September/October of last year my power numbers on my normal 2x20 and 35k course were very similar whether on my road bike or TT bike. Â Over the winter I focused on the road bike, or neglected the TT bike. Â I was without a PM for almost 3 months. Â Now this spring I've found that on my TT bike my 20-60 min power is 15% less than on my road bike. This means my L4 TT workouts are really in L3. Â I'm trying to focus on an upcoming 40km TT, so building on my sustained power is a top priority. Â But, so is re-adapting to my TT position. Â So what do you folks think? Â Should I do my L4 work on my road position and 1-2 days of ~1hr of tempo (as hard as I can manage for the duration) on my TT position once or twice a week until the TT position power comes a little closer to the road position's power? Â Or, do all my sustained efforts on the TT rig, getting more 'specific' quantity and re-adapting to the bike but perhaps missing out on an opportunity to do more 'quality' in terms of producing watts?