Dutton · Sierra Drop Head · PSI

Dutton Sierra Drop Head inflation in PSI (32-35 front, 32-35 rear)

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

PSI is the Imperial reading most UK motorists still see on garage hoses. For the Dutton Sierra Drop Head the catalogue row is 32-35 psi front and 32-35 psi rear. Size estimates on this page include LT265/70R17, 235/75R15 and 245/70R16 — interpolated from the catalogue midpoint, not a second factory sticker. Commercial and load-biased bodies like this pickup / double-cab often need a higher rear; LT or C-type sizes such as 245/70R16 are not filled like a Fiesta.

Dutton Sierra Drop Head placard versus sidewall

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

PSI, bar and kPa

PSI-led conversions for the Dutton Sierra Drop Head 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

Estimated pressure by tyre size (LT265/70R17 and others)

LT265/70R17 is the first planning size here. 245/70R16 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
LT265/70R17	42	48	2.9	3.31	290	331	LT 17-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
285/70R17	38	41	2.62	2.83	262	283	Wide all-terrain
275/65R18	37	40	2.55	2.76	255	276	Plus-size 18-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
265/70R17	37	39	2.55	2.69	255	269	Typical 17-inch load tyre

How to set the Sierra Drop Head

Park the Dutton Sierra Drop Head 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 rear-wheel drive Sierra Drop Head 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 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 Drop Head.

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 Drop Head 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 Drop Head 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

B Plus Sierra Series 3 Phaeton Series 3 Phaeton Series 1 Melos Rico Sierra Series 1 B Plus Series 2

Questions about this Sierra Drop Head

Front versus rear on the Dutton Sierra Drop Head?

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 Dutton Sierra Drop Head 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.

What PSI if I plus-size toward 245/70R16?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use LT265/70R17, 235/75R15 and 245/70R16 as a planning band.

How often should I check a Sierra Drop Head?

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

Is the sidewall number correct on a Dutton Sierra Drop Head?

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

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