Offset Saddle Adapter

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Yes, the adapter can be reversed to move the saddle forward. I have the same back issue and like an upright riding position. I use these back swept Jones H bars to keep from having to lean forward:

Jones H-Bar® SG 2.5 Loop Aluminum

The Jones SG 2.5 Aluminum Loop H-Bar retains the wide range of comfortable hand positions of the original Loop H-Bar, in a higher, 2.5" rise version.

jonesbikes.com