Not strictly a modern groupset but have updated my 1991 Trek with a 1x9 7700 groupset for commuting duties. All the other components apart from the headset are also updated. Really hard to capture the splatter paint as it's literally fluorescent (saves me wearing hi-viz!) Some nice design touches on the frame..
I initially considered a narrow-wide chainring / Paul chain keeper but to be honest its never been an issue. The only time it dropped was when I shifted across the whole cassette using the friction shiftier in one go. But otherwise no issues. I think cross /off road is a different matter..
Not strictly a modern groupset but have updated my 1991 Trek with a 1x9 7700 groupset for commuting duties. All the other components apart from the headset are also updated. Really hard to capture the splatter paint as it's literally fluorescent (saves me wearing hi-viz!) Some nice design touches on the frame..