I'm in Edmonton and I haven't ran into that problem yet. I heard that there was going to be a rubber shortage this year. But MEC hasn't been well stocked on anything since they tried selling the store. I would try calling the other bike stores and It might not hurt to buy a extra set and stock up for the season. The only other thing I did hear from one of the big bike stores was that a container of bike parts was lost at sea so they are low on all parts. Who knows?