Your wattage for 25mph TTs
06-27-11, 01:58 PM
#76
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Weight will matter a little in speed, but remember, if we compare you (I'm going to assume 75kg) to me (54), I'm going to be a scrawny little bastard standing next to you, which means smaller arms, legs, hips, shoulders, chest, etc. All the little things add up, and a much smaller body in weight is probably a much smaller body to the wind.
Look at cancellara ... he weighs 82kg for 1m86.
Small guys have a disadvantage in TT's.
06-27-11, 02:05 PM
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I think I read somewhere that "Armstrong was doing 38mph on the flats" in a TT once. At first I thought, that's a ridiculous exaggeration. With a tailwind perhaps, but c'mon. After reading this thread I can see it's possible. In an interview a long time ago, Hincapie said he'd been working on threshold intervals at 500w. Armstrong is probably around the same.
That blows my freaking mind.
That blows my freaking mind.
06-27-11, 05:12 PM
#78
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6 mile TT course workout today. 21.5 mph average speed. Average watts (per Powertap): 230 watts.
I'll be working on my position : ).
I'll be working on my position : ).
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06-27-11, 08:59 PM
#79
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Here are some non-aero #s from a couple of weeks ago in St. Louis. Flat, very windy out and back, Merckx style with my travel bike including Gatorskin tires, a huge seat bag, a triple, hairy legs... I had it all going on!
Total Elapsed Time 00:23:00
Distance, mi 8.79
Work, kJ 406
Temperature, °F --
Average Power, Watts 254
Average Cadence 95
Average Speed, mph 22.89
Total Elapsed Time 00:23:00
Distance, mi 8.79
Work, kJ 406
Temperature, °F --
Average Power, Watts 254
Average Cadence 95
Average Speed, mph 22.89
Duration 33:27:00
Distance (miles) 12.4
Work (kJ) 584
Average Power (watts) 291
xPower (watts) 293
Max Power (watts) 679
Average Heart Rate (bpm) 157
95% Heartrate (bpm) 160
Average Cadence (rpm) 90
Average Speed (mph) 22.4
06-27-11, 09:52 PM
#80
Peloton Shelter Dog
Nolan Ryan had a 100 mph fastball after age 40. I do think Lance may have made more money. Which considering that fact he was a pro cyclist is the most astonishing testament to his superstardom in an otherwise obscure (in the USA) sport.
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06-28-11, 03:59 AM
#82
Peloton Shelter Dog
I'm 53, and yes I'm slow. On the other hand I'm recovering from a serious condition (DVT to PE's in both lungs) so I'm doing that with one lung tied behind my back. Just to make it fair.
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06-28-11, 04:55 AM
#83
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Pops, was that on a road bike or TT bike? And in all seriousness, good to see you're riding hard again after your hospital stint.
06-28-11, 12:55 PM
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You are probably full of prescribed PED's and are attempting to use the "lung tied behind the back" excuse to avoid UCI regulations regarding air flow devices.
06-28-11, 01:19 PM
#86
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Supposedly... but having a forward saddle presents other issues, like more weight on your arms, needing to force back with your arms, "carriage return" on the saddle, changing pedal stroke so that the quads get used more and the glutes less, etc.
06-28-11, 01:22 PM
#87
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Not really. I would like an answer to the question about body weight on a flat course. Are w/kG so important if you're not climbing? I would guess that if you're putting out 290 watts and averaging 22 mph while other guys are doing 15%+ less and averaging 26 mph it's either an aero issue, a w/Kg issue or both.
06-28-11, 02:36 PM
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w/kg is important for a) climbing and b) acceleration
for steady state effort on level grounds, its close to negligible.
for steady state effort on level grounds, its close to negligible.
06-29-11, 11:40 AM
#89
Peloton Shelter Dog
I lowered the cockpit on the P3 and brought the elbow pads in about half an inch on each side. I do think this made that rig faster, that's how it felt riding yesterday and today. Most importantly, it's comfortable and sustainable. I'd like to see if I can lower it one more notch and maintain power...
