UR
pulleys
add
close
to
12HP
on
all
Models.
Horsepower
increases
are
very
noticeable
due
to
the
fact
that
UR
pulleys
primarily
gain
low-end
torque.
The
main
purpose
of
the
underdrive
pulley
is
to
lose
as
much
weight
off
the
crank
pulley,
and
turn
that
extra
lost
weight
into
HP
Gains.
One
Crank
Pulley
2
belts
are
included
with
every
UR
Pulley
order.
