Oldtimer · Cadillac · kPa

Oldtimer Cadillac tyre pressure in kPa

Drivetrain: front-wheel drive
Body: passenger car
PSI F / R: 32-35 / 32-35
Bar F / R: 2.2-2.4 / 2.2-2.4

kPa

231 / 231

2.31 / 2.31 bar · 32-35 / 32-35 psi

32-35 psi F · 32-35 psi R · 2.2-2.4 / 2.2-2.4 bar · 231/231 kPa

Kilopascals show up on some Asian stickers and ISO sheets. 231 kPa front and 231 kPa rear is the Oldtimer Cadillac midpoint (100 kPa = 1 bar). TPMS typically warns near 25 psi (about 25% below target). That is already a soft tyre, not a fill target.

kPa, bar and PSI

kPa-led conversions. 220 kPa is 2.2 bar and about 32 psi — handy if this Cadillac sticker uses SI units.

kPa	Bar	PSI
207	2.07	30
221	2.21	32
228	2.28	33
231	2.31	33.5
241	2.41	35
248	2.48	36
262	2.62	38
276	2.76	40
303	3.03	44
345	3.45	50
414	4.14	60

Estimated pressure by tyre size (225/40R18 and others)

225/40R18 is the first planning size here. 215/55R16 is usually the plus-size or LT step. Keep load index at or above original equipment.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
225/40R18	36	36	2.48	2.48	248	248	Low-profile 18-inch
185/65R15	33	33	2.28	2.28	228	228	Small / older car
215/55R16	34	35	2.34	2.41	234	241	Slightly wider 16-inch
225/45R17	35	35	2.41	2.41	241	241	Sport 17-inch
205/55R16	34	34	2.34	2.34	234	234	Typical mid-compact OEM
225/50R17	35	35	2.41	2.41	241	241	Touring 17-inch
245/40R18	36	36	2.48	2.48	248	248	Wide touring 18-inch
205/60R16	34	34	2.34	2.34	234	234	Taller 16-inch

Oldtimer Cadillac placard versus sidewall

Sidewall PSI is a carcass maximum. Recommended operating pressure for this Cadillac is the pillar sticker, near 34/34 psi.

Temperature drift

Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this Cadillac.

Ambient	Gauge (front mid)	Bar	kPa	Note
−5 °C (hard frost)	31 psi	2.14 bar	214 kPa	Gauge reads low; do not overfill once warm
0 °C	32 psi	2.21 bar	221 kPa	Gauge reads low; do not overfill once warm
8 °C (UK winter morning)	33 psi	2.28 bar	228 kPa	Gauge reads low; do not overfill once warm
20 °C (set cold here)	34 psi	2.34 bar	234 kPa	Baseline
30 °C	36 psi	2.48 bar	248 kPa	Do not bleed a hot tyre
38 °C (heatwave tarmac)	37 psi	2.55 bar	255 kPa	Do not bleed a hot tyre

How to set the Cadillac

Park the Oldtimer Cadillac for at least three hours (cold tyres).
Use a calibrated gauge, not the only meter on a forecourt hose.
Set the placard for that axle — about 32-35 psi / 2.2-2.4 bar front and 32-35 psi / 2.2-2.4 bar rear on this catalogue row.
Recheck all four. A 2 psi miss on a front-wheel drive Cadillac is enough to feel a pull.
Refit valve caps and reset TPMS if the handbook asks for a relearn.

Load notes

Load moves the rear of a passenger car first. If the factory placard already has a “laden” column, use that instead of these sketches.

Condition	Front (est.)	Rear (est.)
Driver only	34 psi / 2.34 bar	34 psi / 2.34 bar
Full occupancy	34 psi / 2.34 bar	35 psi / 2.41 bar
Motorway + luggage	35 psi / 2.41 bar	37 psi / 2.55 bar

Oldtimer notes

No special Oldtimer exception: the Cadillac uses the door-pillar placard. Size estimates on this page only help if you have left the original load index behind.

Spare and inflator kit

A matching full-size spare on the Oldtimer Cadillac usually follows the higher axle (often the rear, near 32-35 psi). A space-saver is commonly 60 psi / 4.1 bar — read that tyre’s own sidewall. An inflator kit is not a spare; check the sealant date.

If the Oldtimer sticker and this page disagree, the sticker wins.

Other Oldtimer models

Auburn Allard Alvis Adler AC ASA Armstrong Siddeley Avanti

Questions about this Cadillac

Front versus rear on the Oldtimer Cadillac?

This row is 32-35 F / 32-35 R. Even when they match, a laden rear can justify a higher number if the sticker prints one.

What tyre pressure should a Oldtimer Cadillac use?

Catalogue reference is 32-35 psi front and 32-35 psi rear (2.2-2.4 / 2.2-2.4 bar), cold. Confirm on the door-pillar placard.

When does TPMS warn on a Oldtimer Cadillac?

Direct TPMS typically flags about 25% below placard — near 25 psi on this row. Fill to the sticker, not to the lamp.

What PSI if I plus-size toward 215/55R16?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 225/40R18, 185/65R15 and 215/55R16 as a planning band.

Is the sidewall number correct on a Oldtimer Cadillac?

No. Sidewall PSI is a maximum. The Cadillac placard is the operating target, near 32-35/32-35 psi.

Handbook: placard · bar vs PSI · front vs rear · cold inflation