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Search: Posts Made By: Drew Eckhardt
Showing results 1 to 50 of 171
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10-13-20, 02:30 PM
Replies: 26
Views: 969
Posted By Drew Eckhardt

Caliper brake cables last indefinitely because...

Caliper brake cables last indefinitely because pivoting attachment points avoid flex and fatigue.

Brake housing can last a decade before the plastic cracks from sun exposure.

Derailleur shift...
09-28-20, 03:46 PM
Replies: 20
Views: 644
Posted By Drew Eckhardt

https://www.quora.com/Why-would-back-wheel-spokes-...

https://www.quora.com/Why-would-back-wheel-spokes-keep-breaking-spokes-bicycles/answer/Drew-Eckhardt

The spoke elbows have high stress from the forming operation because parts were never taken...
09-26-20, 09:01 PM
Replies: 66
Views: 1,791
Posted By Drew Eckhardt

Metabolic efficiency doesn't win races or...

Metabolic efficiency doesn't win races or minimize fatigue on long rides, and less is a good thing when you have over 7% body fat because reducing that makes you faster up hills.
Forum: Road Cycling
09-25-20, 05:26 PM
Replies: 83
Views: 3,892
Posted By Drew Eckhardt

With a power meter you can use RChung 's virtual...

With a power meter you can use RChung 's virtual elevation method to determine CdA and Crr.
Forum: Road Cycling
09-20-20, 04:06 PM
Replies: 83
Views: 3,892
Posted By Drew Eckhardt

Wider tires at lower pressure are more...

Wider tires at lower pressure are more comfortable but not slower, and that much pressure will slow you down with 25mm tires.

The pro peloton is all on 25mm tires, except the two teams sponsored...
Forum: Road Cycling
09-17-20, 09:55 PM
Replies: 22
Views: 1,241
Posted By Drew Eckhardt

A 185 pound rider with five pounds of...

A 185 pound rider with five pounds of water/shoes/clothes/helmet/flat kit on a 20 pound bike losing 5 pounds to the UCI minimum is 2.4% faster up the steepest hills, saving less than 90 seconds an...
09-16-20, 04:10 PM
Replies: 67
Views: 1,822
Posted By Drew Eckhardt

Yes. IMHO, cassettes with a two tooth jump before...

Yes. IMHO, cassettes with a two tooth jump before the 19 cog are unacceptable for road riding. I rode 13-21 8 cogs, 13-23 9, and currently use 13-26 10.

The pro-peloton didn't regularly ride...
Forum: Road Cycling
09-15-20, 06:05 PM
Replies: 83
Views: 2,787
Posted By Drew Eckhardt

With lungs the limiting factor and lung size a...

With lungs the limiting factor and lung size a function of height, sprinter chunkiness gives them a bad aerobic power to weight ratio. They also have a suboptimal fast versus slow twitch muscle...
Forum: Road Cycling
09-15-20, 05:19 PM
Replies: 20
Views: 757
Posted By Drew Eckhardt

I like that 11 speed still used carbon fiber...

I like that 11 speed still used carbon fiber weave which couldn't be confused with cheap coated aluminum and included a 12-13-14-15-16-17-18-19-21-23-25 cassette option. I'd buy Super Record 11 over...
Forum: Road Cycling
09-14-20, 09:31 PM
Replies: 72
Views: 3,370
Posted By Drew Eckhardt

A power driven training program using your...

A power driven training program using your current bicycle will do far more for your performance than a 15 pound UCI minimum weight bike with $2000 carbon fiber wheels and a $3600 SRAM Red eTap AXS...
Forum: Road Cycling
09-14-20, 09:23 PM
Replies: 72
Views: 3,370
Posted By Drew Eckhardt

Fix the rider and forget about better parts...

Fix the rider and forget about better parts except for good tires, an aero jersey, latex tubes, and a razor to shave your legs.

Splurge for a road aero helmet if you're feeling rich - it's a bad...
09-10-20, 01:18 PM
Replies: 47
Views: 2,165
Posted By Drew Eckhardt

It's a bad idea if you want new current...

It's a bad idea if you want new current Shimano/SRAM parts in a standard configuration. With the steep OEM discount, you can buy a complete bicycle from bikesdirect for not much more than the price...
09-02-20, 01:00 PM
Replies: 28
Views: 644
Posted By Drew Eckhardt

Two wraps of 16mm (5/8") wide 1 mil Kapton tape. ...

