Posts tagged ‘ibike’

Spring climbing

After yesterday’s long climbs in Huntsville, today was a different style of climbing – numerous short, steep climbs. Check out the iBike gradient graph:

Numerous climbs – click to enlarge and count the changes in gradient from up to down and then post in the comments how many “hills” there are. I don’t have time to count but I would guess 100-200 hills instead of maybe 20-30 hills yesterday?

Also, I was inspired while riding through Mountain Brook to post some pictures of the beautiful spring flowers. I didn’t have my camera with me – so I’ll have to post a few of the pics from my parent’s house this past Sunday. Imagine riding past house after house with all different kinds of blooming flowers – particularly azaleas, dogwoods, and bradford pears. It was an interesting contrast to yesterday’s ride in Huntsville, which went through some really rural countryside where instead of the tended flowers, you get wildflowers in the fields and beautiful dogwood trees blooming underneath all the really tall pine and hardwood trees in the woods. Two contrasting climbing rides, two contrasting spring flower explosions, two fun adventures.

redbuds, azaleas, and a couple dogwoods

March 21, 2012 at 4:41 pm Leave a comment

Climbing to the moon

Annotated ride map (click to enlarge)

It’s spring break this week in Alabama, and so my good friend Lennie and I took our families up to Huntsville to the space and rocket center. While they were enjoying exploring all about space, Lennie and I drove on over to Keel Mountain to explore it and Green Mountain. We ended up climbing Keel Mountain 3 different ways and Green Mountain from both sides. Then I headed back up the front side of Keel one final time. The descents were awesome hitting 55mph+ on four different descents. My favorite of the day was definitely the Green Mountain west side descent which has a horizon drop-off (i.e., where you can’t see over the horizon) at >50mph. Exhilarating. It was REALLY flat though between the mountains, but it was worth it to enjoy time riding with Lennie and to explore 5 new climbs! I’ve posted the iBike data for each of the five different climbs. The last climb up Keel (Blowing Cave Rd) was by far the steepest at 26% max gradient, although the east side of Green Mountain was steeper for longer sustained sections.

Annotated iBike data for the entire ride (click to enlarge)

KEEL MOUNTAIN NORTH SIDE (1st time up)
Dist:        1.61 mi (0:13:31)
Energy:     208.8 kJ
Climbing:     837 ft (Strava CAT 3)
          Min   Avg    Max
Power       0  257.4   527  W
Gravity   -22  231.0   509  W
Speed     0.0    7.2  21.9  mi/h
Elev      469    896  1306  ft
Slope    -0.3   9.71  16.8  %
Caden       0   62.5    93  rpm
HR        104  150.3   163  bpm
NP:264W IF:0.95 TSS:20 VI:1.03
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 11:36 AM
90 degF; 1012 mbar

NOTES: We passed a HOUSE on the climb that was being pulled 
up the mountain. They got stuck in one of the switchbacks. 
There are two switchbacks on the climb. The descent is crazy
fast - you've just got to remember when to jam on the brakes
before the two switchbacks.
KEEL MOUNTAIN SOUTH SIDE
Dist:        1.90 mi (0:15:27)
Energy:     217.0 kJ
Climbing:     855 ft (Strava CAT 3)
          Min   Avg    Max
Power       0  234.1   442  W
Gravity  -275  205.4   419  W
Speed     3.6    7.4  19.1  mi/h
Elev      479    938  1332  ft
Slope    -4.4   8.39  22.8  %
Caden      34   61.6    98  rpm
HR        110  140.3   156  bpm
NP:245W IF:0.88 TSS:20 VI:1.05
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 12:12 PM
87 degF; 1012 mbar

