sn,
Almost certainly for standard Ergon GP1 grips. With the grip level with the end of the bar and the brake right in nearest to the bend there is nearly 50mm spare.
If you have upgraded your Sherpa to a Rohloff
then you may have more problems on the right side.
But even the
Ergon GC3 grips with bar ends built in should work, get full size ones and cut the right one down to fit.
Comfort bars and Ergon grips are the most comfy to ride with I have found to date.
Julian.