Seven speed fixie.

Ambrose Nankivell said:

I seem to have a bit of a problem with my 7 speed Nexus hub gear (no roller or coaster), in that
it suddenly started taking a lot more pressure to freewheel (i.e. I stopped pedalling and had to
push quite hard on the pedals to stop them moving, causing the chain to jump) when riding over
some cobbles. Since then (a few days ago), it seems to have varied a fair bit in stiffness (as
measured by how hard it is to get the pedal in the right place when starting), but has not moved
smoothly since, although pedalling is unaffected.

The actual rotation speed of the pedals changes when I change gear, so it's not catching on the
outside of the hub.

Is there anyone who has any idea what might be happening and how to fix it? Does anyone know of
any LBSs who might have the expertise? I assume most of them don't see many hub gears. (It was
supplied by the insurance company, so I can't easily go back to them)

Chain tension can effect freewheeling friction with these hubs - but I wouldn't have thought the
wheel would have moved backwards in the dropouts by itself.

I've x-posted this to rec.bicycles.tech to hopefully get some answers.

~PB

In "]news:[email hidden],
Pete Biggs <[email hidden]> typed:

Quoted message said:

Ambrose Nankivell said:

I seem to have a bit of a problem with my 7 speed Nexus hub gear (no roller or coaster), in that
it suddenly started taking a lot more pressure to freewheel (i.e. I stopped pedalling and had to
push quite hard on the pedals to stop them moving, causing the chain to jump) when riding over
some cobbles. Since then (a few days ago), it seems to have varied a fair bit in stiffness (as
measured by how hard it is to get the pedal in the right place when starting), but has not moved
smoothly since, although pedalling is unaffected.

The actual rotation speed of the pedals changes when I change gear, so it's not catching on the
outside of the hub.

Is there anyone who has any idea what might be happening and how to fix it? Does anyone know of
any LBSs who might have the expertise? I assume most of them don't see many hub gears. (It was
supplied by the insurance company, so I can't easily go back to them)

Chain tension can effect freewheeling friction with these hubs - but I wouldn't have thought the
wheel would have moved backwards in the dropouts by itself.

It's moved forward in the dropouts if anything. I just had the wheel off for the first time, so it's
quite possible the nuts aren't quite tight enough.

Quoted message said:

I've x-posted this to rec.bicycles.tech to hopefully get some answers.

Thanks Pete. I didn't think of that rec.bicycles.tech thanks also. Hope someone has experience
with these.