Truck Tyre Replacement in Aichtal After a Mismatch Between the Stated and Fitted Sizes

On 21 April 2026, a transport company manager contacted the MT onroad dispatch team to report pressure loss in the left-hand tyre of a tractor unit. The vehicle was parked in a parking area in Aichtal, Baden-Württemberg, Germany. The photo of the damaged wheel showed a metal object in the upper part of the sidewall near the tread edge.

The transport company manager provided the vehicle details and confirmed the order. The driver remained with the vehicle and acted as the technician's on-site contact. The following information and photos were sent via WhatsApp:

• Vehicle: tractor unit;
• Side: left;
• Tyre size stated by the customer: 315/70 R22.5;
• Location: parking area in Aichtal, Baden-Württemberg, Germany;
• Tractor unit registration details;
• Driver's phone number;
• Photos of the damaged wheel.

The transport company manager obtained the size 315/70 R22.5 from the vehicle documents. In the photos provided, the sidewall marking on the tyre actually fitted was not readable. After checking the information, the MT onroad dispatch team prepared the call-out terms for the mobile truck tyre service. The order covered:

• call-out to the vehicle;
• delivery of a replacement tyre;
• on-site fitting;
• disposal of the damaged tyre;
• return journey of the service team.

The transport company manager confirmed the order and the payment guarantee. MT onroad logged the job, forwarded it to the service team and provided the customer with an estimated arrival time.

After visually inspecting the damaged wheel, the technician found that the size provided did not match the fitted size. The tractor unit had a 385/65 R22.5 tyre on the left-hand side of the steer axle, not the stated 315/70 R22.5. The technician remotely checked whether the required size was in stock. The customer then approved a second call-out and made an additional payment for it. The same technician returned with a replacement in the required size and fitted it on site.

Result

Although a second call-out was required, the job did not have to be reassigned to another service team. After the 385/65 R22.5 tyre had been fitted, the tractor unit continued its journey.

Case details

Parameter	Fact
Service	Mobile truck tyre service
Location	Parking area in Aichtal, Baden-Württemberg, Germany
Vehicle	Tractor unit
Points of contact	Transport company manager and driver
Damage	Metal object in the upper sidewall near the tread, pressure loss
Axle and side	Left-hand side of the steer axle
Size stated by the customer	315/70 R22.5, taken from the vehicle documents
Size actually fitted	385/65 R22.5
Order terms	Order confirmation and payment guarantee before the service team was dispatched
Case-specific detail	Second call-out due to a mismatch between the stated and fitted sizes
Result	The replacement was completed, and the tractor unit continued its journey

Confidentiality notice. The public version of this case does not disclose the name of the customer company, the vehicle registration number, the exact address of the parking area, phone numbers, payment details or the personal data of those involved.

How to provide the correct tyre size before the service team is dispatched

The size must be read directly from the sidewall of the tyre fitted to the wheel the technician will be working on. The vehicle documents alone are not sufficient, as they may list a different size from the one fitted on the relevant axle. Find the marking made up of numbers and letters, for example 385/65 R22.5, and send MT onroad a clear photo of the sidewall together with a full view of the wheel and a close-up of the damage. If the marking is dirty or difficult to read, wipe the accessible part of the sidewall and take several photos from different angles. Do not move the truck with a flat solely to take a photo. In the WhatsApp message, also provide the vehicle location, vehicle type, affected axle and side, and the condition of the rim. Using these details, the MT onroad dispatcher will check whether a call-out can be arranged, prepare the service terms and organise the mobile truck tyre service.