NOTES: This was a pretty steep climb. The 22.8%
max gradient was taking a diabolical inside path
on one of the switchbacks. This had a lot more
twisty sections and was a generally fun climb, but
tricky descent. The best part of the descent is 
at the top as you are coming off the mountain
as the descent starts out with a switchback 
that makes you feel like you are diving off
the top of the mountain for a free-fall.
GREEN MOUNTAIN WEST SIDE
Dist:        1.15 mi (0:11:07)
Energy:     169.5 kJ
Climbing:     690 ft (Strava CAT 3)
          Min   Avg    Max
Power      76  254.1   371  W
Gravity    11  232.4   360  W
Speed     4.2    6.3  16.7  mi/h
Elev      462    805  1158  ft
Slope     0.2  11.20  23.9  %
Caden      41   56.1    96  rpm
HR        120  150.8   166  bpm
NP:263W IF:0.95 TSS:17 VI:1.03
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 1:19 PM
92 degF; 1012 mbar

NOTES: I've heard that this is one of the toughest
climbs in Huntsville. It was definitely steep with some
sustained 20+% gradients. At the last turn before the top
there was a car that had rolled and looked like it was left
there to warn people of the danger of the descent. It 
had police tape all over it with busted out windows. The
descent was amazingly fast but kinda dangerous. The 
car that had rolled was in a decreasing radius turn that
almost caught me off. Then you have a really fast section
into a sweeping turn that you can pretty much hit without
brakes leading into the fastest part of the descent. YOU
HAVE TO HIT THE BRAKES HARD LEADING INTO THE LAST LEFT!
I knew it and hit the brakes hard but I still almost didn't
slow down enough.
GREEN MOUNTAIN EAST SIDE
Dist:        1.82 mi (0:15:25)
Energy:     222.7 kJ
Climbing:     829 ft (Strava CAT 3)
          Min   Avg    Max
Power       0  240.8   358  W
Gravity   -63  209.2   353  W
Speed     3.9    7.1  17.3  mi/h
Elev      458    853  1294  ft
Slope    -1.2   8.88  18.4  %
Caden       5   59.8    92  rpm
HR        103  148.0   164  bpm
NP:253W IF:0.91 TSS:21 VI:1.05
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 1:45 PM
87 degF; 1012 mbar

NOTES: I had climbed this once before, and it is still
really steep. It starts out with cement that has been
grated at the bottom to helps cars get traction. Then
it eases up a bit and rolls a bit on the way up. This
may be one of the coolest descents I've done with 
the rollers coming at 50+mph so that you have at least
one horizon drop-off.
KEEL MOUNTAIN BLOWING CAVE (STEEP!!!)
Dist:        2.19 mi (0:13:30)
Energy:     211.7 kJ
Climbing:     756 ft (Strava CAT 3)
          Min   Avg    Max
Power      89  261.4   431  W
Gravity  -462  206.1   461  W
Speed     3.4    9.7  24.8  mi/h
Elev      563    921  1326  ft
Slope    -6.9   6.40  26.2  %
Caden      30   63.1    97  rpm
HR        119  156.8   177  bpm
NP:281W IF:1.01 TSS:23 VI:1.07
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 2:46 PM
85 degF; 1012 mbar

NOTES: This was by far the steepest climb
with several sections above 20% including one
26.2% section NOT in a switchback. There
is some gravel and dirt sections that are not
too rough but can catch you by surprise on the
descent. Still, you can get some speed on the
super steep sections because they are fairly
straight. Watch the dogs at the top and the bottom
of the climb/descent.
KEEL MOUNTAIN NORTH SIDE (2nd time up)
---------Selection Stats---------
Dist:        1.61 mi (0:12:29)
Energy:     213.6 kJ
Climbing:     820 ft (Strava CAT 3)
          Min   Avg    Max
Power      64  285.2   418  W
Gravity   -38  253.2   397  W
Speed     5.4    7.8  23.0  mi/h
Elev      561    976  1382  ft
Slope    -0.5   9.82  16.2  %
Caden      51   66.6    98  rpm
HR        131  169.5   179  bpm
NP:288W IF:1.04 TSS:22 VI:1.01
CdA: 0.342 m^2; Crr: 0.0039
168 lbs; 3/20/2012 3:15 PM
84 degF; 1012 mbar

NOTES: I wasn't going for the KOM, but I
was trying to put in a good time on this and ended
up 2nd behind Mark Fisher by almost a minute. That
would be a tough time to beat. Kudos to him!

