1998 Cadillac Seville tire and wheel sizes, bolt pattern and tire pressure

Bolt pattern 5x115 on every 1998 trim.

Tires for the 1998 Cadillac Seville

Sizes most trims come with first. Open your trim below for its exact size.

235/60R16 Best-rated standard on 2 trims

Check price on Amazon · 235/60R16
235/55R17 Best-rated optional on 2 trims

Check price on Amazon · 235/55R17
235/50R18 Best-rated optional on 2 trims

Check price on Amazon · 235/50R18

TireWheelGuide may earn a commission from purchases made through these links.

Trims sold in 1998: 2
Generation: G-body
Other years: 1994
1995
1996
1997
1998
1999
2000
2001
All years (1975–2004)

2 trims sold in 1998

Open a trim for its tire and rim sizes, bolt pattern and tire pressure. Trims with the same tires and wheels share a row.

Cadillac Seville G-body

1998–2004 2 trims

Seville 4.6i +1 variant 275 hp · 4.6L LD8 V8 235/60R16 99T 4 fitments

2 versions of this trim share these tires and wheels.

Generation: G-body · 1998–2004
Power: 275 hp
Engine: 4.6L LD8 V8, Petrol
Center bore: 70.3 mm
Bolt pattern: 5x115
Thread: M12 x 1.5

Check price on Amazon · 235/60R16 Wheels 16x7 ET51 · 5x115 · 70.3 mm on Amazon

Tire size	Rim size and bolt pattern	Pressure, psi
235/60R16 99T	Rim 16x7 ET51 ~~5x115~~	30 psi
235/55R17 98H	Rim 17x7.5 ET50 ~~5x115~~	30 psi
235/50R18 98V	Rim 18x7.5 ET50 ~~5x115~~	33 psi
255/45R18 97W	Rim 18x8 ET48 ~~5x115~~	33 psi

How to read 99T: 99 is the load index (up to 1,709 lb / 775 kg per tire) and T the speed rating (up to 118 mph / 190 km/h). ET51 is the wheel offset: how far the mounting face sits from the rim centre, in millimetres. Compare offsets in the wheel offset calculator.

What these columns mean

Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.