The conventional modern day tyre size is 2.2 inch, this is what your ballistics etc are. The schumacher blocks are basically a revamped older tread tyre in a modern compound, when they were brought out the standard tyre size was 2 inch, so these tyres still have a diameter designed for 2 inch rims - its not a problem though just fit them onto your 2.2 rims, as you say it will be a very tight fit! Just use a standard insert - I notice you have bought the 'tubby' insert, this will be ok for your modern tyres but too big I think for the blocks, make sure you glue them and you're good to go
