20w difference between Conti gators and the gp5000.
For a slower rider 20w just cruising is mammoth.
Good fitting clothes, oh yeah.
And some yoga/stretching to allow a lower cockpit and better position. Some riders are tossing 30w in the trash riding their $5000 bike like it’s a granny dutch.
So some gp5000 tires, a trim kit, and yoga could get a slow rider probably 1-2mph in the flat on avg. If you cruise at 150w and avoid losing 50w......