Dutton · Sierra Series 1 · kPa

Dutton Sierra Series 1 tyre pressure in kPa

Drivetrain: rear-wheel drive
Body: pickup / double-cab
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 Dutton Sierra Series 1 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. Commercial and load-biased bodies like this pickup / double-cab often need a higher rear; LT or C-type sizes such as 235/75R15 are not filled like a Fiesta.

kPa, bar and PSI

kPa-led conversions. 220 kPa is 2.2 bar and about 32 psi — handy if this Sierra Series 1 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 (255/65R17 and others)

255/65R17 is the first planning size here. 235/75R15 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
255/65R17	37	39	2.55	2.69	255	269	Highway 17-inch
275/65R18	37	40	2.55	2.76	255	276	Plus-size 18-inch
235/75R15	35	37	2.41	2.55	241	255	Older compact truck
245/70R16	36	38	2.48	2.62	248	262	Common 16-inch all-terrain
265/70R17	37	39	2.55	2.69	255	269	Typical 17-inch load tyre
LT265/70R17	42	48	2.9	3.31	290	331	LT 17-inch
LT245/75R16	42	46	2.9	3.17	290	317	LT-metric, higher load
285/70R17	38	41	2.62	2.83	262	283	Wide all-terrain

Dutton Sierra Series 1 placard versus sidewall

The tyre-information placard on a Dutton Sierra Series 1 sits on the driver’s door pillar (sometimes the fuel-filler flap). Catalogue figures here are a general band: 32-35 / 32-35 psi.

Temperature drift

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

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 Sierra Series 1

Measure before the school run, not after the M25.
Write LF / RF / RR / RL. Do not keep Sierra Series 1 numbers in your head.
Add air in short bursts toward 34 psi (2.31 bar) front and 34 psi rear.
If one corner is 4 psi down, hunt for a nail before you blame the weather.
Log date, ambient temperature and the four readings.

Load notes

Load moves the rear of a pickup / double-cab 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
Payload / towing	35 psi / 2.41 bar	38 psi / 2.62 bar

Dutton notes

No special Dutton exception: the Sierra Series 1 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 Dutton Sierra Series 1 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 Dutton sticker and this page disagree, the sticker wins.

Other Dutton models

Cantera Legerra B Plus Series 2 Rico Shuttle Melos Phaeton Series 4 Sierra Drop Head B Type

Questions about this Sierra Series 1

What is that in bar and kPa for the Sierra Series 1?

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

When does TPMS warn on a Dutton Sierra Series 1?

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

Is the sidewall number correct on a Dutton Sierra Series 1?

No. Sidewall PSI is a maximum. The Sierra Series 1 placard is the operating target, near 32-35/32-35 psi.

How often should I check a Sierra Series 1?

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

What tyre pressure should a Dutton Sierra Series 1 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.

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