Saturday, September 14, 2019

September 14, 2019 First 62 Lap ride in Memory of Derrick Davis

Today we rode 62 Laps at Kissena Track in memory of Derrick Davis who died a couple of months shy of his 62nd birthday. Derrick was our training partner at Kissena, so myself, Doug, Terry and Robby found it fitting to bring five bicycles and ride 62 laps in his memory. The fifth bicycle was for Derrick as a symbolic gesture. He was probably doing laps in heaven as he smiled down at us whilst we were riding the 62 Laps. We plan on doing this ride every September after Labor Day just to keep his memory alive.

Saturday, December 29, 2018

Zipp 900 Rear Track Disk Wheel

I am selling this Zipp 900 Rear Track Disk wheel which I bought in 2015 and only used it two times. I can’t justify keeping it since I hardly use it. It’s in Excellent condition.

Selling it for $1,000 US with extra additional items, see photos below. It is ready to place on your track bike, all you need to do is put air in the tire.

-Zipp 900 Rear Disk
-Tufo Tubular
-Nashbar Wheel Bag
-Device for pumping up tire

If interested then send me an email at

Thursday, September 21, 2017

Less is More - 2017 NY Track State

I would never have expected to win anything this year at the NY States Track Cycling event. All my training was done on a Saris Cyclops 300PT spin bicycle and I lifted weights in my living room. I went to the track two times this year, it was what I called the lazy form of training. I was so lazy that I did not even bother to change gears during the two days of racing. I took the bicycle to the track with a 50x14 = 96 inch gear to do my events, even the warm up. I was entered in the Master’s 40 plus Sprint Omnium. I figured the 96 inch gear was a good compromise for the three events which I entered based on my PERT estimate in post below.
·        Keirin – gear used 96 inch – result 1st place
·        Flying 200 Meter – gear used 96 inch – result 2nd place – time 13.94 seconds
·        500 Meter – gear used 96 inch – result 3rd place – time 41.56 seconds
·        Sprint Ominium – 1st place in Masters 40 plus category.

I definitely did not have the snap in my legs which can only come from training at the track and Motorpacing. The Wheels I used were a Zipp rear tubular disk with a Mavic Ellipse front clincher wheel. I'm starting to think disk wheels are overrated for certain events. 

Comparison of times:
·        2015 Flying 200 Meter – 13.06 seconds with 52 x 13 = 108 inch gear and Mavic Ellipse Spoked wheels (2nd place)
·        2015   500 Meter – 40. 91 seconds with a 50 x 15 = 90 inch gear and Mavic Ellipse Spoked wheels (3rd place)

·        2017 Flying 200 Meter  -  13.94 seconds with 50 x 14 = 96 inch gear and Zipp rear disk with Ellipse front spoked wheel (2nd place)
·        2017  500 Meter – 41.61 seconds with a 50 x 14 = 96 inch gear and Zipp rear disk with Ellipse front spoked wheel (3rd place)

The weather was definitely colder this year since the States Championships were held after Labor Day, this resulted in denser air and possibly less master riders attending due to other commitments. I find the Mavic Ellipse spoked wheels are easier to control at Kissena and also the rolling inertia of these heavier wheels result in faster times for me. The lighter Zipp disk would be more appropriate for the Kilo, Pursuit and Endurance events, I never found a disk wheel to be advantageous for me at Kissena in the flying 200, 500 meter and Match Sprints. I have ridden consistently faster flying 200 meter times (12.50 to 12.70) in training in a 108 inch gear at Kissena with the heavier Mavic Ellipse clincher wheels. 

In the 500 meter time trial, I messed up the startl, I was not accustomed to the electronic timing and I got the rhythm wrong on the start. In retrospect I should have had someone hold me so I could practice a few standing starts 15 minutes before my event. Instead I choose to do a few rolling starts which are not quite the same. Standing starts require the body to be primed and in a state of arousal, in synch with the timing mechanism. Time trials on the track are won by fractions of a second. The potential to lose time in the 500 meter and Kilo events is in the standing starts, especially with bigger gears. 

9/10/2017 Weather Conditions at about 9:00am
Density Altitude = minus 403 feet (more aerodynamic resistance to overcome)
Dew point = 44.7 degrees F
Pressure = 30.27
Temperature = 57.2 degrees F
Humidity = 63%
Conditions were pretty much similar for 9/92017 and 9/10/2017.

Hot and humid conditions will result in a higher density altitude which could result in faster times if you can deal with the heat. So even though Kissena Velodrome might be at about 50 feet above sea level the density altitude could be at 1,000 feet on hot and humid days which means less dense air for the body and bicycle to overcome. 

Saturday, September 19, 2015

PERT Estimate and Triangular Estimation for Gear Selection

Triangular Estimation or PERT Estimate is used for an approximate probability distribution or range estimate in Project Management. I suppose one can use the same technique to select gear ratios to ride on the track based on historical data of the rider, equipment and type of track being used.

The PERT Estimate formula is P + 4(R) + O divide by 6

P = Pessimistic
R = Realistic
O = Optimistic

The Triangular Estimate is P + R + 0 divide by 3

So for example based on historical data of the rider and the events, you can estimate what gear to use by using the PERT Estimate or Triangular Estimate:.

Flying 200 Meter at Kissena Velodrome

Pessimistic gear ratio = 90"
Realistic gear ratio = 96"
Optimistic gear ratio = 108"

Using PERT Estimate
Therefore: 90 + 4(96) + 108 divide by 6 = 97" gear ratio

Using Triangular Estimate
Therefore: 90 + 96 + 108 divide by 3 = 98" gear ratio

500 Meter at Kissena Velodrome

Pessimistic = 90"
Realistic = 92"
Optimistic = 96"

Using PERT Estimate
Therefore: 90 + 4(92) + 96 divide by 6 = 92.3"

Using Triangular Estimate
Therefore: 90 + 92 + 96 divide by 3 = 92.6"

Lets say you need to select one gear to take part in several events but you are too lazy to change the gears for each event, you can use the estimating technique to chose an appropriate gear for all events. Lets say the three events are SCRATCH, MISS & OUT and POINTS RACE.

MISS &  OUT = 88"

Using PERT Estimate
Therefore: 88 + 4(90) + 92 divide by 6 = 90"

Using Triangular Estimate
Therefore: 88 + 90 + 92 divide by 3 = 90"

I will be using these formulas more often since I have the historical information I need for gears which I have used for various events at Kissena Velodrome, it would definitely prevent me from reinventing the wheel and selecting wrong gears after a long lay off from racing on the track.

Of course other variables to take into consideration are:

Density Altitude
Track Conditions
Time of Season
Your level of fitness
Your optimum cadence range - mine is 110 rpm

Monday, September 7, 2015

9 7 2015 Kissena Track Labor Day Races

Most Photos taken by Avelino and Teressa Pereira - thanks guys.

Didn't have the fitness required for these longer track races. I finished fifth in the six lap 45 plus scratch race and couldn't finish any of the other races. Lack of endurance training with longer intervals and partial recovery is required for these types of events. Rode a 96 inch gear today - 50 x 14.....gearing was a little bit ambitious, should have rode a 92 inch.