Julia Blake, marketing director at Supertracker, is encouraging technicians to spot the diagnostic clues hidden in plain sight on tyres.
Like a black box recording a flight’s every twist and turn, a car’s tyres also act as a record and not only of twists and turns. Reading that record and acting accordingly is an essential skill for every technician. Long before a warning light appears on a customer’s dashboard, the evidence of a vehicle’s underlying problem is often already available to see and feel in the tyre’s tread.
At Supertracker, we spend a lot of time working with workshops that are diagnosing alignment and suspension issues and one thing we can say is that the tyre isn’t usually the problem: It’s the clue.
Don’t just look: Feel
An often-overlooked aspect of tyre inspection is that some wear patterns are easier to feel than they are to see. Inner-edge wear is regularly missed because it sits underneath the vehicle and isn’t visible during a quick walk-around inspection. Feathering often becomes obvious to the hand before it becomes obvious to the eye.
That’s why one of the simplest habits technicians can adopt is to physically run their hand across the tread. A feathered tyre will feel smooth in one direction and sharp in the other. Cupping will feel like a series of dips and high spots around the tyre.
Not every wear pattern points to alignment
Not every unevenly worn tyre needs an alignment check.
Both shoulders worn with a healthy centre tread often point to under-inflation. A worn centre section typically suggests over-inflation.
Neither issue is something wheel alignment equipment can correct.
The first question should always be whether tyre pressures are correct. Pressure faults are incredibly common and can often mimic alignment-related wear. Ruling out the simple causes first saves time and helps workshops reach the correct diagnosis more quickly.
When alignment isn’t the root cause
Of all tyre wear patterns, cupping is one of the most commonly misdiagnosed.
The distinctive series of dips and high spots around the tread is frequently blamed on alignment when the underlying cause is often worn dampers, ride-control components, imbalance or excessive wheel movement—an alignment adjustment alone is unlikely to resolve the problem.
Recognising the difference is important because it prevents workshops from recommending corrective work that will not address the root cause.
Sometimes the fault starts at the rear
Another diagnostic trap occurs when technicians see different wear patterns across the front axle. One front tyre may be wearing heavily on the inside edge while the opposite tyre wears on the outside. At first glance, it appears to be a front-end issue but in reality, the cause may sit at the rear of the vehicle.
A rear thrust angle outside specification can effectively steer the vehicle from behind, creating uneven loading across the steer axle. Identifying this requires a full four-wheel measurement rather than a front-only check.
Turning clues into confidence
Tyre wear should never be treated as a replacement conversation alone. It should be the beginning of a diagnostic process.
At Supertracker, we encourage workshops to follow a simple approach: Check tyre pressures; inspect steering and suspension components; measure alignment accurately; and confirm the repair with before-and-after data.
The wear pattern narrows the field and the measurement confirms the diagnosis.
The best workshops don’t guess. They use the clues the vehicle is giving them and back them up with accurate measurements. That’s what builds trust with customers and that’s what prevents unnecessary comebacks.
Every tyre tells a story. The question is whether we’re taking the time to read it.
