Good one :-)
Might I suggest that, what with these being PB attempts, using your lightest bike and definitely *not* carrying luggage might be .... a better idea ?!
That's the only bike that currently has a power meter.
I didn't actually
need to see my power but I find it interesting to keep an eye on it. What I did was to try and stay above 210 W and keep my heart rate at around 150 bpm.
If the HR got to 152+ bpm I backed off slightly to bring it back down because I had burned out on a previous attempt when I did repeated surges at 155+ bpm.
I did make a bigger effort on the mid-climb ramp, hitting high 150s for that. I also stood up and 'sprinted' for the last 3/4 km, maxing out at 161 bpm.
I do
carry the kitchen sink on the heavier bike. I don't generally bother adding to or removing things from its pannier so it contains surplus kit e.g. 3 spare tubes
plus a puncture kit, a multi-tool etc. for those epic 1,000 km wilderness rides that I never quite do!
There was 0.5 kg of water that was not needed for a short ride like that (just shy of 35 km).
I think I could have saved 3-4 kg by riding my CAAD5 without water and carrying just minimal kit.
Next time I will ride lighter and just go by HR. (The trouble with HR though is the lag. I have my Elemnt Bolt set to display the 3 second average power so I never need to spend more than a few seconds at the wrong level of effort).