(just stating a few obvious things, in case they have been missed, feel free to ignore if you've done them)
Is the wheel straight in the track ends? This might cause a slight change leading to the binding. Similarly, is the cog on straight? If its slightly mis-threaded that change of angle could cause an issue
(just stating a few obvious things, in case they have been missed, feel free to ignore if you've done them)
Is the wheel straight in the track ends? This might cause a slight change leading to the binding. Similarly, is the cog on straight? If its slightly mis-threaded that change of angle could cause an issue