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06-29-11, 03:04 PM
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06-29-11, 06:21 PM
#92
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My best data is a long.. 56 mile TT on a fairly flat course with some slight variations and some poor pavement, but MOSTLY flat and mostly smooth. I did thati n 2:35, including a bathroom break (however much the PowerTap decided to count of that... I think 20 seconds), roughly 195 watts. That is wearing a tri suit and sitting up to drink a few times. I put my CdA around .22 - puts me around 250-260 watts on my TT bike to go 25mph.
Speed For These Parameters 9.91 m/s Power 195 watts Frontal Area 0.44 m2 Coefficient Wind Drag 0.5 Dimensionless Air Density 1.226 kg/m3 Weight Rider & Bike 82 kg Coefficient of Rolling 0.004 Dimensionless Slope of Hill 0.004 decimal
Speed For These Parameters 9.91 m/s Power 195 watts Frontal Area 0.44 m2 Coefficient Wind Drag 0.5 Dimensionless Air Density 1.226 kg/m3 Weight Rider & Bike 82 kg Coefficient of Rolling 0.004 Dimensionless Slope of Hill 0.004 decimal
06-29-11, 08:38 PM
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I lowered the cockpit on the P3 and brought the elbow pads in about half an inch on each side. I do think this made that rig faster, that's how it felt riding yesterday and today. Most importantly, it's comfortable and sustainable. I'd like to see if I can lower it one more notch and maintain power...
06-29-11, 08:42 PM
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My best data is a long.. 56 mile TT on a fairly flat course with some slight variations and some poor pavement, but MOSTLY flat and mostly smooth. I did thati n 2:35, including a bathroom break (however much the PowerTap decided to count of that... I think 20 seconds), roughly 195 watts. That is wearing a tri suit and sitting up to drink a few times. I put my CdA around .22 - puts me around 250-260 watts on my TT bike to go 25mph.
Speed For These Parameters 9.91 m/s Power 195 watts Frontal Area 0.44 m2 Coefficient Wind Drag 0.5 Dimensionless Air Density 1.226 kg/m3 Weight Rider & Bike 82 kg Coefficient of Rolling 0.004 Dimensionless Slope of Hill 0.004 decimal
Speed For These Parameters 9.91 m/s Power 195 watts Frontal Area 0.44 m2 Coefficient Wind Drag 0.5 Dimensionless Air Density 1.226 kg/m3 Weight Rider & Bike 82 kg Coefficient of Rolling 0.004 Dimensionless Slope of Hill 0.004 decimal
How did you come up with .22? VE?
06-30-11, 03:28 AM
#95
fair weather cyclist
it's an estimate using analytic cycling. but you're right, it could be wildly inaccurate. it could be .24 but really not possible to make that determination without factoring in everything. also better to get data from a higher speed TT since at lower speeds there's more room for fudging. i've never done a flat TT though.
Last edited by pjcampbell; 06-30-11 at 03:44 AM.
06-30-11, 07:41 PM
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Nate used to be 6'7 and 235 BTW. Let's just say WADA is looking at banning anti-gigantism drugs used off label.
06-30-11, 07:50 PM
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today at my weekly tt i did awfully (or thought i did) and got caught by two people, but i still broke 25 mph. is this normal 
haha.
haha.
07-03-11, 06:34 PM
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I require more than 250 watts to do a 1 hr TT. On my weekly 7-mile time trial, I average something like 24 mph, and I produce around 275-300 watts (I think). It's mostly because I am a un-aero tall beanpole without TT bike.
07-03-11, 07:56 PM
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It's a sickness. I've gotten up in the middle of the night to stare at a cable. For Christmas I asked for an hour of tunnel time. And I once went to a plastic surgeon to see if I could have some bone removed so I could get my elbows closer together.
Nate used to be 6'7 and 235 BTW. Let's just say WADA is looking at banning anti-gigantism drugs used off label.
Nate used to be 6'7 and 235 BTW. Let's just say WADA is looking at banning anti-gigantism drugs used off label.