ACM · Biagini Passo · Rear

ACM Biagini Passo rear tyres: 32-35 psi / 2.2-2.4 bar

Drivetrain: front-wheel drive
Body: passenger car
PSI F / R: 32-35 / 32-35
Bar F / R: 2.2-2.4 / 2.2-2.4

psi rear

2.31 bar · 231 kPa at the rear axle

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

Loaded Biagini Passo rears often need the sticker’s second column, not a copy of the front 32-35 psi figure. Under-inflation cooks the shoulders of a Biagini Passo; over-inflation wears the centre rib and bangs every cat’s eye.

ACM Biagini Passo placard versus sidewall

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

Estimated pressure by tyre size (245/40R18 and others)

If your ACM Biagini Passo no longer wears the OEM diameter, start at the row nearest 245/40R18 or 185/65R15 and confirm with the tyre maker’s load table.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
245/40R18	—	36	—	2.48	—	248	Wide touring 18-inch
185/65R15	—	33	—	2.28	—	228	Small / older car
225/50R17	—	35	—	2.41	—	241	Touring 17-inch
205/60R16	—	34	—	2.34	—	234	Taller 16-inch
215/55R16	—	35	—	2.41	—	241	Slightly wider 16-inch
215/50R17	—	35	—	2.41	—	241	Plus-size 17-inch
225/45R17	—	35	—	2.41	—	241	Sport 17-inch
205/55R16	—	34	—	2.34	—	234	Typical mid-compact OEM

Pressure against load

Load moves the rear of a passenger car 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	38 psi / 2.62 bar

A family passenger car with a boot full of luggage should use the laden rear figure if Ford, VW or Mercedes printed one. Otherwise the modest steps in the load table are only a sketch for this Biagini Passo.

How to set the Biagini Passo

Park the ACM Biagini Passo 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 front-wheel drive Biagini Passo is enough to feel a pull.
Refit valve caps and reset TPMS if the handbook asks for a relearn.

PSI, bar and kPa

PSI-led conversions for the ACM Biagini Passo 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

Temperature drift

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

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

ACM notes

No special ACM exception: the Biagini Passo 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 ACM Biagini Passo 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 Biagini Passo than nitrogen upsells.

Other ACM models

4 WD

Questions about this Biagini Passo

What PSI if I plus-size toward 225/50R17?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 245/40R18, 185/65R15 and 225/50R17 as a planning band.

How often should I check a Biagini Passo?

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

Front versus rear on the ACM Biagini Passo?

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.

When does TPMS warn on a ACM Biagini Passo?

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 ACM Biagini Passo?

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

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