What number of clicks for SIS?
01-20-19 | 01:13 PM
#1
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What number of clicks for SIS?
I confused myself. My 1050 shifters have 5 honest clicks but they are currently shifting just fine up to the 7th cog and they stay put. And I have some 6400 shifters with 6 honest clicks but it feels like they have another position and could shift up onto an 8th cog if I asked them too. What is the deal?
jeff
jeff
01-20-19 | 02:56 PM
#2
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Shifters will have one less click/detent than the number of gears, you have to count the starting position as 1. Generally Shimano shifters will index one gear past with varying degreees of success.
I think I've only ever setup one bike like that and had it shift perfect, was a 7spd XT thumb shifter running an 8spd cassette if I recall.
I think I've only ever setup one bike like that and had it shift perfect, was a 7spd XT thumb shifter running an 8spd cassette if I recall.
01-20-19 | 03:08 PM
#3
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Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Shifters will have one less click/detent than the number of gears, you have to count the starting position as 1. Generally Shimano shifters will index one gear past with varying degreees of success.
I think I've only ever setup one bike like that and had it shift perfect, was a 7spd XT thumb shifter running an 8spd cassette if I recall.
I think I've only ever setup one bike like that and had it shift perfect, was a 7spd XT thumb shifter running an 8spd cassette if I recall.
But I don't think there are any other examples of "extra-click" SIS shifters, especially among road shifters.
My CX race bike has run 7s XT levers with an 8s cassette for over two decades, and I did slightly modify the spool groove diameter for better indexing with an 8s XTR cassette, and it's been race-day reliable over all of these years.
01-20-19 | 03:18 PM
#4
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You're right about the XT- and perhaps Deore-level thumb shifters, even the 6s version had 7 solid detents.
But I don't think there are any other examples of "extra-click" SIS shifters, especially among road shifters.
My CX race bike has run 7s XT levers with an 8s cassette for over two decades, and I did slightly modify the spool groove diameter for better indexing with an 8s XTR cassette, and it's been race-day reliable over all of these years.
But I don't think there are any other examples of "extra-click" SIS shifters, especially among road shifters.
My CX race bike has run 7s XT levers with an 8s cassette for over two decades, and I did slightly modify the spool groove diameter for better indexing with an 8s XTR cassette, and it's been race-day reliable over all of these years.
01-20-19 | 03:42 PM
#5
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^^^ I bought a used bike so equipped. '89 Trek 800, which shipped as an 18-speed with a freewheel and thumbies. PO took it to a bike shop to replace the rear wheel, and they installed one not only with a 7-speed cassette, but 135-mm OLD. They just spread the triangle to force the wheel on. And indeed, it did just BARELY managed to hit on all seven with the "ghost" position, albeit not very well. (Okay, not well at all...) Fortunately I found 130-mm wheel and 6-speed freewheel for it; works MUCH better with the proper kit.
