Step 2 — The Casing Is Built
The Skeleton That Gives the Tyre Its Shape.
The casing is the structural layer of the tyre — the woven fabric that holds everything together under pressure. Nylon threads are laid in precise angles and counts. The TPI (threads per inch) of the casing determines how the finished tyre will feel: lower TPI gives a firm, durable construction; higher TPI gives a finer, more supple ride. Where the tyre will be tubeless, the casing construction is adapted to hold an airtight seal without a tube.