Oldtimer · Glas · Rear
Oldtimer Glas rear tyres: 32-35 psi / 2.2-2.4 bar
- Drivetrain
- front-wheel drive
- Body
- SUV / crossover
- PSI F / R
- 32-35 / 32-35
- Bar F / R
- 2.2-2.4 / 2.2-2.4
psi rear
34
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 Glas rears often need the sticker’s second column, not a copy of the front 32-35 psi figure. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed Oldtimer tyre.
Oldtimer Glas placard versus sidewall
The tyre-information placard on a Oldtimer Glas 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 (245/55R19 and others)
Planning cold pressures for sizes often seen on a SUV / crossover. This Glas sample opens with 245/55R19, then 255/50R20 and 235/60R18.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 245/55R19 | — | 36 | — | 2.48 | — | 248 | Low-profile 19-inch |
| 255/50R20 | — | 37 | — | 2.55 | — | 255 | 20-inch plus-size |
| 235/60R18 | — | 36 | — | 2.48 | — | 248 | Plus-size 18-inch |
| 225/60R18 | — | 35 | — | 2.41 | — | 241 | Highway CUV |
| 215/70R16 | — | 34 | — | 2.34 | — | 234 | Compact crossover |
| 235/65R17 | — | 36 | — | 2.48 | — | 248 | Mid-size SUV |
| 225/65R17 | — | 35 | — | 2.41 | — | 241 | Very common 17-inch |
| 245/60R18 | — | 37 | — | 2.55 | — | 255 | Heavier CUV |
Pressure against load
Load moves the rear of a SUV / crossover 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 SUV / crossover 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 Glas.
How to set the Glas
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep Glas 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 Glas 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 Glas.
| 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 Glas 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 Glas 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
Questions about this Glas
Front versus rear on the Oldtimer Glas?
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.
Is the sidewall number correct on a Oldtimer Glas?
No. Sidewall PSI is a maximum. The Glas placard is the operating target, near 32-35/32-35 psi.
What tyre pressure should a Oldtimer Glas 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.
When does TPMS warn on a Oldtimer Glas?
Direct TPMS typically flags about 25% below placard — near 25 psi on this row. Fill to the sticker, not to the lamp.
What PSI if I plus-size toward 235/60R18?
Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 245/55R19, 255/50R20 and 235/60R18 as a planning band.
Handbook: placard · bar vs PSI · front vs rear · cold inflation