2010 BMW X5 Owner's Manual - Page 239

Run-flat tires The right wheels and tires When mounting new tires or changing over from summer to winter tires and vice versa, mount Run-Flat Tires for your own safety. Your BMW Sports Activity Vehicle Center will be happy to advise you. BMW recommends that you use only wheel and tire combinations that BMW has tested and approved for your particular vehicle. Variations in factors such as manufacturing tolerances mean that even wheels and tires with identical official size ratings could actually have different dimensions than the approved units - these differences could lead to body contact, and with it the risk of severe accidents. If non-approved wheels and tires are used, BMW cannot evaluate their suitability, and therefore cannot be held liable for driving safety.< When changing to larger wheels and tires, it may be necessary to make changes to the wheelwell trim piece, as otherwise road users could be endangered or the vehicle could be damaged. Only have this work carried out by a BMW Sports Activity Vehicle Center or a workshop that works in accordance with BMW guidelines and uses appropriately trained personnel.< You can ask your BMW Sports Activity Vehicle Center for the correct wheel/tire combination. The correct wheel/tire combination also affects various systems whose function would otherwise be impaired, e.g. ABS, DSC, xDrive, Dynamic Performance Control in the BMW X6, or Flat Tire Monitor. To maintain good handling and vehicle response, use only tires of a single tread configuration from a single manufacturer. Following tire damage, have the original wheel and tire combination remounted on the vehicle as soon as possible. You will recognize run-flat tires by the circular symbol containing the letters RSC on the side of the tire. Run-flat tires consist of partially self-contained tires and special rims. The sidewall reinforcement ensures that the tire retains some residual safety in the event of pressure drop and driving remains possible to a restricted degree. To continue driving with a damaged tire: > With Flat Tire Monitor, refer to Indication of a flat tire page 93 > With Tire Pressure Monitor, refer to Message with low tire inflation pressure page 95 New wheels and tires Have new wheels and tires installed only by your BMW Sports Activity Vehicle Center or a tire shop that works according to BMW repair procedures with correspondingly trained personnel. If this work is not carried out properly, there is a danger of subsequent damage and related safety hazards. Make sure that the new wheels are balanced.< Retreaded tires BMW does not recommend that you use retreaded tires, as driving safety may be impaired. The causes for this include the possibly different tire casing structures and the often wide variations in their age, which can result in a limited service life.< 237 Online Edition for Part no. 01 41 2 602 756 - © 06/09 BMW AG Reference Mobility Communications Entertainment Navigation Driving tips Controls At a glance