Been a' measurin'.
Currently my BB-to-saddle height is 33", my reach (measured as centre of seatpost to centre of hoods) is 30", and the hoods are 42" off the ground and an inch higher than the top of my saddle.
I'm still unsure if a similar position can be achieved on what is a rather smaller frame, even with the super-tall stems (remember that I'm using a super-tall Technomic stem to get into the above position anyway) - if the MTB frame is 20" rather than roadie's 25", with a horizontal top-tube, then the headset is going to be 5" lower...
Working this out with the 'Dirt Drop' stem, I reckon the bars will end up about 2" lower and 1.5" closer (shallower frame angle helps) than they are at the moment. However, the Dirt Drop stem takes a 1" threaded headset and I think I'm right in saying that both the early 90s Orange Clockwork and Rockhopper have 1 1/8" threaded (although there are some pretty tall 1 1/8" threaded stems on ebay too).
I think I might just buy one and see if it fits. I should get my money back easily enough.
Currently my BB-to-saddle height is 33", my reach (measured as centre of seatpost to centre of hoods) is 30", and the hoods are 42" off the ground and an inch higher than the top of my saddle.
I'm still unsure if a similar position can be achieved on what is a rather smaller frame, even with the super-tall stems (remember that I'm using a super-tall Technomic stem to get into the above position anyway) - if the MTB frame is 20" rather than roadie's 25", with a horizontal top-tube, then the headset is going to be 5" lower...
Working this out with the 'Dirt Drop' stem, I reckon the bars will end up about 2" lower and 1.5" closer (shallower frame angle helps) than they are at the moment. However, the Dirt Drop stem takes a 1" threaded headset and I think I'm right in saying that both the early 90s Orange Clockwork and Rockhopper have 1 1/8" threaded (although there are some pretty tall 1 1/8" threaded stems on ebay too).
I think I might just buy one and see if it fits. I should get my money back easily enough.