Tazzari EV · Zero Junior · Front

Front axle PSI and bar on the Tazzari EV Zero Junior

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 front

2.31 bar · 231 kPa at the steering axle

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

A 3 psi miss on one front corner of this Zero Junior shows up as a wander before the TPMS lamp bothers you. Target 34 psi (2.31 bar) cold. Under-inflation cooks the shoulders of a Zero Junior; over-inflation wears the centre rib and bangs every cat’s eye. Battery mass on this {make} {model} makes a 4 psi-low tyre cost range as well as heat.

Tazzari EV Zero Junior placard versus sidewall

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

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

If your Tazzari EV Zero Junior no longer wears the OEM diameter, start at the row nearest 215/50R17 or 195/65R15 and confirm with the tyre maker’s load table.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
215/50R17	35	—	2.41	—	241	—	Plus-size 17-inch
195/65R15	34	—	2.34	—	234	—	Very common compact
185/65R15	33	—	2.28	—	228	—	Small / older car
255/40R19	37	—	2.55	—	255	—	EV 19-inch aero wheel
225/50R17	35	—	2.41	—	241	—	Touring 17-inch
245/40R18	36	—	2.48	—	248	—	Wide touring 18-inch
215/55R16	34	—	2.34	—	234	—	Slightly wider 16-inch
225/40R18	36	—	2.48	—	248	—	Low-profile 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	38 psi / 2.62 bar

Steering feel on the Zero Junior lives on this axle. Do not drop front pressure to “soften” a plus-size 185/65R15; you will roll the sidewall in a roundabout.

How to set the Zero Junior

Measure before the school run, not after the M25.
Write LF / RF / RR / RL. Do not keep Zero Junior 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 Tazzari EV Zero Junior 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 Zero Junior.

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

Tazzari EV notes

No special Tazzari EV exception: the Zero Junior 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 Tazzari EV Zero Junior 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 Zero Junior than nitrogen upsells.

Other Tazzari EV models

Zero SE Zero City Zero Evo Zero EM1 Zero Classic EM1 Citysport EM1 Anniversary Zero Speedster

Questions about this Zero Junior

Front versus rear on the Tazzari EV Zero Junior?

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.

How often should I check a Zero Junior?

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

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 PSI if I plus-size toward 185/65R15?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 215/50R17, 195/65R15 and 185/65R15 as a planning band.

What is that in bar and kPa for the Zero Junior?

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

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