Pirelli MT21 Pressures
I had a local shop put on a set of Pirelli MT21s over the weekend in prep for a trip I am going on in a week or so that will involve an undetermined amount of off-road. Better safe than sorry, I figure.
I asked the guy what pressures he used, he said "32R/30F". That seems in the ballpark for street use. I am interested in what to run in them for the highspeed freeway run from San Francisco up to Bear Valley (on highway 4) with my heavy ass and a bunch of camping gear on the bike.
According to the Pirelli USA website, they list 30-36PSI as the MIN-MAX for the front tire and 30-33PSI as the MIN-MAX for the rear. That seems to me like a very high MIN, and a low MAX for the big rear tire. But it checks with what is on the sidewall, the rear says 33PSI max.
I want to air them up hard for the run up there, and if I hadn't researched it I probably would have done something like 36R/32F. Also when I get up there in the rocks and dirt I want to air them down, but my plan of taking them down to 20R/18F seems to be way outside what Pirelli recommends.
Those of you who have used MT21s on a KLR before under similar conditions, what kind of pressures did you find suitable? I don't want knobs falling off the rear before I get to the mountains!