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Typical replacements could be
Front 285/35/ZR20 100Y
Bridgestone Potenza RE050A
UTQGL 140AA
outer diameter 27.9
RPM747
Tread depth 9/32
Ship Weight 31 pounds
GM part#19251930
LIST $427.27
Pirelli PZero
UTQGL 220AA A
outer diameter 27.8
RPM 746
Tread depth 11/32
ship weight 30 pounds
GM part #19193048
LIST $576.14
Pirelli PZero
UTQGL 220AA A
outer diameter 27.9
RPM 748
Tread depth 9/32
Ship Weight 29 pounds
GM part #19194889
LIST $576.14
Rear 305/35/ZR20
Bridgestone Potenza RE050A
UTWGL 140A A
outer diameter 28.3
RPM 736
Tread Depth 8/32
Ship Weight 38.
GM Part #19194751
LIST $513.64
Pirelli PZero Asimetrico
UTQGL 160AA A
outer diameter 28.4
RPM732
Tread depth 10/32
Ship weight 32 pounds
GM #19185746
List $640.91
Pirelli PZero
UTQGL220AA A
outer diameter 28.4
RPM N/A
tread depth 8/32
Ship weight 30. pounds
GM part #19252818
List $703.41
Keep in mind the weight will effect handling slightly
Don't forget the polished wheels weight more to begin with
All of these list Wet AND dry performance except the Asimetrico
Good Luck
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