53/39 rings wont fit on your current chainset as it is a compact. If your chainset is power torque and you haven't got the right tools to remove it, get a shop to do it. Ultra torque much better design for the home mechanic.
@krankers started
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53/39 rings wont fit on your current chainset as it is a compact. If your chainset is power torque and you haven't got the right tools to remove it, get a shop to do it. Ultra torque much better design for the home mechanic.