|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Another curiosity question
While riding on Cape Cod this weekend, my co-star came up with an
interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? Thanks, Tom Weaver |
Ads |
#2
|
|||
|
|||
Another curiosity question
Tom Weaver wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? Left is rear and right is front? That's odd. Even odder is that your rear sprockets are larger further from the frame. On traditional shifters like downtubes and bar ends, the left lever controls the front derailer, and moving it 'up' move to a larger ring/higher gear. Whereas with the right shifter, moving it up also moves to a larger sprocket, but that makes for a lower gear. We all need to convert to Rolholf 14s. |
#3
|
|||
|
|||
Another curiosity question
On Sun, 05 Jun 2005 21:40:18 -0400, Tom Weaver
wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? Thanks, Tom Weaver I just got Brifters last month on a bike. I had always had Barcon shifters before. I had a bit little confusion during shifting with the new equipment. Just remember that the big lever shifts to big gears and the smaller shifter shifts to the smaller gears. Well it works for me anyway. |
#4
|
|||
|
|||
Another curiosity question
On Sun, 05 Jun 2005 21:40:18 -0400, Tom Weaver
wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. Huh? How's that again? The *larger* ring is *closer* to the frame? -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#5
|
|||
|
|||
Another curiosity question
"Tom Weaver" (clip) Why do the front and rear shifters work opposite to each other? (clip) ^^^^^^^^^^^^^^ A couple of others have mentioned possible confusion regarding which rings and cogs are closest to the frame, so I will leave that alone. I would like to answer the question I have clipped from your post. Front and rear shifters work opposite, in the sense that the motion on the rear shifter that gears you down does the opposite on the front shifter. This is because going to a larger sprocket, front or rear requires more force than dropping to a smaller one. For this reason, shifting "larger" is always done with cable tension, and going the other way is done by creating cable slack, allowing a spring to do the work. Following this rule, you downshift in the rear with tension, and upshift in the front with tension. It's the SAME in terms of the mechanism, and OPPOSITE in therms of effect. |
#6
|
|||
|
|||
Another curiosity question
"Brian Huntley" wrote:
Tom Weaver wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? Left is rear and right is front? That's odd. Even odder is that your rear sprockets are larger further from the frame. odd but not impossible: http://venus.wsb-nlu.edu.pl/~lpason/uni/kaseta.jpg -- marcin www.enduro.95mb.com |
#7
|
|||
|
|||
Another curiosity question
Marcin J. wrote:
odd but not impossible: http://venus.wsb-nlu.edu.pl/~lpason/uni/kaseta.jpg Or even: URL:http://www.legslarry.beerdrinkers.co...y/002front.jpg On which, incidentally, the front shifter is controlled by the right hand... -- Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/ Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger Badger |
#8
|
|||
|
|||
Another curiosity question
On Sun, 05 Jun 2005 21:40:18 -0400, Tom Weaver
wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? How about it takes more leverage to pull against the springs and cables of the derailleurs than it does to release the springs? The larger lever gives you better leverage. |
#9
|
|||
|
|||
Another curiosity question
Tom Weaver wrote: While riding on Cape Cod this weekend, my co-star came up with an interesting (to me) question: Why do the front and rear shifters work opposite to each other? Further explanation. We both have Ultegra integrated shifters. On the right (front), clicking the larger shifter moves the chain to a larger ring closer to the frame. On the left (rear), clicking the larger lever moves the chain to a larger ring that is further from the frame. Why don't both larger levers move the chain the same direction? Thanks, Tom Weaver They don't the big lever of each moves the chain to a bigger cog or chainring. As for same direction, the 'low normal' or 'backfire plus' MTB rear ders from shimano do this. Hope this silly idea doesn't come to road stuff. |
#10
|
|||
|
|||
Another curiosity question
'Twas not always thus...at least, from an interface perspective. The
10-speed I had back in the bad old days had a Suntour (I think) FD that was reverse-action, so that both levers were set up to move in the same direction for "harder" gears. Shimano now makes reverse-action rear derailers ("Rapid Rise") that allow for the same sort of thing--I believe that these work against very stiff springs... |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Question for the anti-helmet guys | Harris | Techniques | 37 | October 7th 03 04:40 PM |