me again brother, joe is in the big middle of this as we speak, joe has gone to a 525 x 40 tooth rear, he loves it.
joe was the prototyper on the project so he has ordered a 41 tooth rear cos I have a free one coming, I had just called and told PMP.
Now his plan is this,,,, to do some track days, to ride every single day of the year that he possibly can.
then when the chain is worn out he will go and get a 520 set-up unless he gains some knowledge on this that he is unaware of now.
a day without riding is a day with more grief.