Now after 40+ years of riding I know that most speedos are 5% off to the fast . My new SE seemed way to good in the curves that I usually ride and I know I did not get that good overnight. I set my garmin on the tankbag and at an indicated 70mph the garmin says 60mph. This was striaght line . Repeated many times -same result. If my calculations are right it appears that they forgot to adjust the speedo gears for the 17 inch wheel. 19 to 17 is about an 11% circumference diff plus the usual 5% error equals 16% . 10mph error at 60 mph equals a 16% error . What's up triumph. Anyone else with a new 17" wheel bonnie notice this ?