Hello, I'm a long time lurker; first time poster. I bought a 2006 V70 yesterday that's equipped with DSTC. It had 18" rims which I considered ugly and had a bad case of curb rash. Also, I live in a Canadian city where deep potholes were invented and I didn't like the fact that there was about 1" of sidewall on these tires. I asked the dealer to replace the 18"s with the pristine 16" rims from another car as part of the deal and he agreed.<p>Now, I am having second thoughts because I'm wondering if the smaller rims will result in the DSTC not operating correctly, or if the speedo will be badly off. Can anyone address these questions?