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| | Upgrading from 7 sp triple to 9 sp double - talk Forum at Duathlon.com |
 | | Besides the crankset, rear derailleur and shift levers, I think you may also need a new bottom bracket spindle, since the axle for a triple is longer to accommodate the extra chainring. |
 | | I don't know how much you are willing to spend on upgrading this bike, but if you check around - ebay, for example, or on the duathlon.com classified section (a much wiser choice!),you may be able to get a better deal on a newer bike, and still have your current bike for training. |
 | | IF the frame is steel and the rear dropout spacing is 126mm [like many older 7speed road bikes], Then putting in a hub with 130mm spacing [aka modern shimano 8/9speed hubs] won't be too much of a hassle. |
| www.duathlon.com /forums/talk/854 (605 words) |
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