Rethinking SRAM Dual Drive
#27
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Guess I should ride it a bit more and make a note of what gears I actually use. Waiting for a new front 42 chainring at the moment. It was worn out and the new chain on it gave me a serious chainsuck several times on my last ride. Luckily no damage.
#28
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For those wondering how to place dual drive shifters on dropbars. The solution is very simple. All you need is an accessory bar with a 31.8 mm clamp such as the evo spacebar pictured here. This allows you to slide the 27 speed grip shifter over the bar with plenty of space to spare with your handlebars. Ive had no problems with the shifter using this setup
#29
Part-time epistemologist
Oki, but for now there is a MTB (biggest is 32t) at the back and 53, 42, 30 at the front and the total difference in teeth is not for the GS. I think if I make major changes (and keep a der setup) I`d go for two rings in the front instead of a corn cob in the back.
Guess I should ride it a bit more and make a note of what gears I actually use. Waiting for a new front 42 chainring at the moment. It was worn out and the new chain on it gave me a serious chainsuck several times on my last ride. Luckily no damage.
Guess I should ride it a bit more and make a note of what gears I actually use. Waiting for a new front 42 chainring at the moment. It was worn out and the new chain on it gave me a serious chainsuck several times on my last ride. Luckily no damage.
If you're using it for touring and aren't looking for say a narrower crank -- lower q-factor -- my take is that you get very little from going to a double. There is still lots of 9-speed stuff around. It's cheap and durable.
Good luck!
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Yep ... I'd call it a MTB cassette. An 11-28 ... raising the bottom end by about 10% ... should take care of the problem if you don't need such a low bottom. (this is a NWT ... right?) 30t chainring to a 28 rear will be something very close to 20 gear inches.
If you're using it for touring and aren't looking for say a narrower crank -- lower q-factor -- my take is that you get very little from going to a double. There is still lots of 9-speed stuff around. It's cheap and durable.
Good luck!
If you're using it for touring and aren't looking for say a narrower crank -- lower q-factor -- my take is that you get very little from going to a double. There is still lots of 9-speed stuff around. It's cheap and durable.
Good luck!
#31
Banned
Way back, sun tour had a 3 pulley RD. That took up the extra Chain slack by having the chain path less direct,
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
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Way back, sun tour had a 3 pulley RD. That took up the extra Chain slack by having the chain path less direct,
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
HA! brilliant.
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For those wondering how to place dual drive shifters on dropbars. The solution is very simple. All you need is an accessory bar with a 31.8 mm clamp such as the evo spacebar pictured here. This allows you to slide the 27 speed grip shifter over the bar with plenty of space to spare with your handlebars. Ive had no problems with the shifter using this setup
#34
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Really, really dont get why someone would fit trigger shifters on drop bars when racerace brifters work perfectly??
I prefer trigger shifters to gripshift. But drops and brifters are literally made for each other....
Only reason I can think of is cost as it doesnot require brifter purchase.
I prefer trigger shifters to gripshift. But drops and brifters are literally made for each other....
Only reason I can think of is cost as it doesnot require brifter purchase.
#35
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Thread Starter
I don't think brifters work 'perfectly' with SRAM DD.
Really, really dont get why someone would fit trigger shifters on drop bars when racerace brifters work perfectly??
I prefer trigger shifters to gripshift. But drops and brifters are literally made for each other....
Only reason I can think of is cost as it doesnot require brifter purchase.
I prefer trigger shifters to gripshift. But drops and brifters are literally made for each other....
Only reason I can think of is cost as it doesnot require brifter purchase.
#36
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Well they are fitted to bike fridays, dahons and terns (afaik) in this set up. I have 2 brifter dd mezzo conversions that work beautifully.
I feel a DD matched to brifters on bullbars is the ideal set up for fast commuting folders. I use bullbars with upright brake positions made from cut down drops turned upside down.
I feel a DD matched to brifters on bullbars is the ideal set up for fast commuting folders. I use bullbars with upright brake positions made from cut down drops turned upside down.
#37
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Hmmm. Ok.
Well they are fitted to bike fridays, dahons and terns (afaik) in this set up. I have 2 brifter dd mezzo conversions that work beautifully.
I feel a DD matched to brifters on bullbars is the ideal set up for fast commuting folders. I use bullbars with upright brake positions made from cut down drops turned upside down.
I feel a DD matched to brifters on bullbars is the ideal set up for fast commuting folders. I use bullbars with upright brake positions made from cut down drops turned upside down.
#38
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For those wondering how to place dual drive shifters on dropbars. The solution is very simple. All you need is an accessory bar with a 31.8 mm clamp such as the evo spacebar pictured here. This allows you to slide the 27 speed grip shifter over the bar with plenty of space to spare with your handlebars. Ive had no problems with the shifter using this setup
Last week I changed to the Hubbub Adapter that puts the Rohloff shifter on the end of my handlebar. See second attached photo. This gives me much better steering control when going slow in uneven terrain.
