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Master Mono, Version A
Master Mono, Version B
Master RTMAB
Master RTMAB
North Ridge
Master Pro RTMAPB
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| Master Mono, Version A | Master Mono, Version B |
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| Master RTMAB | Master RTMAB North Ridge |
Master Pro RTMAPB |
[ Top | Master Mono v. B | Master | Master North Ridge | Master Pro | Return to Belay Tubes ]
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I acquired my Grivel Master Mono, Version A from Sunny Sports in 2017.
Version A is a notched belay tube. It is forged from aluminum alloy and soft anodized. Mine is 83 mm. long, 32 mm. wide, 86 mm. high, and weighs 68 g. It has one slot with ribbed v-grooves and a plastic-covered cable keeper. The slots are 34 mm. long and 13 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 22 mm. below the ends of the slots.
One side is printed with the Grivel logo, "GRIVEL," "MASTER MONO," a book-with-an"i" icon, "EN 15151-2," "UIAA"129-5," "00445" and "02 14."
The ten small holes lighten the device a small amount, but my impression is that they are primarily cosmetic. With the large carabiner eye and thick walls, the Mono is heavier than many double-slot belay tubes. While a few grams may not matter, I prefer the versatility of a double-slot device.
The top surface is stepped, allowing for deeper rope grooves without lowering the notches.
[ Top | Master Mono v. A | Master | Master North Ridge | Master Pro | Return to Belay Tubes ]
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I acquired my Grivel Master Mono, Version B from Eastern Woods Outdoors in 2021.
Version B is a notched belay tube. It is forged from aluminum alloy and soft anodized. Mine is 83 mm. long, 32 mm. wide, 86 mm. high, and weighs 67 g. The slots are 34 mm. long and 14 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 22 mm. below the ends of the slots.
One side is printed with the Grivel logo, "GRIVEL," "MASTER MONO," a book-with-an"i" icon, "EN 15151-2," "UIAA"129-5," "00827" and "01 17."
While Version A has a frosted finish, Version B has a smooth finish. The difference is cosmetic only.
[ Top | Master Mono v. A | Master Mono v. B | Master North Ridge | Master Pro | Return to Belay Tubes ]
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I acquired my Grivel Master RTMAB from ExtremeGB Ltd. in 2012.
The Grivel Master RTMAB is a notched belay tube. It is forged from aluminum alloy and soft anodized. Mine is 53 mm. long, 40 mm. wide, 91 mm. high, and weighs 67 g. It has two slots with ribbed v-grooves and a plastic-covered cable keeper. The slots are 34 mm. long and 13 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 21 mm. below the ends of the slots. There are five 6-mm. holes in each side and five 4-mm. holes in the central rib.
One side is printed with the Grivel logo, "GRIVEL," "MASTER," a book-with-an"i" icon, "07 11," "PrEN 15151-2010," and "00355."
The fifteen small holes lighten the device a small amount, but my impression is that they are primarily cosmetic.
The top surface is stepped, allowing for deeper rope grooves without lowering the notches.
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[ Top | Master Mono v. A | Master Mono v. B | Master | Master Pro | Return to Belay Tubes ]
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| Front | Rear | Top |
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| Left | Right | Bottom |
I acquired my Grivel Master RTMAB North Ridge from Andrius Jasinavicius in 2015.
The Grivel Master RTMAB is a notched belay tube. It is forged from aluminum alloy and soft anodized. Mine is 52 mm. long, 39 mm. wide, 98 mm. high, and weighs 65 g. The slots are 34 mm. long and 14 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 22 mm. below the ends of the slots. There are five 6-mm. holes in each side and five 4-mm. holes in the central rib.
One side is printed with the Grivel logo, "GRIVEL," "MASTER," a book-with-an"i" icon, "01 14," "EN 15151-2-2010," and "01468." The other side is printed with a mountain logo and "North Ridge®."
The North Ridge came with a Grivel locking carabiner. The belay tube is identical to the Master RTMAB, except for markings.
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[ Top | Master Mono v. A | Master Mono v. B | Master | Master North Ridge | Return to Belay Tubes ]
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| Front | Rear | Top |
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| Left | Right | Bottom |
I acquired my Grivel Master Pro RTMAPB from ExtremeGB Ltd. in 2012.
The Grivel Master Pro RTMAPB is a notched belay tube. It is forged from aluminum alloy and soft anodized. Mine is 102 mm. long, 40 mm. wide, 95 mm. high, and weighs 92 g. It has two slots with ribbed v-grooves. The slots are 34 mm. long and 14 mm. wide. The top of the Omega oval carabiner that I use for comparing belay tubes sits 20 mm. below the ends of the slots. There are five 6-mm. holes in each side and five 4-mm. holes in the central rib.
The Master Pro RTMAPB has a horizontal carabiner eye at the end opposite the grooves, much like the eye on the LACD Evo Alpine. Unlike most "guide ATCs" like the Black Diamond ATC-Guide, BlueWater Ranger and LACD Evo Alpine, the Master Pro has a horizontal T-horns at the notch end. The Master Pro has a stiff, plastic-covered cable keeper.
One side is printed with the Grivel logo, "GRIVEL," "MASTER PRO," a book-with-an"i" icon, "07 11," "PrEN 15151-2010," and "00355."
The T-horns provide for some interesting, if nonessential, options for increasing friction or possibly tying off.
The Grivel Master Pro is covered by U. S. Design Patent #D716,132 S from 2014.
[ Top | Master Mono v. A | Master Mono v. B | Master | Master North Ridge | Master Pro ]
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