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26-10.-2005, 04:46 AM
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#46 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,689
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Re: Sprint power on trainer vs. road
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That's true. Those guys are primarily endurance riders rather than true sprinters. I'd like to see the trackies ride 120 miles and still be fast at the end.  |
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26-10.-2005, 09:16 AM
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#47 | |
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Registered User
Join Date: May 2004
Posts: 229
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Re: Sprint power on trainer vs. road
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Precisely my point, It doesn’t matter how many watts you can produce, if your already taxed when you need it, your a dead pigeon. I just did some playing around sprints today, Wind Conditions were 3mph tailwind or calm, flat road. Here is some interesting numbers to look at, plus the files below. I generated 1200 watts in either a 39x17 or 39x16 & already starting from 100rpm, max rpm got to 160-170 I would like to see a power meter file posted showing track sprinters at 220rpm, almost seems impossible, especially seated. I’m not the fastest, or the smartest, but put in the gearing the run and 220rpms and see what the max speed would be. Let me know if anyone found this website to figure it out. Take a look at my starting speed & rpm, to verify I was in the small ring 1st sprint) started at 100rpm in 39x16=19.3mph, got 30.6mph max, 159rpm and 1172watts 2nd sprint) started at 100rpm in 39x17=18.5mph, got 30.8mph max, 170rpm and 1261watts All the watts are from the initial torque up to speed, once there you just have to maintain the rpm as you can see the speed and rpm stayed up but power was declining, no more resistance on the pedals. So trackies max watts should also come from the initial burst down the embankment. |
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26-10.-2005, 01:45 PM
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#48 | |
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Registered User
Join Date: Apr 2005
Location: Kansas City, USA
Posts: 3,689
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Re: Sprint power on trainer vs. road
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http://analyticcycling.com/GearSpeedCadence_Page.html Poke around in there some if you get the chance. Lots of excellent tools to play with. |
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26-10.-2005, 09:15 PM
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#49 | |
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Registered User
Join Date: Sep 2005
Posts: 797
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Re: Sprint power on trainer vs. road
That seems pretty fast. nice!! How heavy are you. I have done similar numbers, but dont have a 39. 42x17 @32 mph. Im shocked the watts are so high I just wish I could feel that same snap in a 90"gear, then I could go 42 not 32... Rick and veloflash pointed out that the numbers are on accelerating too. I think that your mixing up the trackies and the roadie viewpoints here. The track guys dont think about the miles put in prior to the sprint. H ave you seen www.analytical cycling.com Have fun Thanks BP
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Last edited by Billsworld : 26-10.-2005 at 09:41 PM. |
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26-10.-2005, 09:18 PM
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#50 | |
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Registered User
Join Date: Sep 2005
Posts: 797
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Re: Sprint power on trainer vs. road
Thats the guy.....
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26-10.-2005, 10:28 PM
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#51 | |
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Registered User
Join Date: Sep 2005
Posts: 797
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Re: Sprint power on trainer vs. road
I know we are off subject here, but there is a real nice track in Manchester. Your best guys seem to train there..I really hate to fly, but that would be a good reason to get my ars on a plane. My wife use to be a British Air flt attendant. She thinks I am a big baby. Thanks BP
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26-10.-2005, 10:35 PM
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#52 | |
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Community Team
Join Date: Nov 2002
Location: Newport, South Wales
Posts: 3,831
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Re: Sprint power on trainer vs. road
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It's a great track. i think i was there for the opening and saw some of the early races there. seems like a lifetime ago! we also have a track in Newport (in Wales, probably 300 miles from Manchester) which is the same spec (but different seating etc). Flying's ok, but obviously on a long haul flight (and maybe even short haul) you need to take precautions as regards DVT. Now, we're really off-topic! ric
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27-10.-2005, 12:43 AM
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#53 | |
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Registered User
Join Date: May 2004
Posts: 229
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Re: Sprint power on trainer vs. road
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I’m 5’6” and weigh 157-160lbs  I wish I could too in a 90+ inch gear, but I realized you cant snap up a 53x14,13, you have to apply a lot of force/power and wind those gears up smoothly. I have practiced also developing those 2 ways to sprint within my club rides, so I can use it in races. When the speeds are 27+mph its going to be a power wind up, when the speeds are below 25mph, there dead pigeons, the high rpm snap gets them all the time. During club rides I can usually determine which one to do but its harder in a race because all the distraction & your adrenalin is flowing, staying relaxed is key & being able to observe what’s going on with 1/2 lap to go is hard.  If you put in the gearing the track guys run roughly 50x15 and 220rpms, it comes out to a speed of 57.8mph, I think that’s highly unlikely especially seated, they would rip their legs out of the socket doing those rpms in the saddle. Put you bike in a trainer, take the chain off and have at it, see how high you can spin with no resistance, in the saddle and out. Hey this might be a new for of spin intervals! |
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27-10.-2005, 08:25 AM
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#54 | |
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Registered User
Join Date: Sep 2005
Posts: 797
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Re: Sprint power on trainer vs. road
I have taken the resistance off the trainer and done some free spinning. I have read the track guys do it to teach the legs to fire quick. They usually do it after a gym sesion.(squats etc..). I am not an expert, but I think the popular gear for the elite sprinters is 50x14. I hear its around a 160-170 rpm max.. Thanks BP
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