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#1
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Can Too High Gears be Lowered on SRAM Dualdrive?
Hi All!
Back safe and sound from Provence and first major tour on the recumbent trike. Among the technical issues I noticed, this trike, which has a 27-speed SRAM Dualdrive shifter (three SRAM gears that can be shifted at a standstill plus a derailleur with nine gears on it) is geared rather stiff. I spend a lot of time in I-1, and never practically go beyond III-6, even on the last day when I found myself on the Nationale 7, a dual carriageway where trikes fear to tread! Comfortable cruising on flat straight roads is at around III-4 or II-5. The last two gears seem so high that I cannot see a use for them, since at those speeds, downhill, I tend not to pedal anyway. My favorite upright also has a SRAM Dualdrive, but with only 7 plates on the derailleur. On this bike, I often use the highest gear. I should mention that the cranks have been changed on the trike which is now fitted with special short cranks, to go with my medium height. But I was told one effect of this is that the gears might go stiffer. The lowest gear is not really low enough to get me up my nightmare hill on the way to work. I have to push furiously and can only manage a few strokes before giving up to take a breather. Now I have heard of people apparently changing the plates on a derailleur to raise or lower the gear set. So I want to know, before I get in touch with the Darth, if the request is feasible, if it is easy or exorbitantly complicated to do, and what sort of price range are we talking about. I'm afraid also of disappointing my Darth, because when I bought the trike in November we were discussing fitting him with a Schlumpf Mountain Gear in addition to the SRAM. This would cost some 400€ extra, and of course would add weight and fiddle. Is this a better solution, or should I prefer substituting the original SRAM cassette for a lower version? Thanks for your opinions - you people are so helpful! EFR Back doing laundry in sweltering Isle de France |
#2
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Can Too High Gears be Lowered on SRAM Dualdrive?
Artemisia wrote:
Now I have heard of people apparently changing the plates on a derailleur to raise or lower the gear set. So I want to know, before I get in touch with the Darth, if the request is feasible, if it is easy or exorbitantly complicated to do, and what sort of price range are we talking about. Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) \\paul -- Paul M. Hobson ..:change the f to ph to reply:. |
#3
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Can Too High Gears be Lowered on SRAM Dualdrive?
Paul M. Hobson wrote:
Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) No front gears with a SRAM Dualdrive, though. EFR Ile de France |
#4
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Can Too High Gears be Lowered on SRAM Dualdrive?
Paul M. Hobson wrote: Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) Artemisia wrote: No front gears with a SRAM Dualdrive, though. No gears that you can change while riding, yes. But you have a crank with a chainwheel up front where the pedals are. Getting a smaller chainring will lower the gearing of all gear combinations and cost $25 to $40 (US). -- Paul M. Hobson ..:change the f to ph to reply:. |
#5
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Can Too High Gears be Lowered on SRAM Dualdrive?
Paul M. Hobson wrote:
No gears that you can change while riding, yes. But you have a crank with a chainwheel up front where the pedals are. Getting a smaller chainring will lower the gearing of all gear combinations and cost $25 to $40 (US). Cool! I'll try to find out more. EFR Ile de France |
#6
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Can Too High Gears be Lowered on SRAM Dualdrive?
Paul M. Hobson wrote:
Paul M. Hobson wrote: Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) Artemisia wrote: No front gears with a SRAM Dualdrive, though. No gears that you can change while riding, yes. But you have a crank with a chainwheel up front where the pedals are. Getting a smaller chainring will lower the gearing of all gear combinations and cost $25 to $40 (US). As Paul says... Roos' Dual-Drive equipped touring 'bent sports a 52 tooth front chainring if we're going to the NL, but a 42 tooth one at home where the hills are more freely available. Changing from the 52 to the 42 gives a ~20% reduction to each of the gears. There's no reason not to go /very/ low on a trike, as you're not going to have balance issues at low speed. Pete. -- Peter Clinch Medical Physics IT Officer Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net http://www.dundee.ac.uk/~pjclinch/ |
#7
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Can Too High Gears be Lowered on SRAM Dualdrive?
In ,
Peter Clinch tweaked the Babbage-Engine to tell us: Changing from the 52 to the 42 gives a ~20% reduction to each of the gears. There's no reason not to go /very/ low on a trike, as you're not going to have balance issues at low speed. Though you /may/ run out of traction, as I discovered to my cost 2/3 of the way up the Koppenberg a few years ago :-( -- Dave Larrington http://www.legslarry.beerdrinkers.co.uk I have a shell collection, have you seen it? I keep it scattered on the world's beaches. |
#8
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Can Too High Gears be Lowered on SRAM Dualdrive?
Peter Clinch wrote:
Roos' Dual-Drive equipped touring 'bent sports a 52 tooth front chainring if we're going to the NL, but a 42 tooth one at home where the hills are more freely available. That's interesting. Is it easy to swap around like that? I know Roos has the privilege of living with a seasoned bike expert, and perhaps is one herself, but in my case the Darth is quite a distance away. Does not the chain need shortening or lengthening when you change the spec on the chainring? EFR Ile de France |
#9
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Can Too High Gears be Lowered on SRAM Dualdrive?
Artemisia wrote:
Paul M. Hobson wrote: Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) No front gears with a SRAM Dualdrive, though. The chainring is a gear |
#10
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Can Too High Gears be Lowered on SRAM DualDrive?
Artemisia wrote:
Paul M. Hobson wrote: Should be possible to get a new 9spd cassette. Cheaper thing to do probably would be to simply get a smaller chainring (front gear) No front gears with a SRAM Dualdrive, though. Not as stock. However, if your trike has a derailer post, adding a triple crank and front shifter is easy (though likely a 100-200 Euros). However, Paul Hobson's suggestion of a smaller chainring is entirely sensible if you currently have high gears you never use. -- Tom Sherman - Holstein-Friesland Bovinia The weather is here, wish you were beautiful |
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