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GM Climbing
(#2833)

Front Rear Top
Front Rear Top
 
Left Right Bottom
Left Right Bottom

Technical Details

I acquired my GM Climbing from Aaron Marcus in 2021.

The GM Climbing is a notched belay tube. It is forged from aluminum alloy and soft anodized. It has 2 slots with ribbed v-grooves and a plastic-covered cable keeper. Mine is 55 mm. long, 44 mm. wide, 93 mm. high, and weighs 63 g. The slots are 35 mm. long and 16 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 15 mm. below the ends of the slots.

One side is printed with a rigging illustaton, "GM 1005", a book-with-an-"i" icon, "0420," "EN 15151-2:2012," "UIAA," the GM Climbing logo, and "For rope 8-11mm."

Comments

The GM Climbing is one of the following essentially identical notched belay tubes:

Image Device Base
Brasovia Notched Brasovia Notched Flat
Climb Axe V-LOK Climb Axe V-LOK Recessed
Climb Tech Climb Tech Flat
Cypher XF Cypher XF Flat
Elliot Elliot Flat
Epic Peak Epic Peak Flat
Image Device Base
Fusion Neo-Sat Fusion Neo-Sat Flat
GeeLife Geelife Flat
Good Makings Notched Good Makings Notched Flat
GM Climbing GM Climbing Flat
Lixada Lixada Flat
NAT NAT Flat
Image Device Base
NTR NTR Flat
Stubai BC PRO Stubai BC PRO Flat
Triwonder Triwonder Flat
Tupa Tupa Flat
Yoke Yoke Flat
     

Each of these is 54±1 mm. long and 45±1 mm. wide, and has a weight in the 60±7 g. range. Their slots are all 35 mm. long and 16 mm. wide.

The shallow V-notches used in this design do not seem to be very effective at increasing the braking force. The notches do not have the narrow angle found on the Trango Jaws and its equivalents, so they do not create the same wedging action. Spreading the friction helps with heat dissipation, but like all belay tubes, these can get quite hot when used for rappelling.