60 mph

17 = 3700 rpm (59 mph)
18 = 3500 rpm (59 mph)
19 = 3400 rpm (60 mph)

``````````````````
70 mph

17 = 4400 rpm (70 mph)
18 = 4200 rpm (71 mph)
19 = 3860 rpm (69 mph)

Culled from
http://www.xs4all.nl/~ator0437/gc/
From the drop down lists, choose Triumph > Bonneville > T100
then click "load presets" and select "MPH & inch" button from near the center of the page. The "Final drive ratio front" number can be changed to whatever you like, which will re-calc the entire result.

Redline should be around 8,000