I went one tooth down on front sprocket (16T) on my '18 model DL1000 as well as I did on my previous bike, '14 DL1000. Both bikes had tires replaced to Michelin PR4, front and rear. Front Trail and rear Non-Trail (there was no front Non-Trial). I've never had a problem with TC light. I ride with TC1 on dry paved roads and TC2 on wet.