Originally Posted by
Tourist in MSN
I was curious so I did a few google searches. If the link below describes the system you are considering, it looks like maybe the derailleur will be high enough on a 20 inch wheel to avoid having a ground clearance problem. I assumed it would have a huge cage length to take up that much chain slack, but it looks like they did a good job trying to keep it up off the ground.
First Look: SRAM GX - The 11-Speed Wide Range Drivetrain for the People - Pinkbike
Thanks for that. The chain slack would correspond only to the difference between the 11T and 42T cogs, since it would be a single ring in the front. No dramas with slack chain or ground clearence with my present 11-36T setup.
Where I live SRAM prices are way too high compared to Shimano, plus Shimano already offers an 11-42T 11-speed cogset with matching derailleur (which I already purchased, for this bike or another project) for normal prices. That leaves you to source your own single chainring crankset, which is not too difficult.