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Anonymous
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icecube57
10 MW
I don't think I've ever seen an upright bike done that way, but it is not uncommon to have that many or even *more* gears on a recumbent trike, if used in terrain that may require a lot of uphill work. I seriously considered it for my own bike, except that I need the motor even for normal use, and it's difficult to balance such a heavy bike at low enough speeds to make the really low gears useful--I'd have to do it on a trike.
I suppose the big difference is that it looks like SB's was geared for speed, rather than hill climbing, while on bent trikes it's used the other way round.
I suppose the big difference is that it looks like SB's was geared for speed, rather than hill climbing, while on bent trikes it's used the other way round.
gerhardt
100 mW
Hi,
I have 168 speeds in my Safety Delta E-Trike. The gear inches range from 15 to 200. The wide range of gears and 404/408 72 volt two speed front hub motor allows for a fun and leisurely ride at 35 mph. The low gear range is nice if you want to carry 100 lbs of groceries and tow a trailer up a hill. The final drive from the jackshaft is through a LH Nexus 8 speed hub. Normally I select one of the three chain rings and line the chain up straight with the jack shaft 7 gear input cluster. I then do most of my shifting with the Nexus. The E-motor is nice because I don't have to do a lot of shifting with the ring gear and jackshaft derailleurs. I also designed room to use a gear motor to drive a 8 speed hub in the RH rear wheel. I have not been able to find a suitable gear motor that will provide 1600 watts and 50,000 mile life. I attached a photo of the E-Trike.
Don Gerhardt
I have 168 speeds in my Safety Delta E-Trike. The gear inches range from 15 to 200. The wide range of gears and 404/408 72 volt two speed front hub motor allows for a fun and leisurely ride at 35 mph. The low gear range is nice if you want to carry 100 lbs of groceries and tow a trailer up a hill. The final drive from the jackshaft is through a LH Nexus 8 speed hub. Normally I select one of the three chain rings and line the chain up straight with the jack shaft 7 gear input cluster. I then do most of my shifting with the Nexus. The E-motor is nice because I don't have to do a lot of shifting with the ring gear and jackshaft derailleurs. I also designed room to use a gear motor to drive a 8 speed hub in the RH rear wheel. I have not been able to find a suitable gear motor that will provide 1600 watts and 50,000 mile life. I attached a photo of the E-Trike.
Don Gerhardt
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Drunkskunk
100 GW
gerhardt said:
