Six foot may be tall for 170mm (inseam and femur length would be better info)...
There are crank length calculators, use Google...
I ride 170mm and I am 5' 7" on a good day...
Some will argue too short, some will say its only 2.5mm...
You will be able to spin, spin, spin...
Longer cranks...more leverage for those hills...
I vote too short...
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