has anyone ever tried using a 3 speed chainring/deraileur with a 3 speed internally geared rear hub? any advice or input would be appreciated,
fast eddie
fast eddie
3speed internal hub/front deraileur
- Thread starter fast eddie
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If you want to run something with a 3spd hub and three chain rings up front....
Try using and old rear der as a chain tensioner. Set the limits so it doesn't move, and is in line with the rear cog.
The rear der should pivot to take the chain slack.
This might be a good idea... Don't really know if it will work, but i have seen similar things.
Try using and old rear der as a chain tensioner. Set the limits so it doesn't move, and is in line with the rear cog.
The rear der should pivot to take the chain slack.
This might be a good idea... Don't really know if it will work, but i have seen similar things.
i didnt think of that,
the original post was from earlier tonight! im workin on the bike right now!
fast eddie
the original post was from earlier tonight! im workin on the bike right now!
fast eddie
I suppose I failed to factor in the coaster brake.
Not all internal gear hubs have coaster brakes though.
You could buy something fancy that might not use coaster.
Try taking off the coaster brake arm and use rim brakes...
The arm on the nexus can be removed and replaced with a spacer if i remember right.
Not all internal gear hubs have coaster brakes though.
You could buy something fancy that might not use coaster.
Try taking off the coaster brake arm and use rim brakes...
The arm on the nexus can be removed and replaced with a spacer if i remember right.
i have a 3 speed internal hub w/ freewheel, i hadnt thought of chain tension, but i suppose your right, the rear dearaileuer could stay stationary to kee chain tension, thats a good idea
fast eddie
fast eddie
my thinking was that a six speed is more practical than a 3 speed, but i have no idea how the 6 speed arrangement would effect or be different from just the 3 speed hub.
fast eddie
fast eddie
youd get extra ratio's like with derallier gears and have higher
but to me the appeal of three speed is having gears without the disadvantage of a messy derallier system cos' i really hate the noise of deralliers
it will work
i think they used to make twin rear cogs for the sturmey archer hubs so you could run 6 speed or 8 if you had a 4 speed hub
it would be quite fun to try though
but to me the appeal of three speed is having gears without the disadvantage of a messy derallier system cos' i really hate the noise of deralliers
it will work
i think they used to make twin rear cogs for the sturmey archer hubs so you could run 6 speed or 8 if you had a 4 speed hub
it would be quite fun to try though
oh yea, it would be nine speeds! man, that seems a bit much now that im thinkin about it!
fast eddie
fast eddie
Brompton folding bikes run two sprockets on a Sturmey 3spd hub to make six.
On my old mountain bike I experimented with a two speed 'manual' set up. Single ring, removed seven of nine sprockets and replaced them with spacers and fitted a Surly Singlator with two jockey wheels on it. I tuned the tension on the Singlator to work in both sprockets. It was 'manual' because I had to get off the bike and physically move the chain with my hand to shift gear but it worked and was one step up from a single speed for useability.
Sachs (now SRAM) used to make a 3X7, ie seven speed cassette fitted to a 3 spd internal hub.
On my old mountain bike I experimented with a two speed 'manual' set up. Single ring, removed seven of nine sprockets and replaced them with spacers and fitted a Surly Singlator with two jockey wheels on it. I tuned the tension on the Singlator to work in both sprockets. It was 'manual' because I had to get off the bike and physically move the chain with my hand to shift gear but it worked and was one step up from a single speed for useability.
Sachs (now SRAM) used to make a 3X7, ie seven speed cassette fitted to a 3 spd internal hub.
there's also a lower limit to the ratio of front chain wheel to rear sprocket size. if it's too low, you'll put too much torque into the internals and kill them
i'm not certain, but i recall a figure of 2:1. they usually came with 48:18 for a 26" wheel.
whatever it is, if you use a 28 front to a 22 back, you'll shorten it's life
i'm not certain, but i recall a figure of 2:1. they usually came with 48:18 for a 26" wheel.
whatever it is, if you use a 28 front to a 22 back, you'll shorten it's life
ratina said:
that's been around for a while
they stopped making it years ago.
and i think i know why....
hub gears are allegedly expensive, heavy & inefficient
dérailleurs are vulnerable, short lived, exposed, ugly and put extra stress on the chain
however, there was a time when 3 or 4 gears was the maximum ratios that were available - but hubs come in 7,8,9 or 14 now
so, when you can now have many ratios enclosed in grease, who'd want the disadvantages of both systems? :?
and i think i know why....
hub gears are allegedly expensive, heavy & inefficient
dérailleurs are vulnerable, short lived, exposed, ugly and put extra stress on the chain
however, there was a time when 3 or 4 gears was the maximum ratios that were available - but hubs come in 7,8,9 or 14 now
so, when you can now have many ratios enclosed in grease, who'd want the disadvantages of both systems? :?
You'll still have to have a rear mech or at the very least a tensioner, which takes away the advantages of a hub gear.
But there was the Cyclo, made until 1981ish, or the Dacon Driver, which was made in the 90s and could take a Suntour freewheel. Both were designed for the Sturmey Archer AW 3 speed hub.
You'd do well listening to minimum gearing warnings on more sophisticated geared hubs, but the AW is legendarily tough, you don't need to worry about running one like that. And they're cheap secondhand, so even if you do kill one it's not the end of the world.
But there was the Cyclo, made until 1981ish, or the Dacon Driver, which was made in the 90s and could take a Suntour freewheel. Both were designed for the Sturmey Archer AW 3 speed hub.
You'd do well listening to minimum gearing warnings on more sophisticated geared hubs, but the AW is legendarily tough, you don't need to worry about running one like that. And they're cheap secondhand, so even if you do kill one it's not the end of the world.
Here..... I have the answer.... Just buy one of these...
A two speed crank to go with your three speed hub.... Then you got your 6 speeds.... Only set you back about $700
http://bikemag.com/av/flash/8-28-08-vid ... -overview/
http://www.bikemag.com/news/freshproduc ... erschmidt/
A two speed crank to go with your three speed hub.... Then you got your 6 speeds.... Only set you back about $700
http://bikemag.com/av/flash/8-28-08-vid ... -overview/
http://www.bikemag.com/news/freshproduc ... erschmidt/
