Lexus · NX 450h+ · Bar

Lexus NX 450h+ bar chart (2.2-2.4 / 2.2-2.4)

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

European and UK handbooks usually quote bar. The Lexus NX 450h+ catalogue is 2.2-2.4 bar front and 2.2-2.4 bar rear (midpoint 2.31 / 2.31). Under-inflation cooks the shoulders of a NX 450h+; over-inflation wears the centre rib and bangs every cat’s eye. 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 Lexus NX 450h+. 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

Lexus NX 450h+ placard versus sidewall

Sidewall PSI is a carcass maximum. Recommended operating pressure for this NX 450h+ is the pillar sticker, near 34/34 psi.

Estimated pressure by tyre size (225/60R18 and others)

Planning cold pressures for sizes often seen on a SUV / crossover. This NX 450h+ sample opens with 225/60R18, then 255/50R20 and 245/55R19.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
225/60R18	35	35	2.41	2.41	241	241	Highway CUV
255/50R20	37	37	2.55	2.55	255	255	20-inch plus-size
245/55R19	36	36	2.48	2.48	248	248	Low-profile 19-inch
225/65R17	35	35	2.41	2.41	241	241	Very common 17-inch
235/60R18	36	36	2.48	2.48	248	248	Plus-size 18-inch
235/65R17	35	36	2.41	2.48	241	248	Mid-size SUV
215/70R16	34	34	2.34	2.34	234	234	Compact crossover
245/60R18	36	37	2.48	2.55	248	255	Heavier 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 NX 450h+

Park the Lexus NX 450h+ 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 NX 450h+ 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 NX 450h+.

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

Lexus notes

No special Lexus exception: the NX 450h+ 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 Lexus NX 450h+ 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.

A cheap gauge and a monthly habit will do more for this NX 450h+ than nitrogen upsells.

Other Lexus models

GX 460 GS 250 GS 450h IS 300 LBX LC 500h ES 300 LC 500

Questions about this NX 450h+

Is the sidewall number correct on a Lexus NX 450h+?

No. Sidewall PSI is a maximum. The NX 450h+ placard is the operating target, near 32-35/32-35 psi.

How often should I check a NX 450h+?

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

What tyre pressure should a Lexus NX 450h+ 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.

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.

When does TPMS warn on a Lexus NX 450h+?

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

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