| Title: | Bicycling |
| Notice: | Bicycling for Fun |
| Moderator: | JAMIN::WASSER |
| Created: | Mon Apr 14 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 3214 |
| Total number of notes: | 31946 |
I have have just converted my bike from a six speed freewheel to a
seven speed cassette. The bike is a road one, with mostly Shimano
components. I ended up putting an entire new wheel in, rather
than just replacing the hub. The old wheel came with the bike and
didn't seem to be well assembled. It broke spokes with monotonous
regularity.
The six speed set up had indexed shifting. The seven speed doesn't,
due to the more closely spaced cogs, so it now uses friction shifting.
If I wanted to go to indexed shifting again I would need new shifters. Would
I need a new deraillier as well? The current one has the reach to get to
all seven cogs. The question is, is the deviation of the deraillier per
increment of cable travel the same for six and seven speed Shimano
derailliers? I could find this out with the try it and see approach, but
it would be nice to know first.
Jeremy
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2663.1 | PAKORA::GGOODMAN | Rippled, with a flat underside | Mon Aug 30 1993 09:07 | 5 | |
You *should* be able to, but don't quote me. I'll leave it to someone
who has already tried it...
Graham.
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| 2663.2 | NOVA::FISHER | US Patent 5225833 | Mon Aug 30 1993 09:19 | 14 | |
re: "deraileur deviation 6 sp vs 7"
No. When, e.g., Ultegra SIS supported 6 or 7 spd, there was a small
piece of plastic that went onto the shifter to allow for a slightly
different length of cable travel. It inserted into the slot that the
cable sits in so that the shifter would have a little larger effective
radius for 6 speed.
Dura Ace just sold different shifters and made the "old" ones
obsolete -- no surprise there.
Your mileage may vary.
ed
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| 2663.3 | Six speed deraillier works ok with 7spd indexing. | AYOV16::JDRAKE | _100% Fact Free Note | Wed Nov 17 1993 07:10 | 5 |
To answer my own question in the base note. I finally bought a
seven speed indexed gear lever. This seems to work fine with the six
speed deraillier and the seven speed cassette hub Shimano stuff.
Jeremy
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