If you’ve ever had to replace your tyres, you’ll already be familiar with the various markings found on the sidewall. But what about the coloured dots that are found exclusively on brand new, factory-fresh tyres? Are these a remnant of the manufacturing process, or do they tell us something important about the tyre’s design and fitment?
Deciphering the Coloured Dots on New Tyres
Many new tyres on the market are adorned with a red dot and a yellow dot. These dots are important – but the first thing to understand is that they’re not there for driver attention. Rather, these coloured dots provide important information about the tyre’s construction to fitting specialists and technicians.
Each of these coloured dots has its own reference, with the yellow dot relating to the weight and balance of the tyre while the red dot is connected to the roundness and the joining points of the tyre’s layers and materials.
Understanding the Yellow Dot
First to the yellow dot. This dot is placed at the point of the tyre which is deemed the lightest point – that is, the part of the tyre with the lowest mass as a result of manufacturing and construction.
Being able to finitely identify this lightest point is beneficial when fitting the tyre to the wheel, as mechanics can align the yellow dot with the valve stem of the wheel. This creates a balance of weight, by adding the heavier valve stem to the lightest point of the tyre – thereby supporting a smoother and more balanced driving experience on the road.
Understanding the Red Dot
The red dot, meanwhile, considers the shape of the tyre. It is placed at the exact point where the tyre belt layers are joined and so what would otherwise be a perfect circle is knocked slightly out of kilter and position.
This point, known as the ‘highest point’ of the tyre, should ideally be aligned with the lowest point of the wheel to ensure balance and to minimise the risk of vibrations and excess road noise when driving.
What Do Drivers Need to Know About Red and Yellow Dots?
A basic understanding of these dots and what they mean / stand for is generally enough for most drivers. The information that these dots provide is mostly used by tyre fitters to ensure clean and well-balanced alignment of the tyre on the wheel – optimising the driving experience and reducing the need for extra wheel weights and balancing tools.
Of course, over time and with continued use, these dots may wear off your tyre. If the dots have worn away but your tyre needs to be removed for repair and then refitted to the wheel, your mechanic or fitment specialist will still be able to balance the tyre without the colours.
The red and yellow dots are simply aids that make the process easier.
We hope this helps you to feel even more in-the-know and informed the next time you go to buy brand new tyres and wonder what all the different markings mean.
