Something that has had me thinking when doing z5-6 efforts on my road bike (not triathlete anymore) I feel much better doing them standing, not good for when flat terrain is one concern for racing, climbing is fine.. So mainly just higher RPE in legs when seated for efforts 115-120% of Threshold power which yes is accurate. Then when road bike was in shop for repairs I have been using cross bike and when doing 115% efforts the other day I noticed I felt so much better seated. I need to compare measurements btwn bikes but its interesting none the less but just curious on initial thoughts. Cranks are shorter by 2.5mm on cross bike.