The inspection should cover the complete wheel assembly, not just the screw, nail or other object in the tread. The technician checks the tread, both sidewalls, valve, bead and rim for cuts, distortion, corrosion or impact marks. A small penetration in the central tread may be suitable for repair, whereas damage near the shoulder or sidewall often means replacement because those areas flex heavily under load. If the tyre has travelled while flat, it should be removed for an internal examination. Scuffing, separation, liner damage and heat marks may be hidden from a quick roadside check.
Pushing a plug into a casing without looking inside is an unsafe shortcut. It can stop visible air loss while leaving internal damage undiscovered. Once the repair is judged suitable, the technician should use the correct repair method and check the completed work for leakage. Inflation pressure also needs careful attention. The correct figure depends on the tyre, axle load and operating conditions, so the vehicle information or tyre maker’s guidance should be consulted rather than relying on appearance. A calibrated gauge gives a more dependable reading, particularly after the tyre has cooled.
Underinflation allows greater flexing and heat build-up, while excessive pressure can reduce the tread contact area and make impacts harsher. A regional truck making frequent stops may lose time through a slow valve-core leak that looks less dramatic than a puncture. After inflation, the valve, cap and bead should be checked rather than assuming the tread was the source. A practical habit is to note the pressure and repair details on the job sheet before the truck leaves. That record helps the next technician identify a recurring leak instead of repeating the same inspection from scratch.
Uneven wear needs a wider diagnosis. Suppose a light truck arrives with noticeably more rubber missing from one shoulder of a steer tyre. Fitting a replacement without investigating may leave the new tyre exposed to the same damage. Shoulder wear can be associated with incorrect pressure, wheel misalignment, worn steering or suspension parts, or an imbalance in the wheel assembly. The pattern should be recorded and the wheel, steering and suspension checked as appropriate. Tread wear describes how rubber has been removed, not simply how old the tyre is. The replacement must suit the axle position and expected duty.
Load rating states the weight a tyre is designed to carry at a specified pressure. It should not be treated as a rough guide, particularly on trucks carrying dense freight or equipment. A suitable replacement must match the vehicle’s requirements, wheel dimensions, construction and speed capability, while also fitting the route and payload. Long-distance work, regional running and urban delivery can place different demands on tread life, casing strength and steering response. A tyre that fits the rim may still be unsuitable for the axle. Route details and the manufacturer’s data are useful checks before ordering a mobile truck tyre repair.
Fitting is not complete until the bead sits evenly against a clean, sound rim. Dirt, corrosion or damage at that sealing surface can cause a leak even if the casing itself is undamaged. Wheel nuts should be tightened in the specified sequence and to the vehicle maker’s torque, using suitable tools rather than guesswork. The final check covers pressure, valve caps, fresh sidewall damage, tread condition and any required rotation direction. The driver should report vibration, pulling or renewed pressure loss promptly. Keeping the inspection record alongside the vehicle’s service documents also supports sensible decisions about the next truck tyre range.
