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cleat installation and adjustment
 The
cleats are compatible with all standard SPD® compatible
shoes and do not have a front and back but there is a left
and a right cleat that changes the release angle. Cleats
for road shoes are also available.
Cleat with the two circles on your right shoe means earlier
(15º) release angle on both feet.
Cleat with the two circles on your left shoe means later
(20º) release angle on both feet.
Cleat release explanation: When the cleat with the two circles
is on your right shoe, both feet release at about 15 degrees
when your heels are twisted outward, and about 20 degrees
when your heels are twisted inward. When the cleat with
circles is on your left shoe, both feet release at about
20 degrees when your heels are twisted outward, and about
15 degrees when your heels are twisted inward. The cleats
are symmetric to each other. Therefore, both your feet will
release the same (early or late) as each other. Use the
steel washers with the cleats.
We recommend beginners always start with the cleat with
the two circles on the right shoe. Many experienced riders
prefer this position as well.
Step One: Position the cleat on the shoe including washers
and install 4mm Hex screws through the cleat and washers
and into the metal plate in your shoe. Tighten the screws
securely (40-50 in-lb (4-5 Nm)). Note: the cleats can rotate
a few degrees each direction and slide side to side in order
to allow you to customize the right position for you. You
will probably need to reposition the cleats a few times
in order to place them in the best position.
Step Two: Place one foot on smooth level ground and engage
your other shoe into the pedal. Rotate your foot back and
forth a few times to feel the free float. For most people,
the best position for the cleat allows you to pedal comfortably
without having to twist against the spring tension. In other
words, when the cleat is properly positioned, you will feel
a few degrees of rotational motion without feeling spring
tension. Twist your heel outward to disengage from the pedal.
Step Three: If the cleat is not in the correct position,
loosen both screws and twist the cleat slightly. Re-tighten
the screws securely and repeat Step Two.
spring tension
With conventional pedals, if the spring tension is set low,
then it is easy to unclip but also easy to accidentally
pull out of the pedal. If the spring tension is set high,
then it is very hard to clip in or out.
Our unique patented design eliminates the need for spring
tension adjustment. Retention is not dependent on spring
tension. Clipping in and out will become easier after the
cleats break in.
mud
Acid pedals are generally unaffected by mud and other natural
debris. In extreme cases, you may need to twist back and
forth in order to engage (this will push particularly thick
mud through the pedal). Do not use pressurized water on
Acid pedals.
engaging the pedals
The Acid give you several entry options. With any of these
options, you will need to put enough force to spread open
the pedal. There will be an audible "click" sound when the
pedal is engaged. To verify you are engaged, pull slightly
upwards.
 engage
option 1: Step down and forwards into the pedal.
engage option 2: Step down with
the cleat behind the pedal. Then push forwards and the pedal
bars will flip over and engage.
engage option 3: Step
down with the cleat in front of the pedal. Then pull backwards
and the pedal bars will flip over and engage. Usually it
is easiest to make the pedal bars flip over to engage during
the downward stroke while pedaling.
These techniques take some practice. Place one foot on smooth
level ground and practice engaging and disengaging from
each pedal a number of times. Even if you are experienced
with clipless pedals, all clipless pedals take some practice
to get used to. Get used to them before going off-road or
anywhere dangerous.
disengaging from the pedals
Release from the pedal is achieved by an outward twist of
the heel. It is also possible to release by twisting inwards
but generally this only takes place accidentally. When you
want to disengage, most riders find it easiest and safest
to do so by twisting their heals outward. If you prefer
twisting inwards, we recommend you place the cleat with
two circles on your left shoe to make inward release earlier.
tread interference (difficult clip
in and out)
Some shoes have a tread that is higher than average, which
can cause interference with the pedal, making it difficult
to clip in and out of the Acid pedals. If you have tread
interference, the shims should help. Ideally, the tread
of your shoe contacts the pedal, but not too much. With
ideal contact, you will achieve maximum stability with easy
clip in and out. Try to clip your shoes in the pedals when
you're not wearing them and look closely to see if it appears
there is excessive contact between the tread and the pedal.
If the pedal compresses the tread, then you have interference
that will make clipping in and out more difficult. If this
is the case, then you'll need to either use the Shims provided,
or trim your tread.
 If
you decide to trim the tread, we suggest you use a hand-held
sanding wheel (like a "Dremel") or a sharp knife, but please
be careful (including safety glasses) and remove only a
small amount of tread at a time in order to check for interference.
In the rare event that you need two Shims per shoe, contact
crankbrothers and we will provide them for free. If you
have interference, remove the cleat and place the Shim (with
the textured points) toward the shoe and under the cleat.
Do not use the Shim unless you have tread interference or
your shoe will be less stable on the pedal. Many shoes will
not cause tread interference with the pedals.
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