Gordon in WA from Vancouver,WA on 1/13/2023 12:22:06 PM:
Hi! Will be doing the Erie Canal this June. Previously, road the GAP (Twice) and C&O. We use our hybrids with 700c wheels. For the GAP, I upsized the tires to 36mm, but that was mainly for the C&O (which in parts was a mess).
Honestly, it's mainly the Tire - not the width. Schwalbe Marthons are awesome - and 32mm widths should be more than adequate, even with full panniers.