Originally Posted by
bigvegan
There's also a significant difference between tightening the cranks on a road bike and on a fixie, due to the different stresses involved.
If you're using a fixie on the street, you're going to be putting substantial pressure on the crank in both directions, so you're going to need to tighten the crank bolts a lot more often, especially if you're a heavier rider.
Don't crank them down so tight you split the crank, but do tighten them back up after every ride or two.
There's no difference between tightening cranks bolts on a roadie or a fg. Torquing the bolts to spec is the same no matter what type of bike.
Have you been paying attention how crank bolts are overtightened and split a crankarm? Just keep tightening up those crank bolts every few days, you're doing it right.