MINI · Cooper Roadster · Rear

MINI Cooper 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

Loaded Cooper Roadster 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 Cooper Roadster; over-inflation wears the centre rib and bangs every cat’s eye.

MINI Cooper Roadster placard versus sidewall

Sidewall PSI is a carcass maximum. Recommended operating pressure for this Cooper Roadster is the pillar sticker, near 34/34 psi.

Estimated pressure by tyre size (205/60R16 and others)

205/60R16 is the first planning size here. 225/40R18 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
205/60R16	—	34	—	2.34	—	234	Taller 16-inch
225/45R17	—	35	—	2.41	—	241	Sport 17-inch
225/40R18	—	36	—	2.48	—	248	Low-profile 18-inch
225/50R17	—	35	—	2.41	—	241	Touring 17-inch
205/55R16	—	34	—	2.34	—	234	Typical mid-compact OEM
215/50R17	—	35	—	2.41	—	241	Plus-size 17-inch
185/65R15	—	33	—	2.28	—	228	Small / older car
245/40R18	—	36	—	2.48	—	248	Wide touring 18-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	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 Cooper Roadster.

How to set the Cooper Roadster

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

MINI notes

MINI run-flats ride harshly if you overshoot. Stay in the printed band on this Cooper Roadster.

Spare and inflator kit

A matching full-size spare on the MINI Cooper 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.

If the MINI sticker and this page disagree, the sticker wins.

Other MINI models

Cooper D Clubman Cooper D Coupe Cooper D Cooper Paceman Cooper D Countryman Cooper Countryman Cooper E Clubvan

Questions about this Cooper Roadster

What is that in bar and kPa for the Cooper Roadster?

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

What tyre pressure should a MINI Cooper 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.

What PSI if I plus-size toward 225/40R18?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 205/60R16, 225/45R17 and 225/40R18 as a planning band.

How often should I check a Cooper Roadster?

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

Is the sidewall number correct on a MINI Cooper Roadster?

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

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