Have a brightly coloured BMX-themed doona cover?
Done every Alpine Classic or ATB since 1992? Have a equally bike nerdy partner who doesn't mind you bringing the workstand into loungeroom?
Do you laugh loudly when seeing other riders with those trendy new knicks with rear ventilation, as your much-loved knicks or shy shorts are exactly the same, just the arse is worn out of them?
Do you really care when the conversation turns from Shimano to Campy?
Do you proudly wear explorer socks with road shoes?