Iveco DAILY M.Y. 2012, Body Builder Instructions

Page: 79 / 252

CHASSIS MODIFICATIONS
2-53
D
AILY
Printed 603.95.241 Base — 02/2012
Changing tyre size
Changing tyre size
2.14 Changing tyre size
The replacement of the tyres with others of a different size or load capacity in comparison to what
was foreseen during vehicle approval requires IVECO authorisation and verification of the need to
reprogram braking system management. NOTE
The vehicle must be presented to the competent department for checking the replacement and for updating the registration
documents.
Using larger tyres:
- requires checking the dimensions with respect to the mechanical components, wheel arches, etc. in the various dynamic, steering
and jolting conditions;
- in some cases, this may require checking the length of the fastening screws;
- may involve replacing the rim and as a result verification of the need to adjust the spare wheel support;
- may influence the distance off the ground of the rear under-run protection and in this case, it is necessary to check compliance
with the legal requirements, replacing the support brackets if necessary with appropriate and type-approved types (see Chapter
2.20);
- requires verification of compliance of the transversal limit contour with the regulations.
Prescriptions
Replacing the tyres with others with a different external diameter may have an impact on vehicle
performance (e.g. speed, max negotiable gradient, driving force, braking capacity, etc.); therefore the
body-computer (speedometer, tachograph and speed limiter) must be recalibrated at an authorised
IVECO workshop. NOTE
!
It is prohibited to mount tyres with a different size and structure type on the same axle.
The load capacity of the tyres and the relative reference speed must be suitable for vehicle performance. If using tyres with a lower
loading capacity or reference speed, the permitted loads must be suitably reduced. On the other hand, the use of tyres with a higher
capacity does not automatically involve an increase in the permitted weights on the axles.
The dimensions and loading capacities of the tyres are defined internationally and nationally (ETRTO, DIN, CUNA standards, etc.)
and are specified in the manuals of the respective manufacturers.
Particular performance values can be foreseen by national regulations for special uses, fire-fighting, winter services, airport cisterns,
buses, etc.