Mike.Ayling wrote:fixie wrote:baudman wrote:PiledHigher wrote:Something like this would also be an option, that budget would let you get a frame like this built up with some pretty good components.
CoMotion make stuff like this too - but I'd go with Gellie's before sourcing from O/S.
Not sure if they are still selling them in Australia but Trek had a very good one a couple of years ago that was not outrageously expensive and Pegasus top of the line road model was also very practical. And I would second the BikeFriday recommendation. I have seen one here in Melbourne and it is anything but a toy. I was impressed with its manouverability and the speed i saw it ridden at.
I would second the notion of some kind of drag brake for long hill descents. One of the issues with disk brakes on tandems is overheating of the disks and subsequent brake fade. I noticed that the Farren's Quad has huge disks and appears to cope well. Not sure if it has a drag brake as well.
Pegasus top of the line models have disc brakes.
There is a theory on braking on long descents that one should brake hard to reduce speed then let it roll again to allow the brakes to cool then brake hard again etc etc. I have yet to try this but it sounds logical.
Note that the concerns about disc brake overheating & fade are primarily limited to hydraulic brakes. Sustained use causes the fluid to boil which creates bubbles of vapour in the system and loss of pressure. All brakes will fade to some extent as heat builds up in the contact surfaces. You could also fit Shimano "IceTech" rotors; these have an aluminium core sandwiched between the stainless steel braking surface. The lower density of the alloy dissipates heat much more effectively than solid steel.