First ride on the tandem through proper mud today and the constant chain suck made it almost impossible.
It's got 3x8 42-32-22 x 11-30 with Shimano Revoshift twist shifters and a Shimano Acera rear derailleur.
We're only getting chain suck on the granny ring, no problem at all on the middle ring, which got me thinking about trying 2x8.
Putting the numbers in to http://sheldonbrown.com/gears/ it looks like with an 11-34 on the back, we would only effectively lose the bottom two gears. I reckon we could live with that.
Does that sound like a good solution, or should we be looking at a better quality granny ring, chain and rear derrailleur to cure the problem ?
Long term, I'm waiting for a cheap Rohloff hub to turn up on ebay, meanwhile £10 for a cassette is cheap enough and the derailleur is good for a 34t bottom gear and 43t total range.
(42-32)+(34-11)=33 Have I got that right ?