Has anyone tried 245/35/20 front and 305/30/20 rare? The diameter diff is about 1.5% which is acceptable for AWD (not ideal). The track tire I want does not has Jaguar OEM sizes, so wanna see if anyone has experience.

Additionally, anybody tried getting 10.5 inch wheels in the front to match the rare and mount with 4 identical tires? Please share me your thoughts!

Great thanks

 

The AWD on the F-Type doesn't work like "normal" AWD does. I'm not sure if the difference is as important. Maybe? I've got RWD but as I understand it, the AWD cars are effectively RWD until rear wheel slippage occurs, then up to 50% of power will be applied to the front.

 

You're confusing AWD with 4WD. Jaguar's AWD is basically RWD (as you've said) until the car decides a bit of front pull would help. I think rain/snow mode does a 50/50 split, but am willing to be corrected on that.

 

You are correct. Activating that mode forces a 50/50 split, but also changes the throttle response/shift points.

 

No, no one has tried to put the 10.5 on the front. Why would you? All it would do is make the car perform worse and it would look rather silly, too.

 

No confusion on my part, but perhaps I shouldn't have used the term "normal" since there are a number of different normal systems. Jaguar's AWD resembles the Haldex system, such as used by Volvo, and not the "Symmetrical AWD" used by Subaru. The latter has a center differential with a viscous coupling, so needs front and rear wheels to be the same rolling diameter. Then there are other flavors of Subaru system. The STi had (maybe still does) a cockpit-adjustable power split. I had to work on Jeep at one time, and I remember they clearly distinguished between 4WD and AWD, the former clearly identified as not to be engaged on pavement.