Tri frames make for a heavy bike.

I ride a Cervelo P5-6...comes in around 8.2kg with Zipp 404 wheels and ultegra mechanical. It's not mountain goat...but with my position, which yields a 20 degree back angle, once I get some power through the Rotor QXL standard crank on a 11/25 cassette....that thing really flies. The extra weight actually helps me keep momentum under most conditions. Obviously pay a heavy price on the climbs (both the weight and the different hand hold on the bull horn affect this.

On the same Strava segments, under different conditions obviously, my heart rate will be 10-20BPM lower and my speed about 5% faster than my times on the same segments riding my Scott Foil Team Issue in the drops.

One of the most important aspects of tri bike fit is the hip angle and how your bike fit changes your run speed. Most guys will be faster with a less efficient but more comfortable bike position because they will be able to run faster than if they are slammed low and tighten their hip flexors and then try to run.

All that said...it is a weird looking bike...but it helped him to an amazing achievement that none of us can take from him! Go Ironman Ramsay! You are an Ironman!