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Since we're in TT position mode...rip on mine

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Since we're in TT position mode...rip on mine

Old 05-08-08, 07:38 PM
  #1  
Shayne
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Since we're in TT position mode...rip on mine

I normally do all TT's on a tandem with my daughter. Gives us something to work at together and she's really into winning those medals and such. However, I've done a few solo TT's this spring as the weather was a little to chilly for her. I kind of surprised myself with how fast I went, just using my road bike, normal helmet and no aero bars. Don't even have a skin suit. Clocked a 23.5 mph effort on a technical course that has a pretty good little climb and quite a few corners.

Anyway, I'm getting ready to cat up to a 4 soon, so I thought I'd ghetto rig up the road bike and take a shot at the state TT before I do. I transfered the aero bars off the tandem, flipped the seatpost around and got a team deal on one of those dorky looking helmets. Please help me out a little with my postioning. Sorry about the shots, my wife wasn't into it to much so I just took what I could get. I think I could go lower in the front, but I'd have to change stems. I still want to use the bike at the Tue. night crits, so I don't want to much to be changing back and forth. I'm building up a 68mm front wheel with 24 spokes to be used on this bike and the tandem. Getting a cover for the rear wheel. I can't get a team skin suit in time, so I guess I'll just have to go without that. Thanks for any help you can offer.

I case your wondering, I'm the same size as Waterrockets. At least in height. I punch a pretty big hole in the air.


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Old 05-08-08, 07:57 PM
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You look pretty high. Try a negative rise stem to try to get your back flat and head down.
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Old 05-08-08, 08:05 PM
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I was thinking stem is too short by 1-2cm.
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Old 05-08-08, 08:15 PM
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Originally Posted by SpongeDad View Post
I was thinking stem is too short by 1-2cm.
I can move the aero bars forward or backward without changing the stem. It was that feature that sold me on this particular model.
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Old 05-08-08, 08:43 PM
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Looks like too much leg extension. It's hard to tell if you're not actually pedaling though
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Old 05-08-08, 08:46 PM
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I wont comment on too high or too low since this is more a function of your own body. If you look at DWJO's position it is fantastic in terms of drag but not many people could hold that for a 40k. I think you will lower your front when you slide the extensions forward a bit.

If you are worried about a skinsuit go to the local sports store and get an under-armor type fitted shirt(starter makes one for about $15) and wear your bibs.

EDIT- and it does look a little high on your saddle but with the angle you have it tilted at I wouldn't change that till after you strech forward. The more forward you rotate around the BB the higher your saddle would need to be.
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Old 05-08-08, 09:01 PM
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Where's the iPod?
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Old 05-09-08, 05:57 AM
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Originally Posted by patentcad View Post
Where's the iPod?
I do want one, if for no other reason than to be like you.
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Old 05-09-08, 07:11 AM
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Can you move the helmet back on your head? It protects less but lets you keep your head lower. I guess it depends on your priorites lol.

cdr
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Old 05-09-08, 07:21 AM
  #10  
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I'm a big fan of the praying flandis position. Give it a shot, running the bars angled up and putting my nose between the extensions is a good bit faster, and gives me a point of reference ensuring I don't move around so much.
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Old 05-09-08, 07:34 AM
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Originally Posted by Snuffleupagus View Post
I'm a big fan of the praying flandis position. Give it a shot, running the bars angled up and putting my nose between the extensions is a good bit faster, and gives me a point of reference ensuring I don't move around so much.
I think you might be on to something here. Rotating the aero bars like that would, in effect lower me in the front without changing the stem. I'll give that a test shot or two in the coming weeks.

I only have 6 weeks to get used to this setup, but other than Tue. night crits, I'll putting most of my efforts towards this TT. Also, I plan to get on the actual course at least 3 times.
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Old 05-09-08, 08:13 AM
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For aero concerns side view means nothing. Front view should be main area of concern
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Old 05-09-08, 10:03 AM
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Originally Posted by curiouskid55 View Post
For aero concerns side view means nothing. Front view should be main area of concern
Sadly, no. Frontal area is important of course; but since drag is the product of both frontal area, A, and drag coefficient Cd; and since Cd depends on the shape of the body as a whole; and since the wind is rarely directly head on so A depends on the side area as well, a side view has more to show than the front view.
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Old 05-09-08, 10:24 AM
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Originally Posted by asgelle View Post
Sadly, no. Frontal area is important of course; but since drag is the product of both frontal area, A, and drag coefficient Cd; and since Cd depends on the shape of the body as a whole; and since the wind is rarely directly head on so A depends on the side area as well, a side view has more to show than the front view.
Agreed but I'd put it a little more mildly: yes, frontal area dominates, but a side photo tells us more about how you got that FA then a frontal photo, so it's a better diagnostic tool.
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Old 05-09-08, 12:01 PM
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Originally Posted by carpediemracing View Post
Can you move the helmet back on your head? It protects less but lets you keep your head lower. I guess it depends on your priorites lol.

cdr
Big +1. I wear mine at my scalp line. You want a smooth line flowing into your back.
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Old 05-09-08, 12:37 PM
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Originally Posted by king-tony View Post
Big +1. I wear mine at my scalp line. You want a smooth line flowing into your back.
Got it. I'm going to use this helmet for the first time in the morning for a 20k TT on the tandem. I'll push it way back as best as I can.

I think they look pretty dorky, but my daughter loves it. She wants one so bad it's funny. She'll have to grow some though, they don't make them to fit 9 year olds.
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Old 05-09-08, 03:28 PM
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Originally Posted by Shayne View Post
Got it. I'm going to use this helmet for the first time in the morning for a 20k TT on the tandem. I'll push it way back as best as I can.

I think they look pretty dorky, but my daughter loves it. She wants one so bad it's funny. She'll have to grow some though, they don't make them to fit 9 year olds.
I don't know, my Giro is tiny.
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Old 05-09-08, 06:48 PM
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Originally Posted by king-tony View Post
I don't know, my Giro is tiny.
Made a deal with Curveship for a small L.G. Rocket. Even if she can't get into it right away, she'll be stoked.
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Old 05-09-08, 07:55 PM
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So will be testing at Greenville in the morning? See you there?

It could stop raining anytime now!
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Old 05-09-08, 08:28 PM
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Originally Posted by R900 View Post
So will be testing at Greenville in the morning? See you there?

It could stop raining anytime now!
enjoy the chip seal
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Old 05-09-08, 08:54 PM
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Originally Posted by daytonian View Post
enjoy the chip seal
Chip seal.........we love chip seal!!!!
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Old 05-10-08, 06:08 PM
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Rotated the aero bars down into a semi-Landis like postion. This really works to get you low. My daughter and I laid down a personal best of 34:04 for 20k at this mornings TT in Greenville, OH. I know that doesn't seem to fast to most so I'll list some excuses. The course is pretty rolly and is all chip-seal. Also, I'm on a 40 lb. bike with a 9 yr. old girl. That's all I got.

After the TT, I went down to our teams 10 mile TT course and put down another personal best. My legs are burnt toast.
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Old 05-10-08, 07:31 PM
  #23  
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Much better than my TT position. But my bike isn't setup to be a race bike (I've since flipped the stem and my position looks a little better)
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