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ghost shifting problem, advice needed(5 posts)
|ghost shifting problem, advice needed||maximum15|
Jun 2, 2003 5:31 PM
|I have taken an 1988 7 speed Bianchi and put an Ultegra double (current vintage) up front as well as Ultegra 9 speed cassette. Please don't lecture me about dumping too much money in an old bike - I'm learning that lesson and don't mind too much. Anyway, chain is a new SRAM 89R. Cassette and chainrings in good condition. First day out with the new setup and cassette is jumping up and down a gear. Worse on the outer gears, hardly ever happens in the middle of the cassette. The 7 speed indexed downtube shifter has been adjusted for the innermost 7 gears of the cassette as I don't really need the outer two. I am guessing the ghost shifting is due to the slight difference in 7 (126mm spacing) and 9 speed cassette spacings? Could I switch from indexed to friction shifting and lose the problem? Is friction shifting on the rear just a matter of getting used to it or will I be struggling to get the positioning just right? Or should I pick up a 9 speed rear derailler from ebay? Bike is used for commuting and some longer rides -- steel is so nice after a few days on aluminum!!!|
Jun 2, 2003 5:48 PM
|Is there a lever on the shifter you can turn to switch the index off? Try twisting the fastener to see if it will let you do this.My old Campy shifter was friction only when I went to shimmano I used to turn the index off! I actually liked to feel it better than have it click!
Friction shifters are awesome I think every cyclist should ride them at one time or another!The derailleur should not matter if you are manually controling them,so turn off the indexer on your shifter.As for a friction shifting 9 speed I dont know how hard it is to fine tune, the most gears I manually controlled were 7.But 9 should not be that bad!
Jun 2, 2003 6:13 PM
|You will have a difficult time using friction levers with 9s cassette. The cogs are so close together that it's hard to find the right spot where the chain will run quietly. It's a little easier if you get an older lever that pulls a real small amount of cable for the same lever movement. Indexed levers tend to pull a lot of cable for small amount of lever movement.
Another solution is to respace the casstte to 8s spacing, which is the same as 7s.
Jun 2, 2003 7:21 PM
|"You will have a difficult time using friction levers with 9s cassette" Sorry but that is not the truth, I know several guys that are doing just that, with no difficulty|
Jun 2, 2003 8:00 PM
|For some reason I thought 9 speed was not hard to do!
I totally forgot about the TT bike I rode last year!
It had 9 speed indexed shifters in the bar ends and I remember clicking the damn things off and doing it manually!
I had 100% no problem at all!