Vespa / Piaggio TPMS: fits the valve, not the badge Vespa and Piaggio scooters are tubeless and take a cap sensor, but the small wheel and short valve leave less room than a motorcycle. Measure before promising.

The sensor, in numbers

Item	Value
Radio	2.4 GHz BLE 5.1 - no receiver, no wiring
Pressure range	0–500 kPa gauge (0–600 kPa absolute)
Accuracy	±2 kPa
Battery	CR1632, about 1.5 years at the default reporting interval
Sealing	IP67
Body	diameter 21 mm × 16 mm, 20 g (sensor body, without the tee)
What it needs	a phone (iOS or Android) - the phone is the gauge

Which valve you are dealing with

Fitment is a valve question first, a vehicle question second. Three cases cover almost every two-wheeler:

• Rubber snap-in valve on a tubeless wheel - the most common case. The sensor is a valve-stem cap: it screws onto the existing stem and nothing on the wheel changes.
• Metal clamp-in valve - common on larger or performance wheels. It also takes the cap sensor; check that the cap has clearance inside the rim.
• Tube-type wheel - a spoked wheel with an inner tube. A cap sensor reads the tube, not the air in the tyre directly, so readings react more slowly; the honest answer is that the wheel wants a different mounting, and it is worth asking before ordering.

What to check before ordering

• Rim clearance - with the sensor on the valve, does it clear the brake caliper and the fork at full travel?
• Valve condition - a cracked or bent stem leaks; replace it first, then fit.
• Wheel balance - 20 g on one side matters at sustained speed on a light motorcycle; on a scooter it usually does not.
• Pressure range - our range is 0–500 kPa gauge. Most two-wheeler tyres run well below that; the ceiling matters for air-shaft and industrial use, not for road tyres.

What the rider sees

Pressure and temperature per wheel on the phone, with the sensor's own battery state. The point is not a dashboard: it is seeing a slow leak before it becomes a roadside stop, and a temperature rise on a long climb before it becomes a tyre.