Powertap sl plus recalibration

Is there a possibility to recalibrate ( not manual zero ) a powertap sl+ hub ? Maybe DIY ??

no, you cannot set the slope on these hubs, must be at factory. You can check their static torque readings to identify problems:

I do not think there is any repair or service options for these. Some companies can offer calibration or bearing services but repairs would be difficult. One such company, G3 hubs get full treatment but for older units you need to ask:

Nice to see these old birds still flying around. I used and sold 3 hubs in total, wonder what happened to those.

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After manual zero with the old Cervo head unit, the hub is on track agaim compares against Assioma favero

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