Keel Mountain – north side – first time up

Keel Mountain – south side

Green Mountain – east side

Green Mountain – west side

Keel Mountain – Blowing Cave Rd

Keel Mountain – north side – 2nd time up

March 20, 2012 at 8:38 pm 2 comments

iBike, youBike, weAllBike

iBike graph for my entire ride – annotated from within iBike (click to enlarge)

Happy days are here again as I have remounted my iBike Dash with Power. Props to the good folks at iBike who repaired a broken enclosure bracket on my iBike Dash device and a broken LCD screen on my iBike Gen III device – for free, even though my Gen III was out of warranty. Those of you who know me well (or even partially well), know that I’m pretty much obsessed with topographical maps, bike riding, and analyzing bike ride data — especially climbing related data. The screenshot above is from my commute home from work.

The iBike Dash clearly has the best in-ride graphical user interface of all bike computers/GPS devices — making full use of the color iPhone touch screen (see this post for screenshots – http://toonecycling.wordpress.com/2011/04/21/equipment-update-ibike-dash-power-meter-wheels-and-tires-galore/). But the best two features of the iBike for me are the internal gyrometer for measuring slope and the iBike ride analysis software, which in my opinion, is the best graphing software for displaying power, cadence, elevation, heartrate, and slope all on one screen. The slope is obtained using an internal gyrometer, which is much more accurate than a barometric obtained gradient as the barometer can never catch up with the slope changes in a severely rolling area (such as where I live).

iBike slope graph for a particularly insane section of rollers

On my way into work today, I figured out a topic for my next journal article — developing an algorithm for analyzing ride data from any device, combined with data reported from other devices for the same segments, combined with survey-based and/or radar acquired elevation data to come up with a “best fit” elevation profile. On my way home from work, I was inspired to do a climbing route with some of the steeper climbs on Shades Mountain and Little Valley Mountain including a nearly 30% driveway off of Altaloma. Here is the topocreator map:

Annotated topocreator map of a climbing route home from Samford (click to enlarge)

About the journal article I am going to write, look at the complete iBike stats below, particularly note the “Climbing” amount. The iBike only registers 4000′ of climbing, whereas the Garmin registered nearly 5700′. The zoomed in iBike graph below the stats shows why. Even with a 29% gradient climbing at least 30 feet, the barometric sensor only registered a 2 foot climb for the entire driveway since I turned around and immediately skidded my way back down the driveway across the road and into the grass on the other side (I can’t imagine the wear and tear on the brakes of whoever lives in that house). Even the iBike gyrometer couldn’t turn around fast enough from the extreme climb to the extreme descent with it only registering a 2 or 3% descent even though it should have been -29%. Interestingly, the Garmin registered 30 feet of climbing for the driveway and 25 feet of descending even though I noticed that the % gradient was pegged at +17% the whole way down the driveway. I guess the % display only updates itself at a slower rate than the internal elevation recording.

Dist:       34.55 mi (2:27:57)
Energy:    1631.9 kJ
Cals Burn: 1560.1 kcal
Climbing:    3997 ft
Braking:   -270.5 kJ (-16.6%)
          Min   Avg    Max
Power       0  183.8   717  W
Aero        0  102.7  2471  W
Rolling     0   25.6   101  W
Gravity -3620  -11.0   548  W
Speed     0.0   14.0  56.3  mi/h
Wind      0.0   15.3  49.0  mi/h
Elev      188    477   851  ft
Slope   -20.2  -0.24  29.2  %
Caden       0   73.9   118  rpm
HR         66  123.1   164  bpm
NP:216W IF:0.72 TSS:128 VI:1.18
CdA: 0.342 m^2; Crr: 0.0055
168 lbs; 2/10/2012 11:28 AM
56 degF; 1013 mbar

Zoomed in S Cove Dr descent (56mph) plus Altaloma driveway climb (29%) – click to enlarge. Demonstrates fundamental problem with barometric pressure sensors for altitude measurements in constantly changing terrain.

