- Casing - This is the flexible body of the tyre that comes in various threads per inch (TPI). This is the main body of the tyre which is then covered in rubber. This is normally made from nylon.
- Protection layer - To provide puncture protection, different manufacturers will use various types of material as a lining underneath the tread.
- Tread - The rubber compound that comes in contact with the road surface.
- Bead - The ridged stem around the edge of the tyre that locks the it to the wheel rim. This is made from either wire or foldable Kevlar.
- Anti-chafing strip - Supporting strip that protects the bead.
Checking your tyres on a regular basis is important to reduce the chance of repeated flats whilst out on the road and increase your safety.
For the most effective inspection of your tyres wear, it is advised that you take the tyre completely off the rim itself. This means you can fully check the tyres tread, sidewalls, bead and on the inside surface of the tyre for wear and debris that could potentially cause a puncture or further wear to the tyre.
The tread of the tyre is the rubber compound that comes in direct contact with the road surface – this means the tread is made out of a more durable compound as it comes in for the most amount of abuse. The tread can show the first sign of wear as it is in constant contact with concrete so checking it on a regular basis is a good idea.
Once you have taken the tyre off the rim, examine closely the tread on the outside of the tyre without forgetting about the inside. A good way of doing this is to run your finger carefully along the inside and outside of the tread checking for intruding debris. Look out for certain points that may have exaggerated wear caused by skidding – this will show wear that is inconsistent with the rest of tyre and could mean that it will need to be replaced.
As the bead of the tyre is made out of either wire or foldable Kevlar, it is normally quite resistant to damage or wear. However, hitting a pot-hole or a pavement curb can cause damage, and normally when the bead gets damaged, it’s time for a new tyre. This is because the bead is used to hook the tyre onto the rim, so if there is any damage, then the tyre will not attach correctly.