Take the 5mm Hex wrench and
remove the chain ring bolts (photo
1). Grab a hold of the pedal for
leverage. There are two parts the chain ring bolts.
After unscrewing the front, you need to remove the
other located at the back of the small chainring.
After removing the chainring bolts, let them soak in a
small container of your degreaser while you continue.
When removing these bolts, TAKE YOUR TIME! Be
careful of your knuckles when unscrewing these bolts.
The sudden loosening of a bolt could find your
knuckles/hand becoming one with the teeth of the chain
ring...and believe me...the chainring teeth WILL cut
After removing the screws, line up the right side of
the crank system with the right crank arm pointing
straight down (12 and 6 o'clock). (Photo 2) You will
notice two numbers located on the chainrings at the 12
o'clock point. These numbers represent the number of
theeth on the each chainring. These are important to
remember upon putting the chainring back together.
They must be facing you. Some larger rings will also
have a pin on one end (Photo 2) that lines up directly
behind the right crank arm at the 6 o'clock point.
Once removed, you srub away on the chaingrings!
3) Remove the chainring. First remove the big
ring from the front (Photo 4)
the remove the smaller ring from behind the crank
4) You will now have access to your chain. (Photo
6) Simply take the chain and lift it around the
crank arm so you can now access the bottom bracket
(Photo 7 & 9). Dip the toothbrush into the
solution and begin scrubbing. And don't forget the
underside as well.
(Photo 8) This area is often neglected and is a
5) And while you are at it, clean your pedals! (Photo
10)For some pedals, the build up of dirt and
grime will actually comprise the fit of the cleat as
well as the float.
LET'S PUT IT ALL BACK TOGETHER!
Before putting the
chainrings back on the crank arm, lift the chain back
over the crank so it is inside the crank arm and
resting on the bottom bracket tube.
When putting the chain rings back on, begin with
the small ring first. While facing the chain ring, fit
the small ring from behind. Make sure the number on
the ring (39 or 42) is facing you. Then replace the
large ring from the front with the number facing you
(53, 56, etc) Both should fit snug in their respective
positions. Also make sure the pin or dimple on the
larger ring is lined up with the crank arm.
2) Attach the screws, making sure the holes
line up. They should tighten down on their own.