Altaloma driveway climb
Altaloma driveway climb
Renfroe climb – S Cove descent – Altaloma driveway climb (click to enlarge)

February 10, 2012 at 6:25 pm Leave a comment

Schlitz Park Criterium – Tour of America’s Dairyland – Day 6

Strava map highlighting one lap of the race.

This has to be one of my all-time favorite criterium courses, although I would not want to race it in the rain. Fortunately for us in the pro men’s field, we dodged the thunderstorms and raced on a completely dry course. This was not the case for races earlier in the day, including the pro women’s field (see pics in the gallery below). The race starts on Pleasant St at river level (Milwaukee River). The first turn takes you onto Brewer Hill where you climb all 68 ft that course gains in one shot. Then after a flat section across the top, you dive down through a series of twists and turns to make it back down to Pleasant St for the finishing sprint. In the middle of the race, I was thinking how beautiful it was to be following a single file line of riders through so many turns at speeds approaching 35mph on the downhill series of turns lap after lap. This was the most technical course of the entire series, and there were no wrecks!

Here is how the race played out – a small break established itself within the first few laps of the race. They stayed away for the entire race, but never lapped the field. Towards the middle of the race, I tried to get into a chase group. This lasted for a lap. Then with 5 laps to go, another move went off the front of the field. I saw it but hesitated. Then I decided to jump anyway and rode the rest of that lap and part of the next one solo trying to chase back onto the chase group. It was all for naught though, because the field caught me and eventually reeled back in the chase group with 3 laps to go. I had burned a lot of matches with that move, but I still really wanted a top 20 result so I fought hard to move up on the last two laps and ended up 19th.

iBike stats – a couple interesting things highlighted in red. The interesting thing about the braking is how little there was of it. You really didn’t have to brake that much anywhere on the course because everybody was so smooth!

6/21/2011   6:10 PM
Dist:       37.37 mi (1:30:12)
Energy:    1608.7 kJ
Cals Burn: 1537.9 kcal
Climbing:    3468 ft
Braking:    -24.5 kJ (-1.5%)

       Avg   Max
Power 297.2 1125 W
Speed  24.9   36 mi/h
Wind   19.1   36 mi/h
Caden  77.0  118 rpm
HR    158.3  177 bpm

iBike graph – note the entire lap solo with 5 to go … not a very good way to save energy for the finish …

And here are my Strava lap splits … with a link to the interactive strava data here – http://app.strava.com/rides/786672