But if you are always on good pavement where it is easy to steer with one hand, then there is no problem with your shifter location.
#41
Part-time epistemologist
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A narrative on bicycle driving.
A narrative on bicycle driving.
#42
Banned
Quill stems for 1" threaded headsets are 7/8", and so are straight bars (other than the center)
you did not know this?
you did not know this?
#44
Senior Member
Thread Starter
25 months on...
Twenty five months on, and I've had absolutely no problems or issues with the SRAM DualDrive hub. The bike was bought second hand so the hub's been going for longer than that. No mis-shifts, no noises, no discernible resistance, no clickbox falling off, no maintainace woes, no adjustment, no nothing. The thing just works. Period/full stop.
#45
Banned
Advantage to Planetary gears is Down shifting while stopped ..
Rolling thru all 14 gears on My Rohloff can be done sitting at a stop sign..
and I havent yet tried to rig up a 'Stupid Low' on my Bike Friday with a 39-53 double crank..
still using it as a 16:53.
...
Rolling thru all 14 gears on My Rohloff can be done sitting at a stop sign..
and I havent yet tried to rig up a 'Stupid Low' on my Bike Friday with a 39-53 double crank..
still using it as a 16:53.
...
#46
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Thread Starter
You often trumpet the Rohloff, Bob, but time and time again--here and elsewhere--you fail to mention the unmentionables. A Rohloff costs a good $1,200 and weighs no less than 1,700 grams. By comparison, a SDD hub costs $135, and weighs 960grams. Sure, when you add up the weight of a cogset and derailleur, you're gonna be at around the weight of a Rohloff, but...but...you haven't paid no $1,200 for those 1,700 grams. At the price of a Rohloff you can buy--and replace--a SDD hub, RD & cogset five times! The sensible money is not on Rohloff. You (should) know that.
Last edited by Abu Mahendra; 12-26-16 at 06:45 PM.
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Funny this thread would come up as I have been riding in deep light snow on my Swift. On the unplowed bike trail with asphalt at the bottom and 9 inches of light snow once I got going I was able to keep going. I have a studded tire on the front however I have been using the bald 1.6" standard tire on the back and it is working fine. I had not come up with a spare back wheel to stud so I thought I would take it for a slippery spin with just the front studded and the slick in back. I am amazed at how well the slick works in back.
I was wishing I had lower than the 52/32 with the 406 wheel but most of the time I really like the 52/11 high gear. I only use it about 10 percent of the time but I use 7th gear a lot on the flats.
I was wishing I had lower than the 52/32 with the 406 wheel but most of the time I really like the 52/11 high gear. I only use it about 10 percent of the time but I use 7th gear a lot on the flats.
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Way back, sun tour had a 3 pulley RD. That took up the extra Chain slack by having the chain path less direct,
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
but the wrap up was equivalent to a longer direct distance between, swing with just 2 pulleys.
SRam or S-A now offer hybrid cassette and Internal gear Hubs in a single Unit....
Way Way Back[57] I had a 3 speed with a triple cog cluster and a triple crank ,
I did have 3 shift levers to use on the 3 cubed 27 'speed' Sears-Puch J C Higgins..
#49
Banned
Mountain drive crank + BSR 3 speed 2 planetaries , 3rd to 4th is also a double shift..
Crank low range , up to high range, + hub from high 3rd, to low , 1st, , and the inverse 4th to 3rd.
can be done simultaneously , at a slow bogged down in too high a gear on a hill and chainrings barely turning,
Because both are planetary gears , the chain never has to be pushed off 1 cog or chainring to another..
Fwiw R'off does a similar double shift between 7th & 8th.. sequenced internally.
[my father, right after I went in the US Navy , 1966, (HS grad,> viet nam war conscription time) , gave my 3 cubed bike
to the son of a family friend , who promptly let it be stolen]
Crank low range , up to high range, + hub from high 3rd, to low , 1st, , and the inverse 4th to 3rd.
can be done simultaneously , at a slow bogged down in too high a gear on a hill and chainrings barely turning,
Because both are planetary gears , the chain never has to be pushed off 1 cog or chainring to another..
Fwiw R'off does a similar double shift between 7th & 8th.. sequenced internally.
[my father, right after I went in the US Navy , 1966, (HS grad,> viet nam war conscription time) , gave my 3 cubed bike
to the son of a family friend , who promptly let it be stolen]
#50
Banned
BTW, used R'off hubs sell for less than full retail ..their robust design makes them a safer buy than a used CF bike/frame.
Got my Koga WTR, whole bike, relatively cheap, only had to get the external oil seals replaced..
(picked up a used Hub and rebuilt the wheel to keep the transportation function going)
Got my Koga WTR, whole bike, relatively cheap, only had to get the external oil seals replaced..
(picked up a used Hub and rebuilt the wheel to keep the transportation function going)