undersizing wheels

[black_box]

Hi all, I have a set of 17" wheels with snow tires mounted that used to run on my 986 during winter. My 987 has a setting in the TPMS system for 18"/19" wheels -- will it be ok to put the 17's on for winter?

ninja edit: Now that I think of it, is there any way to temporarily disable TPMS so that I don't have it telling me I'm flat all the time since my snow rims don't have sensors? I have an iCarSoft POR II

[JFP in PA]

Originally Posted by black_box

Hi all, I have a set of 17" wheels with snow tires mounted that used to run on my 986 during winter. My 987 has a setting in the TPMS system for 18"/19" wheels -- will it be ok to put the 17's on for winter?

ninja edit: Now that I think of it, is there any way to temporarily disable TPMS so that I don't have it telling me I'm flat all the time since my snow rims don't have sensors? I have an iCarSoft POR II

Yes, there is a way to disable the TPMS system on these cars; however, you will have great difficulty find a shop to either do it or tell you how, as you would be disabling a federally mandated safety system, and could be held financially liable should the vehicle become involved in an accident after your actions.

[black_box]

uhmmmm.... so, for entertainment purposes, can you tell me a story about what that trick might be?

[Topless]

17s should work fine and if the TPMS message bothers, you have 2 easy choices:

A. Have a local tire shop install generic TPMS sensors on your 17s. Mine were about $30 ea from America's Tire.

B. Cut a piece of duct tape and place it over the offending message on your dash.

Both methods are proven to work but I prefer option "A".

[Geof3]

Or, just ignore it for the winter, and check your tire pressures on occasion.