
The SportCrafters OverDrive Drum is designed to deliver
reliable performance for a lifetime because there are no seals or
friction devices, and nothing to wear out over time. Below is a
sneak peek at what is inside your OverDrive Drum.
Installation:
The drum should be
installed at the rearmost
position on the roller set.
To enable the progressive
resistance mechanism,
you must install the drum
so that the red cap is on
the right while you are
riding the rollers.
To disable the progressive resistance, and use the roller
for easier spinning at higher speeds, simply reverse and
install with the red cap on the left while riding the rollers.
Important Note: Feedback we have received from various
users tells us that many stronger athletes like the ability to do
intense climbing intervals by pushing hard at low cadence. So,
the power curve is intentionally steep. For recovery, you might
need to be in your small chainring.
If your roller is equipped with knobs fastening the two rear
drums, then your job is easy! Simply remove the two knobs
holding the middle drum, and one of the knobs holding the rear
drum. Separate one side of the frame, remove the middle drum,
and install the High Inertia Drum.
Make sure the roller frame aligns
like this:
Adjust front drum by folding the
frame to remove the tension on
the belt, then removing the knobs
on both sides of the drum. If one knob stays tight while the
other one comes loose, screw the loose knob back onto the
axle approximately 2-3 turns, then push the knob sideways
slightly to put a slight bind onto the threads. Now loosen
the other knob.
Spread the front legs apart just enough to slide one end of the
axle out of the frame. Then slide the other end of the axle out.
The frame will flex enough to allow you to remove the drum
without bending the frame. Choose a new position for the drum,
make sure the belt is on the drum properly and re-tighten the
knobs.
Place your bike so that the rear wheel is cradled between the
rear and middle drums, and the front wheel is on top of the front
drum. The position of the front drum should be adjusted so that
the center of the drum is slightly AHEAD of the axle of your bike’s
front wheel. Use the FIRST adjustment position that places the
drum ahead of the axle of your bike’s front wheel.