BoxKing

Just got the call from my tire guy. SC3’s are on order w/heat cycling in the desired sizes listed above. This had to be specially requested direct with TR, it’s not a selectable option on their site. Tires will be delivered to shop on Thursday, wheels arrive this Wednesday, mounting all 4 by Friday.

They have Autel metal TPMS in stock, in a silver finish. Will be picking these up tomorrow to spray paint them with high temp flat black paint. My OCD will be through the roof if I see the silver stems. Now I need to source Satin Black GT4 center caps, then paint fill them in white or blue.

ExMB

I would suggest not to get the Autel TPMS. I had those and they read 2-3 psi low when compared to the tire with a good Longacre gauge. They did not improve even after reprogramming.

BoxKing

I’ll admit, I only added the TPMS info to my post with hopes that someone would tell me not to use these . I spent over an hour researching TPMS options on here, to come to a conclusion that basically anything would suffice, and Autel isn’t considered “Junk”, so I planned to roll with what my shop had available. TY for the Pro Tip

Im going to request them to order these off TR to be sure everything reads out well:

433MHZ TIRE PRESSURE SENSOR

• Manufacturer Part #: RDE047V21

I also use a Longacre digital gauge and I’ll look to see how these match up with the onboard readouts

ExMB

There actually is a thread on TPMS in here. People were having issues with 20 or 21 718s. They figured it out and posted the websites and partnumbers of which sensors to use.

BoxKing

I read a good portion of it, which is how I knew the backup plan was to buy those TPMS’s off TR. This will be my first time using the learning function 20” to 19” wheels for track use. It appears that I should avoid using Race Mode, and live with the low TPMS alert on the dash, until I get used to the process of going back and forth between sets. From what I gather, the trick is to ensure the swapped set has an active displayed pressure readout prior to making changes… Honestly its a little confusing, so I’ll hope to figure it all out on the fly.

ExMB

Here is the TPMS info posted on the sensor of my '23: VW AG 5Q0 907 275F which the internet says = 9A790727502 which my dealer says has been superseded by PAB 907 275.

TRSCobra

I've got a set of HUF RDE018 with my Apex track setup and they work well. Still have issues with it not going into back track mode sometimes but I've never had errors associated to high temps like the stock TPMS did.

BoxKing

TY again. Im going to order the OEM sensors through TR - RDE047V21

In the case I fall victim to the sensor issues that plagued others, at least the sensors being installed in my new wheels will match the P/N that were installed from the factory. This will be one less thing the service department can use as an excuse against a resolve on their end “well its not OEM, so this seems to be a you thing, not us”.

BoxKing

It’s too late for me to get those from Apex, and I dont want to pay for expedited shipping when there is a viable option readily available. The ones on TR are the same P/N that was stated to work just fine in the TPMS Failure threads. I really dont care about so called errors at the moment, just as long as the readouts are accurate, I’ll follow the outlined Race Mode procedures, and I have simple workarounds for the -PSI errors that I see post track days. I got bigger fish to fry with installing suspension bits just to get the wheels to mount without fender/duct contact to be fussing around with damn sensors.

I do appreciate the input form those that chimed in

lovetoturn

Stick with the TR Huf ones. Some of the other sellers use a generic version and program it to your specific car which can create problems with getting them to work. So my mechanic says and he has done hundreds these.

nofferman

Just purchased a set of Apex VS-5RS 19x9 and 19x10.5 rims for my '21 GT4, and looking to get some AD09 tires for the track. I'm installing front camber plates soon as well.

Are there any downsides to running 255/35R19 tires in front, instead of 245/40R19's? Is the steering feel worse? Is the speedometer off because of the smaller circumference in front?

Thanks for all of the great info in the thread!

vantage

See Apex's helpful fitment guide at the link below:

• You may also be altering front to rear rake depending on the tire you pick. The 255 front is only 26" tall, so this alters the OEM rake the most with the options in the chart. I wonder why they don't chart a 295/30 option as well, maybe tire availability or a thin sidewall?
• I personally don't like to change the front to rear ratio significantly in case there are ESC / traction control confusion because of it, but I suppose if you are at that level of driver, you might drive with aids off anyway. If your car is already corned balanced, you'll have to redo it after changing wheels as well. For that reason I went with 245/285 combo in RE71RS.
• I wouldn't worry about small difference in steering feel if any between 245 and 255. Plenty of guys running 265/305 setup successfully at the track.
• I personally like Option 2 or Option 7 the best.
• Yes, if you downsize the rear tires, your speedo will run a little high.

https://rennlist.com/forums/718-gts-...l#post17997535

B-Line

In the event I decide not to get a set of track wheels and just run on the stock wheel size...
Is there a consensus on what tire I should run for mostly track?
- I care more about cost/value (within reason) than I care about maximizing perofrmance/lap times.
- I might add camber, etc. but not until after I have a few days with the GT4 stock on track.
- advanced driver.

BoxKing

The best bang for your buck on OEM 20's will be the Advan AD09's.

With regards to alignment, I see no reason to wait. Factory alignment is garbage, and something I wished I had done before taking delivery. You can optimize an alignment using the stock suspension with a few MM's in shims in the front to achieve -2.2F/-1.7R, 0 TOE/F, 1 TOE/R. This was the setup I went with back in March, and the feel on the streets was felt instantly, on track even better. Im not an advanced driver, though this setup allowed for damn near even tread wear based on my current driving ability. Going -3F/-2.5R, .5 Toe In/F, 2 TOE OUT/R next month, mainly due to buying a dedicated 19' track wheel setup, running 265/305's. Do I need all that camber right now... possibly not, but I do for those tires sizes which I would want to run at some point (265/305 just mounted), I saw no reason not to go this route, and now I'll have all the tire options available to me.

B-Line

Good info. I'll give it a try. I probably should have mentioned that I live in SoCal and it's not my DD in any way shape or form.. So wet or cold performance is fairly irrelevant.
The car has got PZero's on it right now. I'll burn those down first.
Assuming I will definitely need track pads though, right? And of course brake fluid.

Do most of you have Tirerack heat cycle your tires?