Thumb shifters

From my Deore rebuild guide, the spring hole in the indexing plate creates an 8th click beyond 1st:

DeoreRightThumbshifter-06.jpg


The cog spacing of a Shimano 8 speed cassette is slightly less than a 7 speed (4.8mm vs 5mm) but many people report Deore's work well enough. The article below shows how you can increase or reduce the travel of the mech per click by mounting the cable in different ways, which opens up some interesting but unholy combinations:

http://www.ctc.org.uk/cyclists-library/components/transmission-gears/derailleur-gears/shimergo

cablerouting-alt.jpg

hubbubmech.jpg


Suntour 8 speed cassettes are mostly 5mm and partly 4.8mm so they could get away with making some combined 7/8 speed shifters (because most of the cassette is the same for both, with only the few smallest gears slightly off). So a Suntour 8 speed shifter is a slighty better option than Deore's with a Shimano 8 speed cassette... Not perfect but good enough for Kona to sell this combo from the factory :wink:
 
We_are_Stevo":2wibf03v said:
There was a very good thread in the run up to Christmas about thumbies with 'exploded' photo's showing the actual drilled washer that provides the indexing; and how easy it would be to drill an additional 'detent' to give a genuine 8-speed DX/XT thumbie...

...Note to self: Remember to bookmark interesting/informative threads for future ref :oops:

This one?
http://www.retrobike.co.uk/forum/viewtopic.php?t=231167&highlight=suntour

And this one?
http://www.retrobike.co.uk/forum/viewtopic.php?t=231399&highlight=suntour
 
Inzaman":3qsga6b1 said:
We_are_Stevo":3qsga6b1 said:
There was a very good thread in the run up to Christmas about thumbies with 'exploded' photo's showing the actual drilled washer that provides the indexing; and how easy it would be to drill an additional 'detent' to give a genuine 8-speed DX/XT thumbie...

...Note to self: Remember to bookmark interesting/informative threads for future ref :oops:

This one?
http://www.retrobike.co.uk/forum/viewtopic.php?t=231167&highlight=suntour

And this one?
http://www.retrobike.co.uk/forum/viewtopic.php?t=231399&highlight=suntour

Much obliged... 8)
 
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