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Old 11-15-2018, 12:20 PM   #1
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undersizing wheels

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
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Old 11-15-2018, 02:17 PM   #2
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Originally Posted by black_box View Post
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.
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Old 11-15-2018, 02:24 PM   #3
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uhmmmm.... so, for entertainment purposes, can you tell me a story about what that trick might be?
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Old 11-15-2018, 08:24 PM   #4
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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".
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Old 11-15-2018, 09:57 PM   #5
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Or, just ignore it for the winter, and check your tire pressures on occasion.
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