Re:
That's very kind of you. Was thinking about an old cheap mtb, nothing special, to go round with the kids etc (little kids - need to get a trailer), which i could basically give away at the end when we head home. We are there for a month so figured buying something cheap would work out better than renting.
We are staying in SF, but given we have a bit of time should be able to get out of the city, especially on the weekends
(Separately - if I were to happened across something really nice then i might take the opportunity!)