Tazzari EV · EM1 Anniversary · Bar

Recommended bar for a Tazzari EV EM1 Anniversary

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

bar

2.31 / 2.31

32-35 / 32-35 psi · 231 / 231 kPa

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

2.3 bar is not 23 psi. On this EM1 Anniversary 2.2-2.4 bar converts to about 32-35 psi. Use the table, not a guess. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed Tazzari EV tyre. Battery mass on this {make} {model} makes a 4 psi-low tyre cost range as well as heat.

Bar, PSI and kPa

Bar-led conversions around the Tazzari EV EM1 Anniversary. 2.2-2.4 bar is not “32-35 divided by ten”.

Bar	PSI	kPa
2.07	30	207
2.21	32	221
2.28	33	228
2.31	33.5	231
2.41	35	241
2.48	36	248
2.62	38	262
2.76	40	276
3.03	44	303
3.45	50	345
4.14	60	414

Tazzari EV EM1 Anniversary 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 (225/45R17 and others)

Planning cold pressures for sizes often seen on a passenger car. This EM1 Anniversary sample opens with 225/45R17, then 205/60R16 and 255/40R19.

Tyre size	Front PSI	Rear PSI	Front bar	Rear bar	Front kPa	Rear kPa	Note
225/45R17	35	35	2.41	2.41	241	241	Sport 17-inch
205/60R16	34	34	2.34	2.34	234	234	Taller 16-inch
255/40R19	37	37	2.55	2.55	255	255	EV 19-inch aero wheel
215/55R16	34	35	2.34	2.41	234	241	Slightly wider 16-inch
185/65R15	33	33	2.28	2.28	228	228	Small / older car
225/50R17	35	35	2.41	2.41	241	241	Touring 17-inch
195/65R15	34	34	2.34	2.34	234	234	Very common compact
225/40R18	36	36	2.48	2.48	248	248	Low-profile 18-inch

Load notes

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	37 psi / 2.55 bar

How to set the EM1 Anniversary

Measure before the school run, not after the M25.
Write LF / RF / RR / RL. Do not keep EM1 Anniversary 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.

Temperature drift

Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this EM1 Anniversary.

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 EM1 Anniversary 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 EM1 Anniversary 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 EM1 Anniversary than nitrogen upsells.

Other Tazzari EV models

Zero Special Edition Zero EM2 Zero Evo Zero Junior Zero EM1 Zero City Zero Classic Zero SE

Questions about this EM1 Anniversary

What PSI if I plus-size toward 255/40R19?

Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 225/45R17, 205/60R16 and 255/40R19 as a planning band.

When does TPMS warn on a Tazzari EV EM1 Anniversary?

Direct TPMS typically flags about 25% below placard — near 25 psi on this row. Fill to the sticker, not to the lamp.

How often should I check a EM1 Anniversary?

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.

Is the sidewall number correct on a Tazzari EV EM1 Anniversary?

No. Sidewall PSI is a maximum. The EM1 Anniversary placard is the operating target, near 32-35/32-35 psi.

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