Morgan · Roadster · Rear

Morgan Roadster 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

The rear of a passenger car takes passengers, luggage and, on vans, payload. Catalogue rear pressure on the Morgan Roadster is 32-35 psi / 2.2-2.4 bar. Size estimates on this page include 205/55R16, 225/45R17 and 215/55R16 — interpolated from the catalogue midpoint, not a second factory sticker.

Morgan Roadster placard versus sidewall

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

Estimated pressure by tyre size (205/55R16 and others)

Planning cold pressures for sizes often seen on a passenger car. This Roadster sample opens with 205/55R16, then 225/45R17 and 215/55R16.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
205/55R16	—	34	—	2.34	—	234	Typical mid-compact OEM
225/45R17	—	35	—	2.41	—	241	Sport 17-inch
215/55R16	—	35	—	2.41	—	241	Slightly wider 16-inch
205/60R16	—	34	—	2.34	—	234	Taller 16-inch
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
195/65R15	—	34	—	2.34	—	234	Very common compact

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	37 psi / 2.55 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 Roadster.

How to set the Roadster

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

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

Morgan notes

No special Morgan exception: the Roadster 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 Morgan Roadster 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.

Keep the Morgan Roadster on the printed band; use 205/55R16 and 215/55R16 only as a map for non-OEM wheels.

Other Morgan models

Aero Max Supersport Pedal Lifecar Plus 4 Supersport Aero Supersports Plus Six 100-Years-Special

Questions about this Roadster

How often should I check a Roadster?

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

What tyre pressure should a Morgan Roadster 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.

Is the sidewall number correct on a Morgan Roadster?

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

Front versus rear on the Morgan Roadster?

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.

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