bidaci
03-04-08, 06:23 PM
I am going to try my hand at Time Trials this year and am curious as to how your pace line speeds compare to your TT speeds.
"The 33"-Road Bike Racing - Pace Line speed vs Time Trail speed
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asgelle
03-04-08, 06:40 PM
I am going to try my hand at Time Trials this year and am curious as to how your pace line speeds compare to your TT speeds.
About 25% less power for a group of 4 rotating equally.
http://www.midweekclub.ca/articles/broker98.pdf
About 25% less power for a group of 4 rotating equally.
http://www.midweekclub.ca/articles/broker98.pdf
wanders
03-04-08, 07:28 PM
+1 on 20-25% faster. More indicative of my sorry TT ability.
asgelle
03-04-08, 07:32 PM
+1 on 20-25% faster. More indicative of my sorry TT ability.
25% less power, not faster.
25% less power, not faster.
branman1986
03-04-08, 07:39 PM
only minorly correlated
Snuffleupagus
03-04-08, 07:52 PM
You can't reasonably compare the two without more information.
If I'm sucking wheel at the back of a 75 man road race, 30mph on a flat feels like a recovery ride. If I'm rotating with one or two other guys at 30mph, I'm not going to last more than a few miles before I make a shrill noise that apparently sounds something like "ka-powie!" and limp home with my tail between my legs.
If I'm sucking wheel at the back of a 75 man road race, 30mph on a flat feels like a recovery ride. If I'm rotating with one or two other guys at 30mph, I'm not going to last more than a few miles before I make a shrill noise that apparently sounds something like "ka-powie!" and limp home with my tail between my legs.
waterrockets
03-04-08, 08:12 PM
25% less power, not faster.
+1 this is an important factor
Figure 25% power savings results in about a 2.9% speed increase, if my cube-root math is correct. So, if you TT at 27mph, and paceline with the same bike, work smoothly, and have equal abilities, you can expect 27.8 mph or so for two people.
+1 this is an important factor
Figure 25% power savings results in about a 2.9% speed increase, if my cube-root math is correct. So, if you TT at 27mph, and paceline with the same bike, work smoothly, and have equal abilities, you can expect 27.8 mph or so for two people.
brianappleby
03-04-08, 10:15 PM
I'd also argue that the up&down of pacelining would allow you to push past LT while leading, and recover in the draft, allowing faster speeds overall no?
I understand the physics, but I think physiology comes into play too.
I understand the physics, but I think physiology comes into play too.
kudude
03-04-08, 10:31 PM
How good are you at your pack skills? If you leave huge gaps (watch me ride sometime :D), then 26 in a group feels like 22 solo, but if you're in a good spot -- softpedalling seems to happen a lot.
truckin
03-05-08, 06:19 AM
You can't reasonably compare the two without more information.
If I'm sucking wheel at the back of a 75 man road race, 30mph on a flat feels like a recovery ride. If I'm rotating with one or two other guys at 30mph, I'm not going to last more than a few miles before I make a shrill noise that apparently sounds something like "ka-powie!" and limp home with my tail between my legs.
KAPOWIE!! You just sold a car!
Bit of an inside joke for those of us living near a Johnson Automotive dealership...
:)
If I'm sucking wheel at the back of a 75 man road race, 30mph on a flat feels like a recovery ride. If I'm rotating with one or two other guys at 30mph, I'm not going to last more than a few miles before I make a shrill noise that apparently sounds something like "ka-powie!" and limp home with my tail between my legs.
KAPOWIE!! You just sold a car!
Bit of an inside joke for those of us living near a Johnson Automotive dealership...
:)
Snuffleupagus
03-05-08, 07:35 AM
http://i32.tinypic.com/juetdw.jpg
GatorFL
03-05-08, 07:41 AM
http://i32.tinypic.com/juetdw.jpg
I don't get it.
I don't get it.
truckin
03-05-08, 07:43 AM
I don't get it.
This'll help:
http://www.youtube.com/results?search_query=johnson+automotive&search_type=
This'll help:
http://www.youtube.com/results?search_query=johnson+automotive&search_type=
merlinextraligh
03-05-08, 07:51 AM
Net Net is you can't pace or predict your TT speed off of group ride averages.
Do some 2x20 intervals and you'll start to get an idea of what your TT pace should be.
Also, using a power meter, or a HRM helps.
Do some 2x20 intervals and you'll start to get an idea of what your TT pace should be.
Also, using a power meter, or a HRM helps.