To all you 29er's out there!

Sounds like you're inbetween sizes, i'm 5"10 and the 18" frame is just small enough for me. I was considering switching it for a 16" but then my seatpost wouldn't be long enough so I stuck with it. Sounds like the 16" is your best bet.

Hmmm, this is my problem. I am at max seatpost length and my legs aren't at full stretch. I realise for offroad I will probably want it a bit lower than road cycling height, but I'm worried.

Sorry, I hate doing the newbie stress! I did try to find a shop in London to try before I bought... Maybe I should swallow it and go for the size up.