As part of prepping for an upcoming tour I'm refurbishing my '89 Voyageur.

The stock cranket (55/44/27) is geared too tall for my needs so I would like to switch it out, Nashbar makes a 44/33/22 crankset that sounds about right, only problem is they sell three bottom brackets to match.

https://www.nashbar.com/bikes/Product...0052_175234_-1

68x108

68x113

68x118

Does anyone know which would fit my bike?

Thanks,
Mike

Can't tell you which is the right one but if it's this crankset https://www.nashbar.com/bikes/Product...0052_502057_-1 they show ISIS 113mm recommended for 47.5mm chainline.
I would measure your chainline and get the BB that fits the best. To measure chainline follow this link
https://sheldonbrown.com/chainline.html

Thank you Sir!

Turns out the chainline on the Voyageur is 47.5mm or close to it.

I was able to get help from an experienced bike guy pulling the crank to meaure the present bottom bracket; its a square tapered 68x123 unit.

The next question I have is, the Nashbar crankset (the very same you linked) is "compatible with 8- and 9- speeds".

With Nashbars' 7/8 speed chain or some such chain will I be able to use this crankset with a seven speed freewheel?

Thanks again,

Mike

I'm thinking you'll have zero problems. I use a modern (FSA 9 speed) triple crankset on my Voyageur, 8 speed chain, stock 7 speed freewheel.