madburg

Question, my 06 CTTS only shows up to 20" wheel size for tpms settings. I am looking to pick up 21" oem GTS rims or 22" techart rims. How would this work out?

Does anyone with a GTS have tpms see if in their setting option there is a 21 size?

Can a dealer program a car for larger than 20" wheels?

I don't mind spending the money on gettin the sensors installed, but if the settigs don't match, is it pointless?

Also does anyone have a CTTS and know what is the smallest oem rim we can put on the CTTS for a winter setup? Due to he caliper Clarence needed/ & offset.

madburg

wow, no one?

k722070

on my 08 gts there is no 21 inch winter tire setting, last time I checked the dealer told me there is no software update.
using 21 inch tires for winter I've tried the settings at 20 inch winter and 21 inch summer and it doesn't seem to matter.
the sensors have always been off(to the low side) by about 3 lbs, but I'll still know if a tire is going flat from a nail or cut so it doesn't seem pointless.

madburg

Thanks K722070, a bit confused, lets forget about winter, summer for a momnet. Does your 08 GTS have the 21" tire selection available in the display (selection settings)? My 06 CTTS only has 18/19/20 as a selection option on the display.

k722070

yes, there is a 21 inch selection for summer only.
everything else is 18/19 or 18/19/20.

madburg

hmm, my 06 CTTS only has a selection up to 20inch

Wonder if the dealer can have this added (reprogramed)?

Many thanks for looking at yours to help me understand, etc.!