Your AP seems absolutely plausible. Low air-density day helps.

Let's plug you in with some assumptions:
https://www.gribble.org/...g/power_v_speed.html

Rider Weight: 80kg
Bike Weight: 9kg
CdA: 0.28 (Conservative)
Drivetrain loss 2%
Crr: 0.005
Air Density: 1.15881 kg/m3

Applying 206 Average Power = 22.2mph which is very close to your 22.3 average.

The biggest source of unknowns is your Crr, CdA, and how the wind conditions held throughout your time on the course. Maybe you ran faster tires and have a slightly higher CdA, or you're more slippery but had slower tires and rougher roads.

But if you squint it's pretty close.

Note if we kept everything constant but bumped Air Density up to say 1.23 Rho, you'd be rolling half a mph slower at 21.8mph.

For Air Density, I looked up Muncie, IN for Sept 27th:
https://www.wunderground.com/.../KFWA/date/2020-9-27

Average Temp: 68F
Air Pressure: 29 inHg
Dewpoint: 61F
= rho: 1.15881 kg/m3 or 0.0723426

It seems right for that speed and your size

What PM are you using?

---

-Of course it's 'effing hard, it's IRONMAN!
Team ZOOT
ZOOT, QR, Garmin, HED Wheels, Zealios, FormSwim, Precision Hydration, Rudy Project

Barometer was 29.82 on Sunday in Fort Wayne. Don’t know where weather underground was getting 28.97. Can you do the calculations based on this?

From ADDS:

KFWA 271540Z 23013KT 10SM BKN020 BKN190 22/17 A2982 RMK AO2 T02220167
KFWA 271454Z 22013KT 10SM FEW010 SCT190 20/16 A2982 RMK AO2 SLP094 T02000161 50003

Doh! My bad - will ETA.

Powertap P1 left-side only.

---

Aaron Bales
Lansing Triathlon Team

I can't speak to the Powertap pedal system but I know my Garmin Vector 3's are consistent but yield data that's a good 10-15 watts lower then people who ride similar splits to me. It really doesn't matter, as long as your pedals are consistent, just use your numbers. If you want to compare with others, it might be more frustrating.

---

-Of course it's 'effing hard, it's IRONMAN!
Team ZOOT
ZOOT, QR, Garmin, HED Wheels, Zealios, FormSwim, Precision Hydration, Rudy Project

Exactly - as long as it is proportional and repeatable it seems fine. Just wondering mostly if leaving the right shoe clipped in might have thrown the calibration off. Sounds like those numbers are believable, so I guess I’ll believe ‘em!

---

Aaron Bales
Lansing Triathlon Team

This is a table where people posted their power at 36 km/h, which was about your speed. The numbers are between 166 and 238 W, so your number of 206 seems to be almost exactly the median:



