These precise dimensions determine the diameter of the rod when the strips are laminated into a hexagonal, square and sometimes octagonal cross-sections
A versatile or medium gear ratio is around 6.1:1-6.4:1, and can handle a wide range of applications
20L (XS): fit for 15-25L bag in height 13.4" - 15.4"(34cm - 39cm), length 9.8" - 11"(25cm - 28cm), width 5.9" - 7.1"(15cm - 18cm) 35L (S): fit for 30-40L bag in height 17.7" - 20.5"(45cm - 52cm), length 11" - 14.6"(28cm - 37cm), width 5.9" - 7.1"(15cm - 18cm) 45L (M): fit for 40-50L bag in height 20.5" - 23.6"(52cm - 60cm), length 12.6" - 14.6"(32cm - 37cm), width 7.1" - 8.7"(18cm - 22cm) 60L (L): fit for 55-65L bag in height 23.6" - 27.6"(60cm - 70cm), length 12.6" - 14.6"(32cm - 37cm), width 7.1" - 9.4"(18cm - 24cm) 70L (XL): fit for 65-75L bag in height 26.4" - 30.3"(67cm - 77cm), length 14.6" - 16.5"(37cm - 42cm), width 9.1" - 10.6"(23cm - 27cm) 80L (XXL): fit for 75-85L bag in height 30.3" - 33.5"(77cm - 85cm), length 14.6" - 16.5"(37cm - 42cm), width 9.8" - 11"(25cm - 28cm) Note: the size is for reference only

Features: U-zip access for full visibility into the main compartment Separate internal J-zip compartment for shoes or clothing Two side panel stretch pocketsone with zip closure, one with side access for bottle carry Front panel zip organization pocket with small drop-in pockets and key clip Internal laptop/document sleeve fits most 16" laptops Adjustable sternum strap Hidden LidLock bike helmet carry Hi-Vis raincover included Loop for blinky light attachment with reflective graphics (light not included) Reflective graphics for visibility FABRIC: bluesign approved, 100% recycled 500D high-tenacity nylon, DWR treatment made without PFAS VOLUME: 1465 IN&3sup
And so again, its like there are Victorian salmon fly tires that have their heads screwed on straight that have not become sort of compromised by this