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When upgrading from 8 to 9 speed...

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When upgrading from 8 to 9 speed...

Old 03-12-06, 05:56 PM
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Portis
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When upgrading from 8 to 9 speed...

Components that have to be changed:

1. Crankset

2. Cassette

3. Front Derailleur

4. Shifters

5. 9 sp. chain


I'm pretty sure about all of them except #3. Will 8 speed derailleur work on 9 speed setup?
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Old 03-12-06, 06:01 PM
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An 8 speed FD will work on a 9 speed setup, although it won't perform as well as a true 9 speed FD.
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Old 03-12-06, 06:18 PM
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Your current 8-speed crank will probably work well with the other 9-speed items. The essentials are:

Shifters
Cassette
Chain
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Old 03-12-06, 06:28 PM
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I don't think you need to replace the entire crankset if at all. You might want to replace the inner/middle ring(s) to "close up" the spacing but many people ride with 8-speed cranksets on an otherwise 9-speed drivetrain setup with no problems. Their front shifting might not be absolutely smooth but it will still work. Likewise, as others have said, your 8-speed FD will also work fine although not as good as one with a slightly narrower cage made for 9-speed. So the minimum parts that would need to be replaced is:
  1. Shifters
  2. Cassette
  3. Chain
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Old 03-12-06, 06:46 PM
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When i made the switch I replaced:

Shifters
Chain
Casette
Rear derailleur (was time for a new one anyway)
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Old 03-12-06, 07:11 PM
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Double or triple?

I've not done a double conversion but I'm told that an 8-speed front derailleur will work.

I have done a triple conversion. The existing triple crank worked OK but i had to install a 9-speed front derailleur to get satisfactory front shifting.
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Old 03-12-06, 07:48 PM
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shifters
cassette
chain
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Old 03-12-06, 08:12 PM
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I just upgraded my triple-based 8 speed setup to 9 speed. I already had a 9 speed FD and RD installed on the bike when I was on 8 speed, so all I really did was upgrade the shifters, chain, and cassette. I'm still running the 8 speed cranks, and aside of a little bit of a hesitation moving to the big chainring, the front shifts fine.
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Old 03-13-06, 03:37 AM
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Originally Posted by Ranger
Components that have to be changed:

1. Crankset

2. Cassette

3. Front Derailleur

4. Shifters

5. 9 sp. chain


I'm pretty sure about all of them except #3. Will 8 speed derailleur work on 9 speed setup?
The real question is do you have Campy or Shimano. Shimano is real easy. All you need is new brifters, cassette and chain. Campy you need a 9 speed Ergo gear about $35, a Wheels MFG 8-9 speed conversion kit and a new chain. The best way to do your Campy is to swap out your old 8 speed cassette hub with a new silver 9/10 speed version. That allows you to use 9 speed cassettes, which is easier than the Wheels conversion. Or you can have a 9/10 speed rear hub laced to you existing rim. More expensive but a better alternative in the long run. Whatever you do good luck.

Tim
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Old 03-13-06, 10:25 AM
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Originally Posted by HillRider
Your current 8-speed crank will probably work well with the other 9-speed items. The essentials are:

Shifters
Cassette
Chain
That's correct, except i would delete the word "probably" and add handlebar tape to the list. Make sure you get 9-speed compatible handlebar tape, or the bike will be unsafe to ride.

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Old 03-13-06, 11:45 AM
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Originally Posted by Sheldon Brown
That's correct, except i would delete the word "probably" and add handlebar tape to the list. Make sure you get 9-speed compatible handlebar tape, or the bike will be unsafe to ride.
I knew that a 9 spd crankset would work on 8 because that is what i am running, but wasn't sure about the other way. I have a question on this however. Has there been any study on whether using a 9 speed crankset with an 8 speed chain can accelerate chain wear?

ON another subject, ever since i changed my crankset from 8 speed to 9 spd on my 8 speed drive train, i have been wearing out chains faster. I can't figure out why. I track the mileage down to the mile and am lucky to get 700 miles before serious wear. (Park Tool Chain Checker.)

The only other thing i changed was that the middle ring is now 32 tooth when before it was a 34. This causes me to run the chain on the outer cogs on the cassette, since i am normally in the middle ring. Several "experts" have told me that this can't cause quicker chainwear but I am not convinced.

Something changed. I ride the same roads, on the same bike and my chains now wear out at least 300-500 miles earlier than before. I didn't change my maintenance. I contend that the smaller cogs wear faster than the larger ones. After they wear, they in turn wear the chain faster.

That is the only possiblity other than the possiblity that a 9 speed crankset could be causing it. There really aren't that many other variables.

Here I am at mile 775. This chain was new a couple months ago.


Last edited by Portis; 03-13-06 at 02:35 PM.
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Old 03-13-06, 01:50 PM
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Originally Posted by Ranger
...ever since i changed my crankset from 8 speed to 9 spd on my 8 speed drive train, i have been wearing out chains faster. I can't figure out why. I track the mileage down to the mile and am lucky to get 700 miles before serious wear. (Park Tool Chain Checker.)

The only other thing i changed was that the middle ring is now 32 tooth when before it was a 34. This causes me to run the chain on the outer cogs on the cassette, since i am normally in the middle ring. Several "experts" have told me that this can't cause quicker chainwear but I am not convinced.

Something changed. I ride the same roads, on the same bikes and my chains now wear out at least 300-500 miles earlier than before. I didn't change my maintenance. I contend that the smaller cogs wear faster than the larger ones. After they wear, they in turn wear the chain faster.
I would agree. Just going from the 34 to the 32 if you continued to ride in the same rear sprockets probably wouldn't make a huge difference, but if this encourages you to spend more time in the smaller rear sprockets, I would definitely expect more rapid wear.

If you're just changing the chain and your cassette is already worn, running a new chain on a worn cassette will also lead to increased chain "stretch."

See: http://sheldonbrown.com/chains

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Old 03-17-06, 03:01 PM
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Originally Posted by Sheldon Brown
That's correct, except i would delete the word "probably" and add handlebar tape to the list. Make sure you get 9-speed compatible handlebar tape, or the bike will be unsafe to ride.

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I am in the process of doing a 10 speed conversion, but I can't find any 10 speed handlebar tape. I have looked everywhere. I have found 8 speed, 9 speed and even found some old 6 speed tape on Ebay. Do you know anywhere that carries 10 speed handlebar tape?
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Old 03-17-06, 03:12 PM
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Originally Posted by Sheldon Brown
That's correct, except i would delete the word "probably" and add handlebar tape to the list. Make sure you get 9-speed compatible handlebar tape, or the bike will be unsafe to ride.
Actually, I re-used my old 8-speed bar tape over the new 9-speed shifters.....fit perfectly and no handling issues.....
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Old 03-17-06, 03:29 PM
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Originally Posted by CardiacKid
I am in the process of doing a 10 speed conversion, but I can't find any 10 speed handlebar tape. I have looked everywhere. I have found 8 speed, 9 speed and even found some old 6 speed tape on Ebay. Do you know anywhere that carries 10 speed handlebar tape?
I'm the only person that i know of that makes it. I'll sell you some for the right price.
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Old 03-17-06, 04:12 PM
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Originally Posted by CardiacKid
I am in the process of doing a 10 speed conversion, but I can't find any 10 speed handlebar tape. I have looked everywhere. I have found 8 speed, 9 speed and even found some old 6 speed tape on Ebay. Do you know anywhere that carries 10 speed handlebar tape?
I've got a bunch of rolls sitting around. PM me for more info.
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