Größe_kg_Watt_W/kg_Name@kmh__Temp_Outfit__Streckenlänge
1,86__77_166__2,12_sabine-g@36,0_28C__65mm/90mm,Castelli Allout, Aero Straßenhelm__16,4km
1,86__77_179__2,30_sabine-g@36,2_18C__65mm/Citec Scheibe,Bioracer Einteiler, MET Drone __55km
1,86__77_206__2,57_sabine-g@36,9__18C__80mm/Citec Scheibe,CastelliSanremoTr Aero Straßenhelm__101km
1,86__77_198__2,57_sabine-g@36__28C__80mm,Bioracer Einteiler, Aero Straßenhelm__70km
1,86__77_193__2,50_sabine-g@36,4_28C__80mm/Citec Scheibe,Bioracer Einteiler, Kask Bambino Helm__70km
1,86__77_181__2,30_sabine-g@36,0_15C__65mm/Citec Scheibe,Bioracer Einteiler, MET codatronca__96km
1,86__77_177__2,30_sabine-g@36,1_20C__65mm/Citec Scheibe,Bioracer Einteiler, MET codatronca__58km
1,88__76_192__2,52_-MJ-@36,3____22C__60mm,CastelliSanremoTr, Aero Straßenhelm
1,86__85_235__2,76_MarcoZH@36,4_23C_80/Disc,CastelliSpeedZweiteiler,Specialized Evade
1,86__84_225__2,68_MarcoZH@36,6_22C_80/Disc,CastelliSpeedZweiteiler,Specialized Evade
1,74__65_187__2,87_felixb@36_____20C__88mm+Scheibe , Bioracer TT, MET Drone, steh. Start
1,78_84_176_2,10_MR. Brot@36,0_22_60/88Leeze/Wheelcover, Velotec PRO Aero Speedsuit, MET Drone_47km Pendelstrecke
1,78___84___180___2,14___Mr. Brot@36,1___20C___Velotec Pro Aero, MET Drone, Wheelcover___47km Pendelstrecke
1,81__77_217__2,81_pXpress@36,3__22C__Hed3+Scheibe , CastelliAllOutspeed, Casco Helm
1,90__88_237__2,69_steppison@36,1_23C__60mm+Scheib e, Zweiteiler bisschen locker, Carnac Notus Evo__90km
1,87__85_222__2,61_microsash@36,1_23C__60mm Citec+Scheibe Citec, Zoot Trisuit, Carnac __40km
1,87__85_217__2,55_microsash@36,0_23C__60mm Citec+Scheibe Citec, Carnac Speedsuit, Carnac __40km
1,87__85_209__2,45_microsash@36,0_23C__60mm Citec+Scheibe Citec, Carnac Speedsuit, Carnac +Überschuhe__40km
1,76__71_214__3,01_KetteRechts@36,0_24C__Zipp 606, konventioneller Einteiler, Rudy Wingspan
1,86__82_181_2,26_Andreundseinkombi@36,5_13,9C_ Citec 80mm+RON Scheibe, Castelli Einteiler, Evade Tri Helm, 180km
1,76__72_185__2,57_bergflohtri@36,0_28c__Hed Jet 4 + He'd Jet 9, konventioneller Einteiler + altes Radtrikot, Evade Helm, 2km Wendepunktstrecke
1,75__74_212__2,86_redeagle@36,0_24C__60mm/CitecDisc,Einteiler,CASCO SPEEDairo RS__98km
1,83__75_215__2,86_swimbikerunlifestyle@37,5_24C__ Trainingslaufräder, flatterndes Trikot, ekoi Aerod. Helm__
1,83__74_195__2,64_swimbikerunlifestyle@36,2_30C__ Trainingslaufräder, flatterndes Trikot, ekoi Aerod. Helm__ (gerundete Werte)
1,93__77_193__2,51_Paul.l@ 36_18C_60mm vorn/hinten, Castelli AllOut, Giro Aerohead___ 60km, 3 Wendepunkte
1,75_66_235_3,46_Solution@36,2_10_60/80 LRS normale Rennradkleidung_Rundstrecke 62km
1,81__80__197__2,46_Kido@37,5_17,2C_88mm/Xentis TT Clincher, Castelli AllOut, UVEX Race 8____134km
1,87__87__232__2,66_ritzelfitzel@37,3_24C_Veltec60 mm/Citec8000, Giro Aerohead, Flattertrikot____8.6km Wendepunktstrecke
1,86__81__228__2,8__kleinomat@36,4__26C_CCR 50mm v/h, Giro Attack2012_Bioracer Tri-Einteiler o Ärmel_DalkemanGütersloh 38,5km
1,86__81__210__2,59__kleinomat@36,3__26C_CCR 50mm v/h, Giro Attack2012_Bioracer Tri-Einteiler o Ärmel_TriathlonKamen 39,8km
1,80__76__205__2,70__klatu@35,7__23C__Citec 8000 63/80, Casco Speedairo RS, Einteiler+Radtrikot 35,7 km
1,83__74__228__3,08__amarkov@37,1__28C__50mm vorn/hinten, Einteiler + Carnac Aero Road_26,7 km
1,87_86_238_2,76_ThomasW.@36,5__19C_vorn + hinten Zipp tubular 1080 _22mm GP 4000II_ Bioracer Trimaster_Giro Aerohead_22,6km_43HM_Regen_94% Luftfeuchte
1,87_86_205_2,38_ThomasW.@36.0_27C_Zipp 1080 tubular _Vittoria Corsa_Bioracer Trimastet_Giro Aerohead _84,7km
1,87_86_214_2,49_ThomasW.@37,3_15C_Roval321Disc_Ci tec63Ultra_25mm Conti5000_Castelli San Remo 4_Erkner MD 97km
1.75_74_248_3.35_TobiF.@36.3_17°C_ Mavic Cosmic Carbone_ GiroAerohead_Radtrikot Triathlon Ingolstadt_GP4000 23mm
1,86__77_204__2,65_AndrejSchmitt@36,1__17C__80mm/60mm,CastelliSanremo4.1_ Road Helm Oakley ARO5__101km
1,85__78_235__3.01_KarpatenWilli@36,1_20C_DT Swiss 1800 P Spline Conti 23mm S II_Vereinsklamotten_41,7 km
1,85__78_201__2.57_KarpatenWilli@36,2_24C_DT Swiss 1800 P Spline Conti 23mm S II_Vereinsklamotten_9,1 km
1,78_71_189_2,66_Acula@35,3_21,9C_68mm/86mm mit Conti 5000 23mm/25mm + normaler Straßenhelm + Champion System Apex Aero Tri Suit_40,86 km (OD Rundkurs mit 3 Runden & 2 Wendepunkten)
1,79__70_170__2,43_Nole#01@36,0_25C__47mm/Citec Scheibe,Skinfit Zweiteiler, Giro Aerohead
1,92__87_195__2,24_Tridinski@36,0_21C__88/88,Bioracer,GiroAdvantage,2x7km Pendelstrecke16HM
1,92__87_175__2,01_Tridinski@36,0_34C__88/Disc,Bioracer,MetDrone,2x7km Pendelstrecke16HM

