The 2008 Volkswagen Jetta tire size depends on trim: the S, 2.5 M, Automatic takes 205/55R16 91H; the S, 2.5 M, Standard takes 205/55R16 91H; the S, 2.5 Z, Automatic takes 205/55R16 91H; the S, 2.5 Z, Standard takes 205/55R16 91H; the SE, 2.5 M, Automatic takes 205/55R16 91H; the SE, 2.5 M, Standard takes 205/55R16 91H; the SE, 2.5 Z, Automatic takes 205/55R16 91H; the SE, 2.5 Z, Standard takes 205/55R16 91H; the SEL, 2.5 M takes 225/45R17 91W; the SEL, 2.5 Z takes 225/45R17 91W; the Wolfsburg Edition, 2.0 A, CBFA, Automatic DCT takes 225/45R17 91W; the Wolfsburg Edition, 2.0 A, CBFA, Standard takes 225/45R17 91W; the Wolfsburg Edition, 2.0 A, CCTA, Automatic DCT takes 225/45R17 91W; the Wolfsburg Edition, 2.0 A, CCTA, Standard takes 225/45R17 91W; the Wolfsburg Edition, 2.0 J, Automatic DCT takes 225/45R17 91W; the Wolfsburg Edition, 2.0 J, Standard takes 225/45R17 91W, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
S, 2.5 M, Automatic: 205/55R16 91H
S, 2.5 M, Standard: 205/55R16 91H
S, 2.5 Z, Automatic: 205/55R16 91H
S, 2.5 Z, Standard: 205/55R16 91H
SE, 2.5 M, Automatic: 205/55R16 91H
SE, 2.5 M, Standard: 205/55R16 91H
SE, 2.5 Z, Automatic: 205/55R16 91H
SE, 2.5 Z, Standard: 205/55R16 91H
SEL, 2.5 M: 225/45R17 91W
SEL, 2.5 Z: 225/45R17 91W
Wolfsburg Edition, 2.0 A, CBFA, Automatic DCT: 225/45R17 91W
Wolfsburg Edition, 2.0 A, CBFA, Standard: 225/45R17 91W
Wolfsburg Edition, 2.0 A, CCTA, Automatic DCT: 225/45R17 91W
Wolfsburg Edition, 2.0 A, CCTA, Standard: 225/45R17 91W