1981 Chevrolet C20 tire and wheel sizes, bolt pattern and tire pressure

Check the tables below for every tire size, wheel size, bolt pattern (PCD), rim offset and tire pressure fitted to the 1981 Chevrolet C20.

1981 Chevrolet C20 tire sizes

235/85R16

Bolt pattern

8x165.1

Other years

1977 1978 1979 1980 1981 1982 1983 1984 All 1974–1986

Fitment tables

5 trims sold in 1981

Open a trim for its factory package and every alternative size, front and rear.

Chevrolet C20 C20

1976 – 1980 5 trims

C20 4.1 250cid

N/A · 4.1L I6 235/85 R16 1 fitment

GenerationC20 1976–1980

PowerN/A

Engine4.1L I6, Petrol

Center bore115.9 mm

PCD8x165.1

Thread9/16" - 18 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/85 R16	16x7.5 ET0 ~~8x165.1~~	–	Tires Rims

C20 4.8 292cid

N/A · 4.8L I6 235/85 R16 1 fitment

GenerationC20 1976–1980

PowerN/A

Engine4.8L I6, Petrol

Center bore115.9 mm

PCD8x165.1

Thread9/16" - 18 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/85 R16	16x7.5 ET0 ~~8x165.1~~	–	Tires Rims

C20 5.0 305cid

N/A · 5.0L V8 235/85 R16 1 fitment

GenerationC20 1976–1980

PowerN/A

Engine5.0L V8, Petrol

Center bore115.9 mm

PCD8x165.1

Thread9/16" - 18 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/85 R16	16x7.5 ET0 ~~8x165.1~~	–	Tires Rims

C20 5.7 350cid

N/A · 5.7L V8 235/85 R16 1 fitment

GenerationC20 1976–1980

PowerN/A

Engine5.7L V8, Petrol

Center bore115.9 mm

PCD8x165.1

Thread9/16" - 18 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/85 R16	16x7.5 ET0 ~~8x165.1~~	–	Tires Rims

C20 7.4 454cid

N/A · 7.4L V8 235/85 R16 1 fitment

GenerationC20 1976–1980

PowerN/A

Engine7.4L V8, Petrol

Center bore115.9 mm

PCD8x165.1

Thread9/16" - 18 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/85 R16	16x7.5 ET0 ~~8x165.1~~	–	Tires Rims

Reading the table

What these columns mean

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
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.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.