Infiniti · Q80 · Bar

Recommended bar for a Infiniti Q80

Drivetrain: all-wheel drive
Body: SUV / crossover
PSI F / R: 32-35 / 32-35
Bar F / R: 2.2-2.4 / 2.2-2.4

bar

2.31 / 2.31

32-35 / 32-35 psi · 231 / 231 kPa

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

2.3 bar is not 23 psi. On this Q80 2.2-2.4 bar converts to about 32-35 psi. Use the table, not a guess. Size estimates on this page include 235/60R18, 255/50R20 and 245/60R18 — interpolated from the catalogue midpoint, not a second factory sticker. Keep side-to-side spread inside about 2 psi so the all-wheel drive hardware is not working on a radius mismatch.

Bar, PSI and kPa

Bar-led conversions around the Infiniti Q80. 2.2-2.4 bar is not “32-35 divided by ten”.

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

Infiniti Q80 placard versus sidewall

If the Infiniti sticker is painted over, the handbook is next. This website is a map, not a replacement VIN label.

Estimated pressure by tyre size (235/60R18 and others)

Planning cold pressures for sizes often seen on a SUV / crossover. This Q80 sample opens with 235/60R18, then 255/50R20 and 245/60R18.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
235/60R18	36	36	2.48	2.48	248	248	Plus-size 18-inch
255/50R20	37	37	2.55	2.55	255	255	20-inch plus-size
245/60R18	36	37	2.48	2.55	248	255	Heavier CUV
225/65R17	35	35	2.41	2.41	241	241	Very common 17-inch
245/55R19	36	36	2.48	2.48	248	248	Low-profile 19-inch
215/70R16	34	34	2.34	2.34	234	234	Compact crossover
235/65R17	35	36	2.41	2.48	241	248	Mid-size SUV
225/60R18	35	35	2.41	2.41	241	241	Highway CUV

Load notes

Load moves the rear of a SUV / crossover 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	36 psi / 2.48 bar

How to set the Q80

Park the Infiniti Q80 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 all-wheel drive Q80 is enough to feel a pull.
Refit valve caps and reset TPMS if the handbook asks for a relearn.

Temperature drift

Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this Q80.

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

Infiniti notes

No special Infiniti exception: the Q80 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 Infiniti Q80 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.

Keep the Infiniti Q80 on the printed band; use 235/60R18 and 245/60R18 only as a map for non-OEM wheels.

Other Infiniti models

JX35 QX60 QX70 M37 Q30 EX35 M30 M45

Questions about this Q80

Is the sidewall number correct on a Infiniti Q80?

No. Sidewall PSI is a maximum. The Q80 placard is the operating target, near 32-35/32-35 psi.

What is that in bar and kPa for the Q80?

Mid-points are about 2.31 bar (231 kPa) front and 2.31 bar (231 kPa) rear.

Front versus rear on the Infiniti Q80?

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.

Should I bleed pressure after a motorway run?

No. Heat raises the gauge. Set cold only. Bleeding a hot tyre leaves it low the next morning.

How often should I check a Q80?

Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.

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