In reply to Joey C:
> (In reply to ConstaBern)
> When looking to buy a rope something to look for is the treatments on the rope...
>
> If going outdoors an outer sheath treatment is highly recommended to keep the dirt/grit from getting into the core of the rope. I know that mammut use something called 'super dry' coating which is for that purpose. Other manufacturers have their own style...
Super Dry and similar treatments are meant to stop the shealt of the rope from absorbing water. This is important when winter climbing (wet rope that freezes is a biatch to handle, but more importantly it might actually break easier.
That said, yeah dry treated ropes tend to be slicker when new and thus less prone in getting grit and grime in 'em.
For normal sport climbing though... get something cheap in the correct lenght. The ticker the rope, the more it will take a beating. So ~10mm is pretty spot on as a general workhorse sport rope.
~9mm (so around 8.7 to 9.3 or so) ropes are more for harder redpoints for perhaps some alpine adventures. Not really that stellar for generic single pitch clip-ups.