Dutton · Sierra Series 1 · Recommended

Dutton Sierra Series 1 recommended cold inflation

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

psi

34 / 34

Catalogue mid-points, front / rear · 2.2-2.4 / 2.2-2.4 bar

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

Treat this page as a map of the Sierra Series 1 band. The legal setpoint is the printed door-pillar label for your VIN. Under-inflation cooks the shoulders of a Sierra Series 1; over-inflation wears the centre rib and bangs every cat’s eye. Commercial and load-biased bodies like this pickup / double-cab often need a higher rear; LT or C-type sizes such as LT265/70R17 are not filled like a Fiesta.

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.

Dutton Sierra Series 1 placard versus sidewall

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

Estimated pressure by tyre size (235/75R15 and others)

235/75R15 is the first planning size here. LT265/70R17 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
235/75R15	35	37	2.41	2.55	241	255	Older compact truck
275/65R18	37	40	2.55	2.76	255	276	Plus-size 18-inch
LT265/70R17	42	48	2.9	3.31	290	331	LT 17-inch
255/65R17	37	39	2.55	2.69	255	269	Highway 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
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

PSI, bar and kPa

PSI-led conversions for the Dutton Sierra Series 1 band (32-35 / 32-35).

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

Pressure against load

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	37 psi / 2.55 bar

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

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

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.

What PSI if I plus-size toward LT265/70R17?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 235/75R15, 275/65R18 and LT265/70R17 as a planning band.

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.

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.

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