Join Date: Aug 2005
Bikes: Trek, Cannondale Tandem, Surly LHT
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To determine number of brifter speeds, first shift to highest gear (smallest cog), releasing all of the tension on the cable, then remove cable from RD. Now start clicking brifter, counting the number of clicks. If it's not broken, that will tell you how many speeds. 7 clicks = 8 speeds.
Several possibilites as to why it might not be shifting properly (easiest and least expensive first).
1. Cable sticking at BB guide.
2. Cable needs cleaning/replacing/adjusting.
3. RD hanger bent.
4. RD needs cleaning, adjusting, lubing or replacing if worn out or damaged.
5. Replace chain.
6. Cassette needs replacing.
7.Possible problem with brifter, but not likely.