POLINI ABS Sensor Wheel Set (Z=44) for Vespa GTS 310 Euro 5+

ABS Sensor Ring Set POLINI Z=44 – Vespa GTS and GTV Euro 5+ – Front and Rear

Twice 44 windows, one perfectly matched system: with the POLINI Z=44 tone wheel set, the front and rear wheels receive the matching performance configuration together. The set has been specifically developed for Vespa GTS and GTV Euro 5+ and combines two differently designed ABS sensor rings with an identical number of windows. POLINI therefore provides the complete solution for both wheels in one set.

This is particularly important on current Euro 5+ models. Here, the front and rear wheels must operate with a matching number of windows. Instead of having to combine individual components, POLINI part number 290.0301 provides a coordinated package for the complete conversion.

44 plus 44 – performance as a complete system

The tone wheels act as pulse generators for the ABS sensors. As the wheels rotate, the rectangular windows pass the sensors. The vehicle electronics use these pulses to determine the respective wheel speeds and use this information for systems including ABS, ASR and vehicle speed detection.

Both POLINI tone wheels feature 44 precisely arranged windows each. This means the front and rear wheels operate with the same number of pulses – the crucial difference compared with a solution in which only the rear sensor ring is changed on a Euro 5+ vehicle.

The consistent Z=44 solution for Euro 5+

Anyone converting a current Vespa to Z=44 should consider the vehicle as a complete system. This is exactly where the POLINI set shows its strength: the front and rear tone wheels are replaced together and are directly matched in terms of their number of windows.

This makes the set the consistent solution for Euro 5+ models where a Z=44 configuration requires not only the rear wheel but also the front wheel to be equipped with a sensor ring featuring the same number of windows.

Unlock more actual speed intelligently

The Z=44 configuration does not target engine power itself, but the electronic detection of wheel speed. Powerful Vespa GTS models in particular may already have sufficient performance reserves, while the electronic speed limitation can be reached comparatively early due to the speed detected by the system.

The modified signal detection can bring the indicated speed closer to the actual road speed. As a result, the range relevant to the electronic speed limitation can be reached at a higher actual speed.

Performance without additional engine load

The fascinating aspect of this concept is that the engine itself does not need to be opened or internally modified to achieve the effect. Cylinder, piston, valve train and fuel injection remain untouched. The modification works through signal detection at the wheels, and the tone wheels themselves do not create any additional mechanical load on the internal engine components.

The actual achievable top speed continues to depend on engine power, variator setup, rider weight, road conditions, wind and other factors. The system does not generate additional engine power, but can help make better use of performance reserves that are already available.

Two tone wheels – two specific geometries

The product images clearly show the structural differences between the two sensor rings. The set does not consist of two identical rings: the front and rear tone wheels each feature a contour and mounting geometry specifically designed for their respective installation position. What they share is the surrounding ring of 44 rectangular sensor windows.

The consistent silver finish and precisely cut contours give both components a technical, uncompromisingly functional appearance. The required mounting screws are also included in the set.

• Complete POLINI ABS sensor ring set for front and rear wheels
• Z=44 with 44 sensor windows each at the front and rear
• Matched solution specifically for Euro 5+ vehicles
• Front and rear tone wheels with position-specific geometry
• Designed for use with the original ABS sensors
• Mounting screws included
• POLINI part number 290.0301 – Made in Italy

Completely reversible

The Z=44 conversion remains fully reversible. Reinstalling the standard tone wheels at the front and rear allows the vehicle to be returned to its original configuration. The POLINI set therefore remains a targeted technical modification without permanently altering the mechanical components of the engine.

Recalibrate the ASR after conversion

After replacing the tone wheels, the ASR must be recalibrated on appropriately equipped vehicles. This adapts the vehicle electronics to the modified configuration and ensures that the conversion is completed correctly from a technical perspective.

POLINI – when every signal counts

Performance is not only found in the cylinder, variator or exhaust. On a modern Vespa, electronics also determine how the available power can be used on the road. The POLINI Z=44 tone wheel set works precisely at this interface between mechanics and electronics: two precisely matched sensor rings, 44 windows at the front, 44 windows at the rear and genuine Italian racing know-how down to the smallest detail.

Note: No ABE/TÜV approval; use on public roads is only possible following individual approval where legally permitted.