Oldtimer · Hotchkiss · Rear

Oldtimer Hotchkiss rear tyre pressure

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

The rear of a passenger car takes passengers, luggage and, on vans, payload. Catalogue rear pressure on the Oldtimer Hotchkiss is 32-35 psi / 2.2-2.4 bar. Size estimates on this page include 215/50R17, 225/50R17 and 225/45R17 — interpolated from the catalogue midpoint, not a second factory sticker.

Oldtimer Hotchkiss placard versus sidewall

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

Estimated pressure by tyre size (215/50R17 and others)

Planning cold pressures for sizes often seen on a passenger car. This Hotchkiss sample opens with 215/50R17, then 225/50R17 and 225/45R17.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
215/50R17	—	35	—	2.41	—	241	Plus-size 17-inch
225/50R17	—	35	—	2.41	—	241	Touring 17-inch
225/45R17	—	35	—	2.41	—	241	Sport 17-inch
225/40R18	—	36	—	2.48	—	248	Low-profile 18-inch
195/65R15	—	34	—	2.34	—	234	Very common compact
215/55R16	—	35	—	2.41	—	241	Slightly wider 16-inch
205/55R16	—	34	—	2.34	—	234	Typical mid-compact OEM
205/60R16	—	34	—	2.34	—	234	Taller 16-inch

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	35 psi / 2.41 bar	36 psi / 2.48 bar
Motorway + luggage	36 psi / 2.48 bar	36 psi / 2.48 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 Hotchkiss.

How to set the Hotchkiss

Measure before the school run, not after the M25.
Write LF / RF / RR / RL. Do not keep Hotchkiss 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.

PSI, bar and kPa

PSI-led conversions for the Oldtimer Hotchkiss 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 Hotchkiss.

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

Oldtimer notes

No special Oldtimer exception: the Hotchkiss 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 Oldtimer Hotchkiss 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 Oldtimer sticker and this page disagree, the sticker wins.

Other Oldtimer models

Adler ASC Auburn Alfa Romeo Barkas AC Allard Armstrong Siddeley

Questions about this Hotchkiss

What is that in bar and kPa for the Hotchkiss?

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

When does TPMS warn on a Oldtimer Hotchkiss?

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 Oldtimer Hotchkiss?

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

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.

What tyre pressure should a Oldtimer Hotchkiss 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