The tire compound and construction will make a far greater difference in ride and handling than the 10mm increase in tire width. Get rid of the Pirellis.

 

@powerhouse Thanks for the write-up. What brand spacers did you go with?

 

H&R spacers and Eibach springs

 

I have the same F-type and I love your wheels. Looking to change out and I was wondering if you could share the manufacturer's name of them. Thanks

 

Another dirty secret about the tire industry is that tire measurements are not standardized across the industry!

For example:
Michelin PS 4S 295/30/20 has an actual measured width of 11.1" or 281mm
Michelin PS 4S 305/30/20 has an actual measured width of 11.2" or 284mm
Pirelli PZero 295/30/20 has an actual measured width of 10.1" or 256mm
Pirelli PZero 305/30/20 has an actual measured width of 10.8" or 274mm

Another consideration is that even though a specific tire size can be mounted on an approved rim, that does not mean better handling:
Using a Pirelli 305 (274MM) tire as a an example, it is rated to be mounted on a rim from 10.5-11.5 inches
- If mounted on a narrower rim (10.5" or 266mm), you'll have 8mm of shoulder roll when you corner (274mm-266mm)
- If mounted on a wider rim (11" or 280mm) you'll have 6 mm of shoulder roll when you corner (280mm-274mm)

I'd watch the video below:
https://www.tirerack.com/videos/inde...=946&tab=Tires