       DIST   ELEV  SPEED    POWER     HR      TIME
Lap 1  0.7 mi 68 ft 23.1 mph 268 watts 151 bpm 0:01:55
Lap 2  0.7 mi 68 ft 25.1 mph 348 watts 160 bpm 0:01:46
Lap 3  0.7 mi 68 ft 25.5 mph 342 watts 161 bpm 0:01:44
Lap 4  0.8 mi 68 ft 25.1 mph 352 watts 161 bpm 0:01:46
Lap 5  0.7 mi 68 ft 25.3 mph 351 watts 163 bpm 0:01:45
Lap 6  0.7 mi 68 ft 24.8 mph 318 watts 159 bpm 0:01:47
Lap 7  0.7 mi 68 ft 26.3 mph 351 watts 161 bpm 0:01:41
Lap 8  0.7 mi 68 ft 26.8 mph 370 watts 166 bpm 0:01:39
Lap 9  0.7 mi 68 ft 24.8 mph 293 watts 159 bpm 0:01:47
Lap 10 0.7 mi 68 ft 24.4 mph 306 watts 154 bpm 0:01:49
Lap 11 0.7 mi 68 ft 25.8 mph 331 watts 156 bpm 0:01:43
Lap 12 0.8 mi 68 ft 24.4 mph 349 watts 158 bpm 0:01:49
Lap 13 0.7 mi 68 ft 25.8 mph 341 watts 162 bpm 0:01:43
Lap 14 0.7 mi 68 ft 23.9 mph 296 watts 157 bpm 0:01:51
Lap 15 0.7 mi 68 ft 24.8 mph 323 watts 156 bpm 0:01:47
Lap 16 0.7 mi 68 ft 25.3 mph 347 watts 157 bpm 0:01:45
Lap 17 0.7 mi 68 ft 26.3 mph 349 watts 158 bpm 0:01:41
Lap 18 0.7 mi 68 ft 25.5 mph 350 watts 158 bpm 0:01:44
Lap 19 0.7 mi 68 ft 24.8 mph 319 watts 158 bpm 0:01:47
Lap 20 0.7 mi 68 ft 25.8 mph 351 watts 159 bpm 0:01:43
Lap 21 0.7 mi 68 ft 25.3 mph 368 watts 159 bpm 0:01:45
Lap 22 0.7 mi 68 ft 26.6 mph 381 watts 162 bpm 0:01:40
Lap 23 0.7 mi 68 ft 25.8 mph 372 watts 165 bpm 0:01:43
Lap 24 0.7 mi 68 ft 22.5 mph 287 watts 156 bpm 0:01:58
Lap 25 0.7 mi 68 ft 24.8 mph 310 watts 161 bpm 0:01:47
Lap 26 0.7 mi 68 ft 23.9 mph 335 watts 159 bpm 0:01:51
Lap 27 0.8 mi 68 ft 24.6 mph 358 watts 156 bpm 0:01:48
Lap 28 0.7 mi 68 ft 25.5 mph 353 watts 159 bpm 0:01:44
Lap 29 0.7 mi 68 ft 25.8 mph 365 watts 159 bpm 0:01:43
Lap 30 0.7 mi 68 ft 24.6 mph 340 watts 157 bpm 0:01:48
Lap 31 0.7 mi 68 ft 26.6 mph 391 watts 161 bpm 0:01:40
Lap 32 0.7 mi 68 ft 24.1 mph 317 watts 158 bpm 0:01:50
Lap 33 0.8 mi 68 ft 25.1 mph 368 watts 159 bpm 0:01:46
Lap 34 0.7 mi 68 ft 23.5 mph 302 watts 155 bpm 0:01:53
Lap 35 0.7 mi 68 ft 23.7 mph 300 watts 153 bpm 0:01:52
Lap 36 0.7 mi 68 ft 23.5 mph 302 watts 153 bpm 0:01:53
Lap 37 0.7 mi 68 ft 24.8 mph 340 watts 155 bpm 0:01:47
Lap 38 0.7 mi 68 ft 25.1 mph 352 watts 156 bpm 0:01:46
Lap 39 0.8 mi 68 ft 24.6 mph 330 watts 153 bpm 0:01:48
Lap 40 0.7 mi 68 ft 24.8 mph 328 watts 152 bpm 0:01:47
Lap 41 0.7 mi 68 ft 26.3 mph 362 watts 159 bpm 0:01:41
Lap 42 0.7 mi 68 ft 23.5 mph 322 watts 154 bpm 0:01:53
Lap 43 0.7 mi 68 ft 25.1 mph 334 watts 155 bpm 0:01:46
Lap 44 0.7 mi 68 ft 21.8 mph 257 watts 151 bpm 0:02:02
Lap 45 0.7 mi 68 ft 22.5 mph 258 watts 153 bpm 0:01:58
Lap 46 0.7 mi 68 ft 25.3 mph 352 watts 164 bpm 0:01:45
Lap 47 0.7 mi 68 ft 24.4 mph 353 watts 165 bpm 0:01:49
Lap 48 0.7 mi 68 ft 27.4 mph 397 watts 163 bpm 0:01:37
Lap 49 0.7 mi 68 ft 25.1 mph 382 watts 161 bpm 0:01:46
Lap 50 0.7 mi 68 ft 25.3 mph 339 watts 162 bpm 0:01:45
Lap 51 0.7 mi 68 ft 28.0 mph 439 watts 168 bpm 0:01:35

Finally, here is a gallery of pics from the day. Hover over each one for a caption.

