Ootini
Senior Member
- Location
- North Wales
Hi all,
This is (at the moment) a purely theoretical question, is it possible to add a 40t or 42t expander sprocket to a standard Tiagra 12-25 cassette? My CX bike is running a 50/34 compact double chainset with the Tiagra cassette. Which is fine for pottering around, but when the bike is loaded up with touring kit hills can become an issue. I'd rather not have to faff fitting a triple crankset so figured the expander sprocket might be an easier way to do it.
Would I need to change the rear cage / mech?
This is (at the moment) a purely theoretical question, is it possible to add a 40t or 42t expander sprocket to a standard Tiagra 12-25 cassette? My CX bike is running a 50/34 compact double chainset with the Tiagra cassette. Which is fine for pottering around, but when the bike is loaded up with touring kit hills can become an issue. I'd rather not have to faff fitting a triple crankset so figured the expander sprocket might be an easier way to do it.
Would I need to change the rear cage / mech?
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