The 205x65 will give a diameter 5% larger than the standard 195 x 60. So acceleration will diminish a little and 50mph will be 52.51 mph not a huge difference but you could always recalibrate the speedo. ( also bear in mind, Griffo has a rocket engine under the bonnet so acceleration issues are not so much a problem)


Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900