Check your rear hinge while you're at it, if you use it 5 days a weeks, you'd need to replace it yearly.
I have to replaced 2 hinges yesterday, and a frame swap because the copper insert bonded to the frame because the customer neglected it since new (2011).
Fuck me it's heavy though! I can see why people go for the slightest weight reduction and wheel rather than carry them. I can't for the life of me work out what the two 'wheels' on the frame triangle are for though.
Cheers Ed!