I doubt we'll see many road bikes with shaft drive, but there's plenty of commuters riding city/urban/cargo bicycles who would love one Pair it with a Rolhof hub gear and you've got a killer year round bicycle Sent from the astropathic choir.
I've not got a Rolhoff (would bloody love one!) So I didnt realise that it wouldn't work A belt is a damn good substitute though
I built a shaft driven bike while I was at university - inspired by the BMW motorbike design where the single sided rear sub frame is the support structure for the shaft - no traditional triangular seat and chainstays. This had a couple of advantages such as completely enclosing the drivetrain and allowing easy access to the tyres to fix a puncture. It was heavy and inefficient though - the shafts work nicely if you've got plenty of power to play with and can suffer some losses but the gears need to be large to handle the amount of torque on a bike. I couldn't integrate gears or brakes into it either, so real world applications were limited...I've used an 8 speed Shimano Alfine gear hub for a few hundred miles (on a Mike Burrows Recumbent ) and that was very nice but still quite hefty. The 11 speed version should be better - helical gears and an oil bath instead of grease should make it quieter and it's got almost as much range as the Rohloff for quite a lot less money. There are reports that it's not as robust as the 8 speed version though.The Gates carbon belt drives have their issues such as the belts slipping under load and needing to feed the belt through the frame. The ultimate reliable bike for me would be a fixed gear with mudguards and disc brakes, maybe with a chain case. I've ridden thousands of miles on fixed over the last 8 years or so and with regular maintenance (chuck the chain away every 3000 miles, new cog every 6000 and a new ring every 12000 or so) they just keep going.
Quote from: hiraethus on July 22, 2014, 09:46:21 AMI built a shaft driven bike while I was at university - inspired by the BMW motorbike design where the single sided rear sub frame is the support structure for the shaft - no traditional triangular seat and chainstays. This had a couple of advantages such as completely enclosing the drivetrain and allowing easy access to the tyres to fix a puncture. It was heavy and inefficient though - the shafts work nicely if you've got plenty of power to play with and can suffer some losses but the gears need to be large to handle the amount of torque on a bike. I couldn't integrate gears or brakes into it either, so real world applications were limited...I've used an 8 speed Shimano Alfine gear hub for a few hundred miles (on a Mike Burrows Recumbent ) and that was very nice but still quite hefty. The 11 speed version should be better - helical gears and an oil bath instead of grease should make it quieter and it's got almost as much range as the Rohloff for quite a lot less money. There are reports that it's not as robust as the 8 speed version though.The Gates carbon belt drives have their issues such as the belts slipping under load and needing to feed the belt through the frame. The ultimate reliable bike for me would be a fixed gear with mudguards and disc brakes, maybe with a chain case. I've ridden thousands of miles on fixed over the last 8 years or so and with regular maintenance (chuck the chain away every 3000 miles, new cog every 6000 and a new ring every 12000 or so) they just keep going.I mentioned fixed gear bike above as like you say they are very reliable and almost maintenance free i trained on a fixed gear back in the late 80's till around 96 and loved them,did buy one a few years back but found it harder this time switching from fixed to free geared bike,ive got a 1950's falcon in my shed that one day ill build my ideal winter hack fixie,its been in my shed for about 8 years next to my zaskar project mike burrows the man who built boardmans lotus bike very cool,saw him at cyclex many years ago
Bicycles were certainly built better then