Are No Fear shoes true to size?

I want to buy a pair of No Fear sneakers on Sports Direct and I usually wear 39/40 (6/7). I was going to get the size 40 because they usually fit me well but they just ran out of my size in the shoe I wanted. Should I go a size down to 39 or up to 41?

Nike shoes run small and I buy size 41 if that helps.
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