Originally Posted by
KeithNorCal
Just curious, since you have it on a Trek 7000, have you tried it off-road? Although my primary interest in dynamo hubs is for commuting, the idea of having a dynamo hub for mtb night rides is kind of interesting. I expect rpm's off-road would be too inconsistent for lighting but I have no experience with dynamo hubs myself.
I ran an older shimano hub on a MTB for a few years. For technical stuff the speed difference is a problem, as generally below about 5kph you get no light, but if you've got a moderately powered helmet light the two work well together. This was my wet weather bike including a half hour swim in a river, the dynamo outlasted the hub bearings. Gotta say when I ditched the dyno hub the bike handled much better too.
On the road bikes I've got a couple of shimano hubs with probably 20,000km on each of them with no problems. The 3n80 is the way to go.