Well done on the race.
I have to say I am a bit surprised at those numbers, just given what I have done in the past and I am a few inches shorter than you. The elevation and the 180 degree turns would make me think that your power numbers seem a little low for the split that you rode? On a pancake flat course I have done 2:22 at about 240 AP....no where near as slippery as you are from the sounds of it.
As for target IF....I have been coached to aim for 85% but push to 88% on the day if things are feeling good, so your IF was right on what I have been taught to do and with what I read online that others also recommend as well.

You say "decent position and good equipment" which, based on math by other posters, would make 22.3 mph totally feasible on just over 200 W.

Is your friend a triathlete or a road cyclist? If the latter, might be their standards are slipping in and they're not accounting for your much lower CdA on a tri bike.

It also depends on the individual PM, right? No idea if P1 pedals are known for being low or high, but I think it "felt" right. Like, I did an Olympic and a few sprints earlier in the year - my data said I was pushing more watts and going faster. I also felt like I was working harder on those short course rides, so this was probably a good effort.

I went from an aluminum Felt S22 and old Giro helmet to a Cervelo P5d and LG P-09 helmet (long story). 28mm GP5k tires, latex tubes, sleeved kit, goofy aero calf-guards. Decent positional discipline. I should be somewhat slippery.

My friend is also a bit shorter - his split at the race was very similar to mine, and he said he was around...240 watts maybe? Don't remember exactly, but it was noticeably higher.

Thanks to everyone for the input!

---

Aaron Bales
Lansing Triathlon Team

I raced the OLY at Muncie this past weekend and averaged 23.2 mph with AP per left side only Assioma of 255 watts. I’m 5’10” and 150 lbs with good equipment and (I thought) decent position. If both of our AP are accurate I guess I have some room for improvement on position!

It is definitely possible our meters read differently. In July I did 23.6 for a sprint on a very flat/ fast course on 225 AP.

Effort levels and numbers seem to match up with my Kickr too.

Whatever the case, nice work on Saturday!

---

Aaron Bales
Lansing Triathlon Team