Nice light carbon fibre road bike that's been "scoble-fied" with rising stem, lots of spacers. A really high gear will probably make him sweat more than a low gear, with massive efforts required to get started and stop, ride hills etc. So best bet would be a very light bike, because they require the least effor to accelerate, ride up hill and so on, maybe some really deep carbon rims to help maintain at speed. Gears, maybe Campag Super Record, will mean he can always be in the right gear, so can trundle along at just the right cadence without raising a sweat.
Nice light carbon fibre road bike that's been "scoble-fied" with rising stem, lots of spacers. A really high gear will probably make him sweat more than a low gear, with massive efforts required to get started and stop, ride hills etc. So best bet would be a very light bike, because they require the least effor to accelerate, ride up hill and so on, maybe some really deep carbon rims to help maintain at speed. Gears, maybe Campag Super Record, will mean he can always be in the right gear, so can trundle along at just the right cadence without raising a sweat.