4mm Terratrip Wheel Probe.
This probe is fitted to ‘look’ at the bolts securing the brake disc to the hub on a non-driven wheel, or prop shaft. All non-GPS tripmeters require a Terratrip probe.
The most popular probe fitted on a non driven wheel, to send data to the Tripmeter.
Suits all Terratrips.
Always wise to keep a spare one in your spares package!