I´ve just installed a 12s 11-52T HG cassette in an old GT
with all shimano 12s parts as recomended.
but still not shifting fine. some times needs to shift 2 gears to change
and some times rub trying to go up, while in other gears no problem
maybe need some time to fit
is really light and...
for DH you must go to the near mountains of "guadarrama", at 50-60kms, you can go in the train even near the top of the mountains.
there you have some DH tracks, very technical
but those mountains are better for allmountain
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