I’m looking for advice from Triathletes regarding my FTP on a tri-bike vs. road bike and how to make changes to training to accommodate a new position.
I have two Ironman 70.3s on the schedule for August/September this year. Ironman 70.3 Chattanooga on August 23rd (B Race) and Ironman 70.3 Augusta on September 27th (A Race). I’ve only been doing structured training on TrainerRoad since August of 2019. To date, I’ve done all of my training on my road bike. My current FTP is 294 and I weigh roughly 172 lbs so I’m right at 3.8 w/kg.
I recently purchased a Triathlon bike that came in last weekend (Canyon Speedmax) and have a bike fit scheduled for this Wednesday. I have not done any workouts on the tri bike yet but plan to do all of my workouts until my races on it after my bike fit later this week. My question is how should I proceed with and potentially amend my plan for the remaining time until my races given that my tri bike will be a different fit and have aero bars? I assume that if you’re training for a triathlon, you should do the ramp test, and all workouts in the aero position you would use in a race? With that being said, should I retest my FTP right after the bike fit? The assumption here being that the power output I’m capable of is lower on the tri bike in my aero position and I therefore need to adjust my FTP so it’s possible to finish my workouts in that position? Should do a week or two of rides in the aero position to get used to it before retesting my FTP?
The alternative being that I continue with my current “road bike ftp” and adjust the % I try to hold on race day to account for aero position power loss. This sounds a bit rough but I’m relatively new and don’t know what’s the best way to proceed so appreciate any thoughts from fellow Triathletes.