If you're one of those who has purchased and installed up-sized tires and rims for your favorite vehicle, be sure you have a spare tire and rim on hand that is no more than three (3) inches smaller in diameter than your custom rims. Mounting a much smaller spare tire and rim onto a drive axle could result in serious damage to the transaxle, transmission or rear end. Smaller sized spare tires and rims mounted onto a free-wheeling axle could adversely affect your Automatic Braking (ABS) System to the extent you not only may not then have effective brakes, but in a few cases, no brakes at all.
Too, be sure you have the necessary tools to remove an over-sized rim from your vehicle. Many of the larger rims have recessed lug nuts or bolts that may preclude the use of your conventional wheel lug wrenches. In some cases, special deep-well sockets may be necessary to remove lug nuts from a wheel with a flat tire. Conventional, non-impact grade sockets are thin-wall in nature and can be used. Be sure to have a breaker bar, or an automatic ratchet, to use with the sockets.
If you have a security lug nut; that is, one which can prevent the theft of your tire and rim, be sure to have the "key" in a safe location inside the vehicle or in the trunk. Most roadside assistance services do not carry the tools necessary to remove these devices if the key is lost (mine does), and you could end up having to tow the vehicle somewhere to remove the security lug.
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