Don’t think that you can lower the gear inches much more without potentially damaging the Rohloff hub.
Roughly 2:1 is the lowest you can go for external gearing on the Rohloff, I believe it used to be higher. Thanks for the info.
We have 55 x 24 on ours. Was the only possibility for the mud port Gates belt drive (the old model). No problems so far (4 years in). Have climbed up to 9% loaded with a kid and camping gear.
@Wouter started
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Roughly 2:1 is the lowest you can go for external gearing on the Rohloff, I believe it used to be higher. Thanks for the info.