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08-03-2004, 08:42 AM
| #21 (permalink) |
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| Re: 7 to 8 Speed ChronoFish wrote: > I currently have a 1996/1997 Cannondale R300 that has been > slowly "upgraded" and transformed into a tri bike over time. > > The rims on the wheels are grooved and should probably be > replaced at the end of the season if not sooner. While > doing so I would like to move up to an 8-speed cassette. > > Why 8? The thought is that it would give me one more gear > choice while allowing me to keep my current drive train. Is > this the correct assumption? Yes, but the same is true of 9. 8-speed is a bit of a dead end, and I would advise against it. > The current setup of a older 105 rear derailleur with > bar-end shifters mounted on aerobars in friction setting > (rather than STI) works quite well I am very happy with it. > However the 11-21 cluster is a bit of a challenge (for me) > on steeper hills. > > I was hoping to focus more of my money on the wheels - > something like a pair of Aerospokes with an 8-speed (11-26 > or something similar) without having to upgrade the > rear-derailleur, chain, and therefore crankset (in other > words the entire drivetrain). You don't need to change that much stuff. To convert to 9-speed friction, all you need is the new rear wheel with a 9-speed cassette and suitable chain. (You should always replace the chain when you install a new cassette.) If you want go to with indexing, you'll also need to replace the shifters. The 9-speed Dura-Ace bar-end shifters had been in very short supply, but we just received a large shipment of them. See: [Only registered and activated users can see links. ] You don't need to replace derailers or chainrings, the ones you have will work fine. Sheldon "Upgrades" Brown +-----------------------------------------------------+ | We can complain because rose bushes have thorns, | | or rejoice because thorn bushes have roses. | | --Abraham Lincoln | +-----------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 [Only registered and activated users can see links. ] Hard-to-find parts shipped Worldwide [Only registered and activated users can see links. ] [Only registered and activated users can see links. ] |
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08-03-2004, 06:32 PM
| #27 (permalink) |
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Posts: n/a
| Re: 7 to 8 Speed On Wed, 04 Aug 2004 00:52:06 +0000, Brad Hubbard wrote: > Sheldon Brown wrote: > >> If you want go to with indexing, you'll also need to replace the >> shifters. > > Pardon my ignorance but what's indexing? > > TIA, > Brad "clicky" shifting, where the shifter, when adjusted properly, clicks through a number of indents instead of having a smooth travel. Each indent precisely lines the derailleur cage up with the appropriate cog. With friction shifting, you have to rely on "feel" to make sure the gear is properly aligned, using your feel, ear, and sometimes a glance back at the cage (be careful LOL). |
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08-03-2004, 06:32 PM
| #28 (permalink) |
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Posts: n/a
| Re: 7 to 8 Speed On Wed, 04 Aug 2004 00:52:06 +0000, Brad Hubbard wrote: > Sheldon Brown wrote: > >> If you want go to with indexing, you'll also need to replace the >> shifters. > > Pardon my ignorance but what's indexing? > > TIA, > Brad "clicky" shifting, where the shifter, when adjusted properly, clicks through a number of indents instead of having a smooth travel. Each indent precisely lines the derailleur cage up with the appropriate cog. With friction shifting, you have to rely on "feel" to make sure the gear is properly aligned, using your feel, ear, and sometimes a glance back at the cage (be careful LOL). |
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08-03-2004, 06:32 PM
| #29 (permalink) |
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Posts: n/a
| Re: 7 to 8 Speed On Wed, 04 Aug 2004 00:52:06 +0000, Brad Hubbard wrote: > Sheldon Brown wrote: > >> If you want go to with indexing, you'll also need to replace the >> shifters. > > Pardon my ignorance but what's indexing? > > TIA, > Brad "clicky" shifting, where the shifter, when adjusted properly, clicks through a number of indents instead of having a smooth travel. Each indent precisely lines the derailleur cage up with the appropriate cog. With friction shifting, you have to rely on "feel" to make sure the gear is properly aligned, using your feel, ear, and sometimes a glance back at the cage (be careful LOL). |
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08-03-2004, 06:32 PM
| #30 (permalink) |
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Posts: n/a
| Re: 7 to 8 Speed On Wed, 04 Aug 2004 00:52:06 +0000, Brad Hubbard wrote: > Sheldon Brown wrote: > >> If you want go to with indexing, you'll also need to replace the >> shifters. > > Pardon my ignorance but what's indexing? > > TIA, > Brad "clicky" shifting, where the shifter, when adjusted properly, clicks through a number of indents instead of having a smooth travel. Each indent precisely lines the derailleur cage up with the appropriate cog. With friction shifting, you have to rely on "feel" to make sure the gear is properly aligned, using your feel, ear, and sometimes a glance back at the cage (be careful LOL). |
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