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Three tools for removing rear sprocket clusters. |
Some time ago, I did a
short piece on replacing a broken spoke.
It was, quite rightly, pointed out that, unlike the hub-gear set-up I illustrated, many bikes have a derailleur set-up, and require an additional step.
If you break a spoke on the "drive" side (that's the side with the gears) of a bike with a derailleur set-up, you usually have to remove the set of gears from the wheel in order to have room to get the new spoke in.
Plenty of advice is available elsewhere on the web for this, so I will just cover one topic which may be of interest to the rider about to undertake this for the first time.
Derailleur bikes, except Campagnola models, and some vintage models, tend to have one of two types of rear gearing.
There is the "freewheel" design, still fitted to lower-priced new bikes, including 6-speed Shimano SIS set-ups.
Then there is the "freehub" design, which is fitted to bikes with eight-speeds and above. There are a few older 8-speed "freewheel" hubs about, but the design flaws with that was a major reason why the "freehub" design has become dominant for more than 6 speeds.
If you have seven speeds, you could have either design!