I have stopped using the replacement shoes, the compounds are not that good and on imperial shoes they substitute metric sizes which mean they are half worn new. So I send the original shoes out for relining and sizing to the dimensions I provide. The Ferodo shoes for Grimea should be the right size being metric, as to the compound being any good you can only buy them to find out, but if the compound is no good at least you have the shoes to get relined.