I also am seeing the front X belt on my Ultimaker 2 starting to tear, with some fiber threads beginning to poke through the rubber.
I want to order replacement belts, but the Ultimaker store only lists replacement belts which are compatible with the original model:
https://www.ultimaker.com/products/belts-pack
Is this pack also compatible with the UM2? If not where and how can I source a replacement?