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Yeah shimano is fine in certain cases, is your bullitt electric?
I think it depends so much on the weight of the bike, if it’s used in a hilly area and the power / torque put through the drivetrain. The heavier and more powerful the cargo bike the more robust the IGH needs to be.
a plus of using enviolo and Rohloff is there is no hub flange offset, so spokes are the same length and it builds into a stronger more reliable wheel. The shifting is also not really reliant on cable tension which is good from a maintenance perspective… Also if the cable snaps you can set it manually into an ideal gear.
Some bike weights and capacities-
Bullitt max total weight 180kg
Tern 200kg
UA XL 250kg.- I know from experience that Enviolo will fail and quite quickly if using the bike at its capacity in non flat areas.
If I was in Amey’s shoes I’d prob go for the external drive train. I don’t think he needs to spend that premium on the E rohloff… but he knows better what he does or doesn’t need :-)
I've done 600 miles on a bullit with the 5 speed Shimano and have been happy with it. Never have to think about it really.