Memorial Hermann Ironman Texas 2012 : Official Thread (Page 43)

dblbogy - 2012-05-02 11:40 PM

KSH - 2012-05-02 8:36 AM

dblbogy - 2012-05-01 8:34 PM

I, also feel undertrained. Especially on the bike. With only a couple of 80 mile rides and 2 weeks to go, I am hoping to get a 100 miler in this week.  I am pretty confident in the swim and on the run. I just don't know about that bike.

Since this is my first IM, people say I should just go and have fun. But, I have a hard time not having a time goal. I'm going to put it out there and maybe y'all can set me straight.

Swim 1:20.xx (2.00/100)  8:20

Bike 6:15.xx  (18mph) 3:00ish

Run 4- 4 1/2 hours  (9-10min/mile)

Finish between 7 and 7:30

Looked at your Training Log... Maybe you haven't done a lot of long rides... but your volume is there. Just don't blow it out on the bike, save it for the run. You will be fine.

 

Did my first century..5:43.58 with an eight minute stop to refill my bottles and eat a banana.  Thanks.  During the ride I kept thinking I have to run after this?

Great job!

No restroom stops? If so, try drinking more water. 

I'm doing top and bottom seperates, I hate the restriction of the tri suits-  I was hoping to wear bike gear under wetsuit but if it's not a good wetsuit temp IDK!!

Taper is killing my brain!!

Two, one at 50 miles (after refilling bottles and banana). Then again about 80. I think you're right about drinking more, though.

From what I understand if you wear a wetsuit you start 15 minutes later and still have the same cut off..

It's 10 minutes later.

Saw on TJ's facebook page that the water was up to 81 degrees today, whats the cutoff, 84?

Thanks, Just re-read it

I am still contemplating a wetsuit.  I can do the distance, and have done it 3 times in the pool, but at my slow pace I was chilled when I got out.  I also did a 1500 with the wetsuit when the pool had a heater problem and the water was 86 or so.  Overheating is not an issue for me.  Just have to decide if it is worth the 10 minute start delay.

Just found this too

12:30 on Friday, Chrissie Wellington will be at the expo for a Q&A followed at 1PM til 3PM doing a book signing.

OMG that is SO COOL.  Love her!

During the race I will go around 105-110 psi, but that is what I do on a daily basis anyways . 120 psi is my wheels suggested max. pressure, and I am not going that high. 

KSH - 2012-05-04 1:07 PM

birgi - 2012-05-04 12:44 PM

pvollands - 2012-05-04 11:07 AM Tire Pressure - pumping up pre-dawn in 75 F weather and racing in the sun at 90 F ...... how much do you back off from 120 psi (if any)?

During the race I will go around 105-110 psi, but that is what I do on a daily basis anyways . 120 psi is my wheels suggested max. pressure, and I am not going that high. 

Ditto.

My question was misunderstood - with the temperature rise will come an increase in tire pressure - is it something to consider when pumping up in the early hours when relatively cool or not?

pvollands - 2012-05-04 1:48 PM

KSH - 2012-05-04 1:07 PM

birgi - 2012-05-04 12:44 PM

pvollands - 2012-05-04 11:07 AM Tire Pressure - pumping up pre-dawn in 75 F weather and racing in the sun at 90 F ...... how much do you back off from 120 psi (if any)?

During the race I will go around 105-110 psi, but that is what I do on a daily basis anyways . 120 psi is my wheels suggested max. pressure, and I am not going that high. 

Ditto.

 

My question was misunderstood - with the temperature rise will come an increase in tire pressure - is it something to consider when pumping up in the early hours when relatively cool or not?

My point was that I would not go as high as the max. suggested pressure.

However, trying to answer your question:

According to Amontons (1702), there is a linear increase in pressure with temperature for air. And this linear increase is about 1/3 from 0C to 100C. Considering that from morning to midday the temperature will change from 75F (~23C) to 90F (~32C), there will be a temperature change of approximately 9C. So the overall pressure will increase by 1/3/(100/9) = ~1/33, which is about 3.63 psi. Hence, I do not think that it is something to consider .

Source: http://galileo.phys.virginia.edu/classes/152.mf1i.spring02/ThermProps.htm

(I hope I did not make any calculation mistakes :D.)