B-G Racing Digital Tyre Tread Depth Gauge | Tyre Wear Tool

The B-G Racing Digital Tyre Tread Depth Gauge helps racers, engineers and track-day drivers turn tyre wear into useful setup data. Take quick, repeatable readings across the tyre, compare wear patterns and make better decisions about tyre management, race strategy and replacement timing. Digital readings are available in both metric and imperial units, making this a practical tyre tread gauge for race teams, workshops, performance cars and club-level motorsport.

A customer is not buying another tool to leave in the toolbox. They are buying a clearer view of what the tyres are doing between sessions. Measuring tread depth at consistent points can help you spot developing wear, compare the inside, centre and outside of the tyre, and record how a tyre changes through a race weekend.

Why racers measure tyre tread depth

Tyre tread depth is more than a simple wear check. It is one piece of the information used to understand how a car is using its tyres. Regular measurements can help you:

• Track tyre degradation over practice sessions, qualifying and race stints
• Compare left-to-right and inside-to-outside wear across an axle
• Identify wear patterns that may justify checking alignment, camber, pressure or driving conditions
• Assess whether a setup change is producing a more consistent contact patch
• Plan tyre replacement before wear becomes a problem during an event
• Build a repeatable tyre-management record for endurance racing and testing
• Reduce unnecessary tyre purchases by making decisions from recorded measurements

For endurance racing, rally, circuit racing, track days and club motorsport, a simple tread-depth record can add useful context to tyre pressures, temperatures, lap times and driver feedback. Measure the same points each time, record the tyre position and compare readings rather than relying on a single measurement.

What this digital tread depth tester helps you check

Use the gauge to investigate common tyre-wear questions, including:

• Is one edge wearing faster than the rest of the tyre?
• Are the tyres on one side of the car degrading differently from the other side?
• Is the available tread changing consistently through an event?
• Does a wear pattern suggest that alignment, camber or pressure should be reviewed?
• Is there enough remaining tread for the next session, subject to the tyre manufacturer's guidance and applicable rules?

The gauge does not measure tyre pressure or temperature. For a more complete tyre-management picture, pair tread-depth readings with suitable pressure and temperature instruments.

Motorsport applications

This compact measuring tool suits circuit racing, GT racing, endurance racing, rally cars, drift cars, time attack, speedway, karting, club motorsport, track days, race-driver coaching and motorsport workshops. It is useful wherever consistent tyre wear information supports safer preparation, better setup conversations and more predictable event planning.

Key features

• Digital readout for quick tread-depth readings in metric and imperial units
• Repeatable checks across multiple points on a tyre
• Compact and lightweight for a race-car kit bag, workshop drawer or toolbox
• Broad application across race tyres, road tyres and performance-car tyres

Used by a motorsport-focused team

At Harris Race Radios, we treat measurement as part of proper race-car preparation. Aaron Harris's experience as a professional race driver, race engineer and endurance competitor informs the way we look at tyre data, while Rex Harris brings more than 50 years of motorsport engineering experience. We use tread-depth information alongside other setup observations to help identify developing wear patterns and support more informed decisions between sessions.

Harris Race Radios is the B-G Racing supplier with NZ stock and shipping available to Australia, serving customers across New Zealand and Australia. Read Aaron's full motorsport career.

Frequently asked questions

How accurate is the gauge?
The gauge provides digital readings in metric and imperial units and is designed for quick, repeatable tread-depth checks. The current product information does not state a manufacturer accuracy tolerance, so use the same technique and measurement points when comparing tyres.

Can I use it on slick racing tyres?
Slick tyres do not have conventional tread grooves. If you are checking a slick or a tyre with a manufacturer's wear indicator, follow the tyre manufacturer's recommended wear-checking method and any relevant competition requirements.

Can it be used for a WOF inspection?
It can help take a tread-depth reading, but it is not a substitute for an authorised WOF inspection. WOF decisions must follow the current New Zealand requirements and be made by the authorised inspector.

Can it measure tyre wear over multiple events?
Yes. Take readings at the same marked or repeatable points, record the tyre position and date, and compare the results over time. This turns individual measurements into a useful wear history.

How should tread depth be recorded across a race weekend?
Record the tyre position, session or stint, measurement points and reading units. Comparing inside, centre and outside readings helps show whether wear is even or concentrated at one part of the tyre.

Why use a digital gauge instead of a manual tread gauge?
A digital display makes readings easy to read and provides metric and imperial units. The biggest benefit comes from using a consistent method and recording the results, regardless of the gauge style.

Does tread depth identify tyre-pressure problems?
It can reveal wear patterns that justify checking tyre pressure or setup, but the gauge itself does not measure pressure. Use a dedicated tyre pressure gauge when pressure data is required.

Part of a complete tyre-management setup

For a more complete picture, combine tread-depth measurements with a dedicated tyre pressure gauge, tyre temperature or pyrometer readings, and broader race-car setup checks. Use this tool alongside professional motorsport wheel alignment and car setup equipment. Browse the full motorsport alignment equipment collection for tools that support repeatable race-car preparation.

Compare the Full Motorsport Tyre Pressure Gauge Range

This gauge is part of our complete tyre pressure and temperature range. Compare digital and analogue gauges, pyrometer versions and loggers from B-G Racing, Alfano, Prisma Electronics and RaceSense in one place:

• Shop all Motorsport Tyre Pressure Gauges
• Tyre & Setup Tools — gauges, pyrometers, alignment and setup equipment

Not sure which gauge suits your series or category? Talk to our race engineers — we use these tools in our own race cars and karts.