|
The 19" front wheel made my speedo darn near 100% accurate. The bike was shipped with the 19 installed and the 18 as an extra. I rode the 19 for a while and then swapped back to the 18 just to burn up that rubber. If/when I finally wear the 18 down to the wear bars i'll go back to the 19". With all that said, I was struck by the fact that the 19" wheel was tracking so closely to my GPS mph, much closer than any bike I have ever had. I think I was about 1% off. Now with the 18" it's at least 10% off (reads faster than reality).
As for changing the gearing, a 13 tooth front sprocket will tend to accelerate wear on the chain only because it makes the chain go through a tighter arc. If you go to a 15 you'll be forced to slip the clutch a lot just to get started. In my mind the stock 14 tooth sprocket is the best compromise. Play with the rear sprocket if you want to change the gearing.
|