Originally Posted by
SurferRosa
Your low gear from the 32/24 combo is 35 gear inches. A 42/28 combo from a double would have given 39 inches, not too far off.
My first post here so I hope I am not stepping on anyone's toes. I agree that OP is going to a lot of expense and trouble to get a gear that is only 10% lower than what is pretty commonly done (42/28) by others. But staying with what the OP is wanting to do, if it were me I would add another link of chain. With that much tension on the chain in the larger rear sprockets, I think you may find that the derailleur is hesitant to upshift out of those gears. At least that was my experience running a short chain like that on a NR derailleur. By the time you've moved the derailleur enough to get off of the larger cog you end up two cogs away, not at the adjacent sprocket.
The additional link will mean that the chain will hang slack in the small/small combos but, if I understood you in the first place, the purpose of the triple is to get some "bail-out gears" for steeper hills and you won't need to use the ratios that the small/small combinations provide.