in 20" yet?? I initially tried to order a set back 4/18 and after multi backorder date bumps I cancelled the order. I recently tried to order again to try a set for myself, and the "backorder" cycle continues.... Thanks

I see they are available at Discount Tire now as well. Where have you tried ordering from?

[MatthewAMEL]

Originally Posted by Matos1LE

I'd read somewhere that the MRC has a ride height setting. Since the 19's cause the car to sit lower, you had to have the suspension height setting zero'd so it would work optimally. This is coming from one of the guys on the facebook page who autocrosses/tracks often. I would love to hear that he's completely wrong and it doesn't matter at all, I'll have 19's in no time if that's the case!

This 'zero' procedure you describe is used with the DSC Sport MRC controller. It is a real procedure that has to be done when you swap wheel sizes.


https://www.dscsport.com/tuning-acad...-37efce3f-6374



The OEM MRC controller doesn't have a 'zero' procedure.

[driven2exceSS]

Originally Posted by M0DRN71

I see they are available at Discount Tire now as well. Where have you tried ordering from?

Summit

[FollowMyLine]

Originally Posted by driven2exceSS

Summit

Give Discount Tire or a Goodyear service center a shot. May be able to get them sooner, rather than never. Lol

[driven2exceSS]

Has anyone put their hands on a set of 20" 3R's yet?????????? Last time I checked with a local GoodYear Service Center they were not available, yet (supposedly). I have not tried Discount Tire though, and it has been a bit since I tried a GoodYear Service Center again. I have been waiting on an actual ship date that Summit continually keeps pushing out and Out and OUT, over and Over and OVER AGAIN!!!!! I would think if these tires are indeed available in 20" that Summit would be able to get their hands on them just as much as any other company. Anyone???

[FollowMyLine]

Originally Posted by driven2exceSS

Has anyone put their hands on a set of 20" 3R's yet?????????? Last time I checked with a local GoodYear Service Center they were not available, yet (supposedly). I have not tried Discount Tire though, and it has been a bit since I tried a GoodYear Service Center again. I have been waiting on an actual ship date that Summit continually keeps pushing out and Out and OUT, over and Over and OVER AGAIN!!!!! I would think if these tires are indeed available in 20" that Summit would be able to get their hands on them just as much as any other company. Anyone???

I just got a quote from my local Goodyear place 2 weeks ago, and he said that they had 2 in Indiana and 2 more somewhere else (can’t remember which state) and that it would take 3-4 days to come in. I didn’t end up buying them because my SC3’s are nearly new.

[driven2exceSS]

Originally Posted by M0DRN71

I just got a quote from my local Goodyear place 2 weeks ago, and he said that they had 2 in Indiana and 2 more somewhere else (can’t remember which state) and that it would take 3-4 days to come in. I didn’t end up buying them because my SC3’s are nearly new.

Interesting, thank you. Were you looking to run the "traditional" 285/305, or were you going to 305's "squared"?? I ask based on other reported availability of just 305's in the Road Course/Track and Autocross forum/tread.

[RUQWIKR]

https://www.goodyear.com/en-US/tires...-3/sizes-specs

Finally showing official sizes / specs for the 3's instead of 3R's. Would be a good tire for ZL1 1LE's running in a 200TW+ Class. The various sizes, diameters, availability (eventually), and stated 8/32" Tread Depth should make them legal in SCCA. FYI.