Sigmavision Drive Over Thread Reader

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Product Ref: Drive Over

Price: €0.00

Drive Over Ramp Overview


The TreadReader Drive Over ramp is a fully automated tyre wear measurement system that can be configured for passenger cars and light commercial vehicles. Compact TreadReader laser sensors are housed in a surface mounted ramp with little or no groundworks or preparation to the road or workshop floor.

Sensors can also be integrated into other workshop equipment, e.g. lifts, wheel alignment machines, brake testing machines and vehicle inspection lanes.

The tyre passes over a pressure switch to trigger the measurement of a tyre patch approximately 50mm (3”) wide. Around 300,000 data points on the tyre patch ensure accurate and repeatable measurements, even if tyres are wet or dirty, with an accuracy of < 0.2mm or 0.008”.

The system is kept clean by the use of air knives and a shutter mechanism.

Download Product Brochure

Tyre Measurement Technology

The patented TreadReader tyre measurement technology creates a detailed 3D scan of each tyre, constructed from 300,000 measurement points, with an accuracy of < 0.2mm or 0.008”.

By scanning the full width of the tyre and 50mm around the tyre, TreadreaderTMdevices far surpass the accuracy and reliability of traditional dip gauges and non-contact ‘laser pointer’ measurement devices.

Advanced software algorithms produce detailed 3-dimensional tyre tread images which show the condition of the tyre tread with absolute clarity.

When presented to a vehicle owner, TreadReader scans immediately convey tyre condition and remove any perceived barriers to tyre replacement should tread depth be insufficient or illegal.

Click and Drag Click and drag to explore the 3D tyre measurement scan

Usage and Functionality


Tread depth measurement occurs as the vehicle drives over the ramp and the tyres pass over a pressure switch on the leading edge of each ramp. This also triggers the opening of the shutter above the sensors.

At the same time, air knives are activated to clean the laser scanning sensors mounted inside the ramps. A maximum continuous vehicle speed of 8mph is permitted.

3D tyre scans are captured and communicated over Ethernet to the PC. A software license is provided to run TreadReader™ software on the PC. The software analyses tyre scans and calculates tread depth.

The 3D tyre scan images, tread depth measurements and operator recommendations are then displayed on the PC. Additional narratives can also be provided when edge wear is detected.

Product Specification

Ramp dimensions (L x W x H) 1.38m x 0.61m x 0.08m ≈ 4.5’ x 2’ x 3.1”
Total footprint (L x W) 1.38m x 2.09m ≈ 4.5’ x 6.8’
Maximum scan width 2 x scan zones of 600mm ≈ 23.6”
Arc length viewed (min) 35-50mm ≈ 1.4-2”
Measurement accuracy < 0.2mm
Directional Measures leading edge of the tyre
Maximum vehicle speed 6.5-13 km/h ≈ 4-8 mph
Cycle time within permitted speed range Approx 10 secs (from front axle of 1st car to front axle of 
next car including display of scans and measurements)
Power Mains (230VAC, 5A) for PC and touch screen 12VDC, 2A for roll-over ramp
Measurement trigger Pressure switch
Maximum axle weight 1,500Kg
Environmental protection Shutter + air knives (compressed air supply required, if portable >100L, >10CFM)
Environmental rating IP67 min
Operating temperature range 0°C - 50°C ≈ 32°F - 122°F
Communication Ethernet
Data outputs 3D tyre scans and tread depths
Software license Windows 7 or later / security key protected

Product Comparison

TreadReader Drive Over
Produces detailed 3D tread depth scan
Integrates with garage management system
Produces operator report incorporating vehicle ID and colour coded tread depth indicators
Fully automatic system with no operator intervention
Surface mounted and best suited to service drive applications
Suitable for service bay, mobile and roadside applications
Provides accurate reading even for wet or dirty tyres