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8 speed to 9 speed(5 posts)

8 speed to 9 speedMartin
Nov 1, 2001 10:10 AM
How can I make a smooth transition from shimano 8 speed to 9 speed. I have 3 bikes with 8 speed and one 9. Eight is dead, from what I can tell. As parts wear out, which pieces of 9 speed can I just throw on? For example, will a 9 speed shifter work, but just have one dead click? Is the cog spacing the same, allowing me to use a 9 speed derailuer? Can I put a 9 speed cassette on and just have a sprocket I can't shift into? Thanks!!!!!!
re: 8 speed to 9 speedvanzutas
Nov 1, 2001 12:01 PM
I don't think it will work piecemeal.
The main difference is that the cog spacing is different between 8 and 9. The cassettes are actually the same width but 9 has an extra cog in there. So, no you cannot just put on a 9 speed shifter and have an extra click. The chain on the 9 speed stuff in narrower as with the chainrings. (I think you MIGHT get away with keeping the old chainrings, but someone will sureley disagree)
The best thing to do is to buy the upgrade kit. These used to be in Nashbar. these have everything you need to go from 8 to 9 and nothing you don't.

In my opinion 8 is not dead. unless you have to change a major part, just stick with the 8 speed. I have been using a 9 speed rear deraileur on my 7 speed mountain bike for 2 years now so if your deraileur goes, maybe you can get away with a 9 speed.
Here's the bare minimumMel Erickson
Nov 1, 2001 1:09 PM
You can convert 8-9 speed with the following: New 9spd STI right lever, new 9spd cassette and new 9spd chain. You might find a used right hand lever or if you're very lucky a new one (left one damaged in shipping?) but most likely you'll have to buy the set. An 8 spd rear derailleur will work fine as will your crank and chainrings. Some bikes are more touchy than others and shifting may vary but it should work. I did this conversion with a new set of levers, chain and cassette. My shifting is as smooth and precise as my buddy with a full 9spd setup.

Why replace just a part at a time? This has the greatest possibility of things going awry. Your biggest cost will be levers. Wait til you can either afford them or they break, whichever comes first, then do it all. I certainly understand the itch to upgrade but 8spd is fine. You can still find plenty of new 8spd stuff. I upgraded because my right lever broke and I got a sweet deal on a pair of cosmetically damaged 9spd levers.
actually 9sp chain works on 8spcyclopathic
Nov 2, 2001 4:53 PM
drivetrain with possibly a bit slower front upshifts.

if you wear your chainrings, derailleurs, chain 9sp stuff would work on 8sp train just fine. Plenty 8sp cass if not Shimano SRAM.
Mel is right until you break levers stay with 8sp
Check this out....coonass
Nov 3, 2001 6:36 AM