Quote:

Quote:

What size front tire do you have?
If you change to a slightly taller one, it will slow the speedo down.
A 110/80 has an 88mm sidewall.
A 100/90 is 90mm.
A 130/70 is 91mm.
But the big change is a 120/90- 108mm, it should slow
your speedo down by 22%.



I think changing from stock to a 120/90 only slows your speedo down about 6% - but hey I've been wrong before



I'll agree with you on this 1 Richard
the difference in radius between the size's at most is only 20mmish so by the time 1 is to do the pye r squared thingy its only about a extra 120mm in circumference i'll do a roll out with mine with the 12/90 tomorrow and just see what it is
am thinking the roll out will be say 2.1 to 2.4 meteres so yeah something along the lines of 4-6%
Benny

04 yellow&black Speedmaster+the Money Pit{xj jeep}