Some of the climbs in FulGaz are very steep and it would be handy to have lower gearing.
A guide is published below. changing the wheel size changes all the gear ratios, not just the largest cog. If your combination isn't listed below, try the wheel size for something similar. It doesn't have to be a precise conversion, it will still work.
|Actual rear cog = 25||Wheel size|
|Simulate 26 cog||2016|
|Simulate 28 cog||1872|
|Simulate 30 cog||1747|
|Simulate 32 cog||1637|
|Simulate 34 cog||1541|
|Actual rear cog = 28||Wheel size|
|Simulate 30 cog||1956|
|Simulate 32 cog||1834|
|Simulate 34 cog||1726|
This only works for “wheel off” trainers like the KICKR, Neo, etc. Not trainers where you leave the back wheel on the bike.