3-4% I think for the mtb. Though struggling to remember what I was paid 5 years ago (the bike is a bit like Trigger’s broom by this time). Probably a bit less than that for the roadie (er, one of the roadies).
Mind you, comparing to gross salary doesn’t take into account what you have left after the taxman has had at you. An interesting measure might be against net salary, i.e. “of the £X,000 I had to live on this year I spent Y% of it on a push bike”. That really could be divorce-making material for anyone who prioritized carbon fibre bling over the family holiday :lol: