HOW TO TIGHTEN A LEFT PEDAL?
August 19, 2005
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Is there a special nut that
attaches the pedal spindle onto the axle? I have a mountain
bike and recently the pedal shaft became loose from the
axle on the left hand side only; I noticed the nut had became
loose. No matter how hard I tighten the nut, it just keeps
loosening when I cycle hard.
The pedal axle on the left side
of the bike screws into the crank in the opposite direction
of most bolts. I mean, to screw it in you rotate the axle
nut (known in the biz as the "flats," go figure)
counterclockwise as you face the side of the bicycle. The
pedal axle kept getting loose because you loosened it, not
Bicycle manufacturers designed left pedals this way so
that the act of pedaling forward would not cause a mildly
loose pedal to become even looser. Pretty clever, huh?
When you tighten the axle nut, tighten
it only about an eighth of a rotation after the axle nut
starts to resist your wrench. Overtightening will make it
hard to remove later.