Join Date: Jun 2006
Bikes: 03 Raleigh Professional (steel)
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There is no 53D. The letter designation notates that the shifting aids on the ring are set up in a certain way. You might get away with using a B alongside a D, but then you might not.
But why are you trying to do this? Do you want a taller gear? The solution is to change the cassette. (And if 52-11 isn't tall enough for you, learn to pedal faster.)
Stupidity got us into this mess - why can't it get us out?
- Will Rogers