The percent increase in force a climber needs to apply to pull him- or herself into a tree for each type of rope and ring material compared with a frictionless situationz.
| Rope | μS | μK | ||||
|---|---|---|---|---|---|---|
| STEEL | PAL | AL | STEEL | PAL | AL | |
| AP | 126% | 111% | nm | 108% | 92% | nm |
| APu | 191% | 168% | 175% | 179% | 162% | 167% |
| BLAZE | 115% | 93% | nm | 102% | 85% | nm |
| BS | 132% | 108% | nm | 120% | 99% | nm |
| FLY | 147% | 132% | 151% | 135% | 120% | 139% |
| SB | 121% | 108% | nm | 112% | 98% | nm |
| SB3 | 118% | 108% | nm | 106% | 95% | nm |
| SBHV | 107% | 104% | 128% | 98% | 89% | 85% |
| SBHVu | 141% | 122% | 132% | 138% | 119% | 126% |
| SP | 121% | 102% | 122% | 109% | 95% | 108% |
| TB | 108% | 99% | 124% | 98% | 89% | 112% |
| TM | 118% | 102% | nm | 113% | 100% | nm |
| XTCP | 118% | 100% | nm | 107% | 93% | nm |
| XTCS | 118% | 105% | 119% | 107% | 94% | 107% |
↵zValues for static friction coefficient (μS) correspond to the maximum increase in force just before the rope moves relative to cambium saver rings. Values for kinetic friction coefficient (μK) correspond to the percent increase in force while the rope moves through the cambium saver rings. “nm” indicates no measurements were taken. See Table 1 for rope and ring abbreviations.