June 21, 2011 at 11:40 pm Leave a comment

Greenbush Road Race – Tour of America’s Dairyland – Day 5

Notice anything missing in this picture??? Answer – my iBike came loose on one section of bumpy road. There was no way to tighten it back up while riding so I had to wait for one of the screws to come completely off. Then I could spin the iBike around to unscrew the other screw. Finished the race with the iBike and my iPhone in my pocket.

This was a fun race course through the Kettle Moraine State Forest area near Greenbush and Elkhart Lake. The course was rolling with several steep rollers having gradients well over 10%. I got into an early move that lasted 3/4 of a lap. The field brought us back, and I drifted too far back in the pack so I missed the counter attack and a subsequent chase group that hung in front of us for a while. Then as people in our group started to pull out of the race, the chase group left the field for good which meant that the rest of us were racing for something like 12th or 13th. Still, I wanted to make a race of it so I tried to get in a few moves, and I tried to keep the pace in the field rolling.

On the last lap, Steve Tilford attacked after exiting the forest. A couple guys bridged up to him, and I was sorta in disbelief that I had just missed another move. An ISCorp rider attacked into the headwind a little while later. I was at the front and determined not to just wait for a field sprint. So I attacked to bridge up to the ISCorp rider. I attacked hard and was able to get away cleanly. I looked behind and saw that the field hadn’t responded so I poured everything into it not saving anything for the sprint. I made it to the ISCorp rider right as we were making the lefthand turn to take us through a long section of crosswinds. We worked hard together and could see the field strung out behind, but they had waited too long to start chasing. Up ahead we were closing on the break of three who appeared to have merged with the remnants of the chase group that had been gone since the second lap. I need to see the results to see my exact placing to determine if that is what happened. In any case, we couldn’t quite close the gap to that group, but we stayed ahead of the field. I couldn’t compete with the ISCorp rider in the sprint after doing a lot of work so I sat up and eased in just ahead of the field.

iBike power data for half of the greenbush road race

Here is a map of the course, plus here is a link to interactive stats from the ride – http://app.strava.com/rides/778406.

And here are the Strava lap splits…

NAME  DIST   SPEED    POWER     HR      TIME
1 lap 9.9 mi 25.6 mph 375 watts 157 bpm 0:23:07
1 lap 9.8 mi 25.8 mph 376 watts 149 bpm 0:22:59
1 lap 9.9 mi 24.8 mph 343 watts 147 bpm 0:23:53
1 lap 9.8 mi 24.4 mph 328 watts 148 bpm 0:24:16
1 lap 9.9 mi 23.5 mph 302 watts 144 bpm 0:25:09
1 lap 9.9 mi 22.9 mph 287 watts 144 bpm 0:25:48
1 lap 9.9 mi 22.9 mph 279 watts 141 bpm 0:25:52
1 lap 9.9 mi 24.9 mph 338 watts 154 bpm 0:23:49

Finally, here is a gallery of pics from the day — some from the race and some from Minneapolis / St Paul where the rest of the family had a fun day on quite a few adventures of their own.

June 20, 2011 at 10:20 pm Leave a comment

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Abandoned bridge posts over western end of Eastern Lake. Plus, a well camouflaged frog Josiah spotted. Bridge out - we crossed it with our bikes after checking for alligators first. Swamp singletrack.

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Anaerobic Threshold:
Power:315 watts
Heart rate:180 bpm
Maximums:
Power:1097 watts (5s)
Heart rate:198 bpm (5s)
AT power estimated by critical power curve in Golden Cheetah, which predicts I should be able to maintain 315 watts for 1 hour.

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