Can't find a reference to that, can you link to it?Little Voice said:The hub I was talking about originally has a direct drive middle gear, 1st is lower for hills and 3rd faster.
Can't find a reference to that, can you link to it?Little Voice said:The hub I was talking about originally has a direct drive middle gear, 1st is lower for hills and 3rd faster.
john61ct said:Can't find a reference to that, can you link to it?Little Voice said:The hub I was talking about originally has a direct drive middle gear, 1st is lower for hills and 3rd faster.
The common three-speed hubs from Sturmey-Archer, SRAM and Shimano have a single-stage, simple planetary system, with the sun gear locked to the axle. Shifter parts direct power through the planetary system in either direction for step-up and step-down ratios, or drive the hub shell directly for the middle, unity ratio.
matmaxgeds said:Yes, a wider spaced 5 speed hub would be great! It really seems not popular as even something like the Pinion C6 has less than 300% range I think - I guess people worry about big jumps between gears a lot.
In terms of strength, I have also put a fair few (3,500km) of hard loaded (200kg) tandem miles on a Nuvinci 380 without any issues to date. It is just very heavy, a bit less efficient and less (380%) than the range the OP is after, but on the plus side, can do a good degree of shifting under load. I would also say that the usable range was more like 360% as it gets less efficient at the extremes but even that is enough to get over mountains if you don't need to go faster than say 20 mph.
I guess this is why they still sell lots of Rohloffs!
Little Voice said:matmaxgeds said:Then again you can get greater than 550% range on a 1x these days, maybe that just keeps it all simpler!
https://www.pinkbike.com/news/review-ethirteen-trs-12-speed-cassette-offers-a-whopping-556-range.html
I prefer the Box 2, 9 speed cassette for Ebikes, it is cheaper and packs one less gear into the same space allowing a thicker chain. 11-50 teeth sprockets.
Little Voice said:what lifetime meant, as Rohloff say 100,000 km or maybe more with careful use and regular maintenance.
john61ct said:No for sure, Rohloffs have proven to last a very long time, much longer than others all the rest being equal, and certainly in a high torque context.
Of course MTBF is an average WAG, but still. . .
matmaxgeds said:Little Voice said:matmaxgeds said:Then again you can get greater than 550% range on a 1x these days, maybe that just keeps it all simpler!
https://www.pinkbike.com/news/review-ethirteen-trs-12-speed-cassette-offers-a-whopping-556-range.html
I prefer the Box 2, 9 speed cassette for Ebikes, it is cheaper and packs one less gear into the same space allowing a thicker chain. 11-50 teeth sprockets.
Thanks - I didn't know about this one, I also much prefer 9 speed chains but had only seen 11-42 before.
OTOH, there are more teeth to take the force applied by the chain on a larger sprocket. So less material strength is needed. This is probably why we get away with having aluminum chain rings.Little Voice said:The Box 2's biggest sprocket is not steel and so best not to put too much power through it just in case.
Little Voice said:I am not too sure what MTBF and WAG stand for John61ct, care to clarify please?
wturber said:OTOH, there are more teeth to take the force applied by the chain on a larger sprocket. So less material strength is needed. This is probably why we get away with having aluminum chain rings.Little Voice said:The Box 2's biggest sprocket is not steel and so best not to put too much power through it just in case.
donn said:Little Voice said:I am not too sure what MTBF and WAG stand for John61ct, care to clarify please?
Mean Time Between Failure and Wild Ass Guess were my associations. Engineering terms of art.
john61ct said:Can't find a reference to that, can you link to it?Little Voice said:The hub I was talking about originally has a direct drive middle gear, 1st is lower for hills and 3rd faster.
minimum said:SA also has 5-speed "heavy duty" IGH:
http://www.sturmey-archer.com/en/products/detail/rx-rk5
Total gear ratio range may be a bit small but looking at the weight, the "heavy duty" might be worth it.
I have destroyed 2 Alfine-8's within last 1,5 months with cyclone3k/nucular. 1st lasted for more than year (until new controller) . Pawls disintegrated. I'm not sure it was due to bad shifting as I was (trying to be) careful when shifting, especially with 2nd one.
flat tire said:Letting off for shifts is lame.
Little Voice said:Not too sure what power, torque and gear range the SHIMANO STEPS E-BIKE Dedicated Mechanical Internal Geared Hub Disc Brake 5-speed can take.
Anyone found any more info on it please?
andrebandre said:Commuting on flat terrain mostly, on bad roads, but often against high winds.
Quick release is the skewer that goes through axle and allows wheels to be removed quick and easy, probably most common on road bikes.
Direct drive hub motors are not as easily removed because of the wires.
Dual drives are somewhere in between, i would say.
BBSHD is quite a though and versatile mid drive, it can take a lot of abuse without complaining.
The CYC seems even more so but it is too new so time will tell.