Drivetrains for Big Dummy
01-15-09, 08:38 AM
#126
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Morgan was speculating that this might work though. https://www.kore-usa.com/old_site/dreactor.htm
Now trying to purchase this item in Germany...
Regards, Phil
01-15-09, 10:32 AM
#127
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i've been reading some good feedback on the alfine hub used for mtn biking. i don't think it's officially recommended for it, but seems like it might be tough enough for mtn/utility use.
the nuvinci also sounds interesting, altho i seem to recall it is very heavy(?) not sure how heavy but on a utility bike it don't matter anyway.
the nuvinci also sounds interesting, altho i seem to recall it is very heavy(?) not sure how heavy but on a utility bike it don't matter anyway.
01-16-09, 01:15 AM
#129
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In practice, its not that heavy. When you ride the bike, you don't feel the weight and on a utility bike, you're not going to be racing so the hub weight isn't a concern.
01-16-09, 10:53 AM
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The truth? I wouldn't want it on a road bike. Far too heavy. I have it on a Peugeot Puymorens PX 10 converted into a Peugeot PX 50 Porteur bike with 650B wheels and for the utility application, the hub is serviceable. But I wouldn't recommend it if you're not going to use it as a commuter.
Last edited by NormanF; 01-16-09 at 10:59 AM.
01-22-09, 01:30 PM
#134
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Success! Got the DMR STS tensioner and it fits perfectly. Should get the rest of this bike done tomorrow and hopefully get some miles done over the weeekend.
01-22-09, 01:33 PM
#135
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Good to know. I look forward to hearing how you like the hub once you get it rolling.
02-18-09, 11:09 AM
#136
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hey looks like Nuvinci have posted a gear inches comparison on their site
https://www.fallbrooktech.com/Docs/Ge..._011309Web.pdf
https://www.fallbrooktech.com/Docs/Ge..._011309Web.pdf
02-18-09, 11:37 AM
#137
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Cool. I saw that the other day and didn't realize it was new. It's a nice graph, and it shows what I had pretty much figured using Sheldon's gear calculators: that with my current set-up, closest, I imagine, to the mountain triple, the Nuvinci will take my two lowest gears away from me and possibly my highest (running a single chainring). Given how often I use those low gears and my highest gear, I could probably live with a single, but since I'm going to try for a double, I should be able to break the sound barrier.
Or my legs.
Actually, seeing it all laid out graphically like that does make me reconsider my outer chainring size. They went with a 12 teeth difference and got to an upper limit comparable to a road bike. I just went with the biggest outer ring I had easy access to, giving me a 16 teeth difference, and an upper range that I will probably never, ever come close to. Probably I'll have to estimate what percentage of the hub I'm using on the big chainring and scale down that outer ring accordingly so I can get more use out of it. I probably just need to figure out what constitutes stupid-hard gear inches and set my upper ring for that.
Or my legs.
Actually, seeing it all laid out graphically like that does make me reconsider my outer chainring size. They went with a 12 teeth difference and got to an upper limit comparable to a road bike. I just went with the biggest outer ring I had easy access to, giving me a 16 teeth difference, and an upper range that I will probably never, ever come close to. Probably I'll have to estimate what percentage of the hub I'm using on the big chainring and scale down that outer ring accordingly so I can get more use out of it. I probably just need to figure out what constitutes stupid-hard gear inches and set my upper ring for that.
