Since Ironman is next weekend, I needed to do a quick ride in my race configuration and I wanted to nail my race pace watts and speed so I decided to do some SRM power meter test runs with the Elite. I was surprised at the result!! At 200 watts, the disc rear wheel, aero front rim and aero helmet increased my average speed by over 4 km per hour! That's WAY more than I expected. My race pace is 220 watts and with the aero enhancements, that power input creates 40 km / hour worth of speed. Of course, it will average out much less considering climbs and pauses in peddling, but still - that's a nice cruising speed.
What I was also VERY surprised with is at both 150 watts and 200 watts, the 'aero' Elite was faster than the both the M5 and the Home built lowracer.
I think perhaps there may have been some 'sail' effect due to the disc wheel, as it was a bit windy (around 9 kph winds). That could explain the fast times, as 'theoretically', the lowracers should be faster than the road bike. Or perhaps the temperature difference between the two test dates played a roll in the significant difference?
|Vehicle||Photo (click for large)||150 Watts||200 Watts||220 Watts||250 Watts|
|ave speed kph||ave speed kph||ave speed kph||ave speed kph|
|31.6 kph||35.6 kph|
|M5 lowracer||31.3 kph||36.4 kph|
|Elite Tri Bike||28.9 kph||32.9 kph||35.2 kph|
|Elite Tri Bike
rear disc wheel
front aero rim
aero helmet, aero water container
|33.9 kph||37.7 kph||40 kph||41.1 kph|
|Lean steer trike||27.3 kph|
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