Definitely give them the serial number. It can't hurt.
What I do is to take a picture of the bike. Go into Photoshop, Gimp, Microsoft Paint etc and put the serial number, make model, year and my name and contact info over the pic. That way if my bike gets stolen, I already have all the info that they need, in printed and digital form.
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"He who serves all, best serves himself" Jack London
Originally Posted by
Bjforrestal
I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.