Joined: Aug 2010
Posts: 12,760
Likes: 2,117
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
If you need a wider saddle, you will know it. In other words, don't listen to us, listen to your rear.
I use a B17 on my indoor trainer where I sit completely upright or leaning slightly forward. I occasionally have used a Flyer (essentially a sprung B17) on my expedition bike but that is when I put on the suspension fork and pretend it is a mountain bike, in which case I am sitting more upright on the bike.
On my drop bar bikes I use a narrower saddle than a B17. On one drop bar bike I use the Pro and on four other drop bar bikes I use a Conquest which essentially is a sprung Pro.