
According to the Monster Manula v.3.5, page 247 ... A typical adult troll stands 9 feet tall and weighs 500 pounds.
I would think 3 troll hides, in that mindset, would weigh more than 1.5 pounds.

Also from the MM v.3.5, page 283 for the regular wolf entry, there is no specific weight or length listed, however, when you look at page 66 for the Dire Wolf entry, Dire wolves are mottled grey or black, about 9 feet long and weighing some 800 pounds. As dire animals are larger, tougher, meaner versions of ordinary animals ... I'm guessing that 12.5 pounds for 5 regular (non dire) wolf hides is very off.
Also, the troll hide quest is far more difficult than the wolf quest, so shouldn't the higher level folk be more capable of handling heavier items than the lower folk, what with spells and items available to enhance strength?
Just curious.