Thoroughly read and understand these instructions.
Sling the BigBro with 75cm (30”) of
6
mm Tech Cord. The knot should be tied on the side of
the BigBro directly opposite the trigger.
Carry the BigBro in its compressed position.
Make sure the collar can rotate freely.
Place the BigBro in a crack or pocket, press the
end of the inner tube flush against the rock and
push the trigger button.
Let the BigBro expand slowly to the exact crack
width. The best placement will be when both
faces are flush against the rock and the end of
the inner tube is lower than the the outer tube.
SPIN THE LOCKING COLLAR TIGHT AGAINST
THE OUTER TUBE TO LOCK THE BIGBRO IN
PLACE.
Test the stability of the placement by tugging firm-
ly on the BigBro sling in all potential directions of
pull.
Spin the collar to the outside end of the inner
tube.
Collapse the BigBro until the trigger catches.
Always allow the BigBro to expand slowly. Press the inner tube against the rock or other sur-
face before pushing the trigger.
Find the most parallel placement available to achieve full contact between both tube ends and
the rock.
Tighten the collar securely to lock the BigBro in place.
When possible place the threaded end of the inner tube on the right side of the crack so the
moving rope tends to tighten the collar as you move up.
Try to locate the end of the inner tube on a small bulge or other irregularity. Make sure the end
of the outer tube is in full contact with the rock. At the minimum, try to achieve a tripod effect
with the outer tube of the BigBro in full contact with the rock and the inner tube contacting at
one point.
As with all climbing protection stability becomes more difficult to attain as the flare angle of the
crack increases. BigBros do not work well in radically flaring cracks.
B E F O R E U S I N G :
T O P L A C E :
T O R E M O V E :
I M P O R T A N T:
F O R U N M A T C H E D
S T A B I L I T Y :
F O R N O N - P A R A L L E L
P L A C E M E N T S :
BigBro
™
Expandable Tube Chock
How to Enjoy Off-Widths with BigBros
™
IMPORTANT!!!
This product is designed for climbing and mountaineering only.
Climbing, and any other activity for which this product may be used, is inherently dangerous.
It is the user's responsibility to understand and follow all instructions for proper use.
Spin
Test
Climb
Push
