why don't you ride to the interesting part on your worn standart tires, change them in Mexico to knobbies and start the fun with fresh tires. We always start our vaccation trips on very used MT90 (we get from the dealer or friends) and change them at the destination (Iceland, Romania, Balkan,...). I love the MT21 front and rear on sand and rocks, it will be shot after 1200miles, but still enough to bring you home on asphalt.
The E09 kombo in 90/90-21 and 150/70-18 is what I ride now, the back is OK, it will be down after 2000-2500 miles. The front won't be good in sand, its OK for asphalt, gravel and in the forest, but not for sand and mud.
I do not care for the livetime of the tire, I want fun also on asphalt. If you are careful on asphalt with the throttle you get out more, but it is fun to drift the corners on the alp roads with the E09 :)
We blew it
AUT-EasyRider screwed with this post 02-05-2013 at 02:24 AM