This article shows a lefthanded bias for climbing and eating, with one bat species:
Paolo Zucca, Alessandra Palladini, Luigi Baciadonna, Dino Scaravelli.
"Handedness in the echolocating Schreiber's Long-Fingered Bat (Miniopterus schreibersii)"
Volume 84, Issue 3,
According to Paul et al. (2007), shaved fur patches of male Siberian and Syrian hamsters had a mass of about 12 mg/cm2 dorsally and 3 mg/cm2 ventrally.
This search give me the page.
Fig 1 from Paul et al. (2007) compares mass of fur growth across time for 2 groups exposed to differing lengths of daylight (long, LD, and short, SD) to examine winter fur ...
The current research doesn't venture many details on the elbows/radius/ulna and locomotion biomechanics.
For the moment they just say the elbow was "slightly flexible" and that the bones were transitioning towards a round shape.
You can research deep into the resources and will perhaps find more.
Here are a resource which give context, found via &...