Just on a side note, the std 26" downhill bike (large size) whatever it may be is already a long bike if made into a 29" the frame design would have to be major, owing to the extra wheel base and as such manouverability will be affected. The bike cannot possibly have the same wheel base as the bike would be very high off the ground and its balance point would be screwed up. I was just wondering how you think the problem could be solved?