Stein-Mini-Lock vs NBT2

Mathias Koerber said:

Does anyone have comments on the relative merits of the
J.A Stein Hypercracker Mini Lock Tool (as shown on sheldonbrown.comstein mini lockOpen ↗)
vs the NBT2 from M-Gineering (m-gineering.nlindexg.htmOpen ↗)

I am most curious why the Stein Tool requires a removable part which could get lost. Does that
removable part make it fit in situations where the NBT2 would not?

I haven't yet seen/used the NBT2, but I'm currently negotiating with Marten about becoming a dealer
for his ingenious product.

It appears that each has its good points.

The NBT2 is smaller, and doesn't have any loose parts to misplace. I could easily imagine the small
parts getting Might be lighter too, though the Stein tool is also very light.

It appears that the Stein tool would be a little easier to use for lockring removal. When you
install the actual spline part of the Stein tool, the cassette can still turn, so you can rotate
the cranks and get the chain onto one of the larger rear sprockets before assembling the outer part
of the tool.

With the NBT2 tool, if you want the chain on one of the larger sprockets for improved leverage, you
must install the wheel with the chain already meshed with that sprocket, which is likely to be
somewhat difficult.

The NBT2 tool bears against the derailer hanger tab for lockring removal. Some frames have rather
fragile hangers, which could possibly be damaged, especially if the tool is used improperly. This is
less likely with the Stein tool.

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