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Re: [jonlong] 9.8 or 10.x rope diameter?:
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jt512
Apr 18, 2011, 8:08 PM
Views: 11717
Registered: Apr 12, 2001
Posts: 21904
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jonlong wrote: Thanks for all the info so far. JT512, is the Marathon 10.1 much more durable due to the outer wrap, or just because of the 0.3mm increase in diameter?
The "outer wrap" is called the "sheath." The durability of rope depends on the diameter of the rope and the proportion of the rope's mass in its sheath. The Marathon you are considering will be more durable than the other rope because it has both a larger diameter and a greater proportion of its mass in its sheath. More information can be found on Sterling's website and elsewhere on the 'Net.
In reply to: I suppose I'm less concerned about external rope wear because it won't see very frequent use outdoors (unfortunately) and I don't mind replacing it down the road when it is worn.
It'll probably receive greater wear indoors than outdoors because you'll be hanging, lowering, and falling on it more than you would outdoors.
In reply to: I'm more worried about (and maybe I shouldn't be) how the rope will catch in a GriGri 2, how it will absorb a fall, and that it won't just snap when I take a fall (though I haven't seen any cases of this, just a worry I have).
Grigris don't catch ropes; belayers catch falls. Both ropes are within the specs of the grigri2, so a competent belayer should have no problem with either rope. The 10.1 might be more a little more difficult to feed, but I wouldn't know for sure, since I have not yet used a grigri2.
How a rope will "absorb a fall" is quantified by the rope's impact force rating (lower is better), which can be found on the manufacturer's web site. Finally, no rope will "snap" when you fall unless it is a cut over a sharp edge, which is (a) generally preventable, (b) no factor in a gym, and (c) a rare event anyway.
Jay
(This post was edited by jt512 on Apr 19, 2011, 12:00 AM)
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Post edited by jt512
() on Apr 19, 2011, 12:00 AM
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