Two wraps of 16mm (5/8") wide 1 mil Kapton tape. Easiest tire installation, lowest cost, and least weight.
Forum: Road Cycling
09-02-20, 12:19 PM
Replies: 302
Views: 14,189
Posted By Drew Eckhardt

They suck 20W more than a decent tire at 20 MPH...

They suck 20W more than a decent tire at 20 MPH which is a 10% effort increase that can cut endurance from an hour to ten minutes, have a lousy ride, and aren't much more flat resistant when you're...
08-31-20, 05:13 PM
Replies: 25
Views: 841
Posted By Drew Eckhardt

I've always done all my own work, because apart...

I've always done all my own work, because apart from wheel building that takes less time than dropping off and picking up a bicycle and tool costs the first time aren't out of line with labor...
08-27-20, 05:46 PM
Replies: 217
Views: 15,056
Posted By Drew Eckhardt

Inexpensive. I use One $40 Continental...

Inexpensive.

I use

One $40 Continental GP4000SII $40 tire every 4500 miles, for $0.00889 each
One $25 chain every 4500 miles for $0.00556 each
One $90 shift mechanism in 25,000 miles for...
Forum: Road Cycling
08-27-20, 10:59 AM
Replies: 45
Views: 2,093
Posted By Drew Eckhardt

Yes, although I wasn't happy when I tried modern...

Yes, although I wasn't happy when I tried modern PI shorts.

Stiffer foam like the 120 kg/m^3 in the Elastic Interface Technology Comp HP pad used in many Voler shorts puts less pressure on your...
08-23-20, 10:29 AM
Replies: 39
Views: 1,249
Posted By Drew Eckhardt

The hand position on drop bar bikes is more...

The hand position on drop bar bikes is more ergonomic, making them comfortable on 100 mile, 200 km, 200 mile, etc. rides.

Aerodynamics and a supple set of road tires with low rolling resistance...
08-23-20, 08:46 AM
Replies: 12
Views: 483
Posted By Drew Eckhardt

It's the shape of the depression at the rim...

It's the shape of the depression at the rim centerline which determines how much slack you can create and the resulting ease of mounting tires.

0.010" larger diameter there can mean the difference...
08-17-20, 08:00 AM
Replies: 33
Views: 1,327
Posted By Drew Eckhardt

The advice is to stay seated and use low enough...

The advice is to stay seated and use low enough gears you can maintain your target power output at 50+ RPM for proper biomechanics.



It's not because you waste energy lifting your weight.

In...
08-16-20, 11:32 AM
Replies: 6
Views: 218
Posted By Drew Eckhardt

You don't need to do anything. 1992-2008 standard...

You don't need to do anything. 1992-2008 standard Campagnolo left ergo levers have 12 positions of which 6-7 are used for triples and 3-4 doubles.

Since don't benefit from low gears - just install...
08-13-20, 01:29 PM
Replies: 10
Views: 282
Posted By Drew Eckhardt

G-spring levers from 1992-2008 have 12 positions...

G-spring levers from 1992-2008 have 12 positions of which 6 or 7 are used for triple cranks and 3 or 4 doubles.

They'll even shift a quad setup like a tandem daVinci drive.

Ultrashift levers...
Forum: Road Cycling
08-04-20, 01:23 PM
Replies: 16
Views: 754
Posted By Drew Eckhardt

I think 8 tires which would be 4 pairs, noting...

I think 8 tires which would be 4 pairs, noting the current ones have life left.

I discard the rear tire after it wears out, move the front tire aft, and install a new tire in front. Doing that I...
08-03-20, 03:28 PM
Replies: 265
Views: 7,573
Posted By Drew Eckhardt

I use a GPS bike computer and am fully equipped...

I use a GPS bike computer and am fully equipped to handle mechanical problems.
08-01-20, 10:36 AM
Replies: 29
Views: 870
Posted By Drew Eckhardt

trichloroethylene or tetrachloroethylene sold as...

trichloroethylene or tetrachloroethylene sold as brake cleaner.

Unfortunately, they cause cancer and are illegal to sell in California.
07-31-20, 11:28 AM
Replies: 18
Views: 723
Posted By Drew Eckhardt

There's no compatibility per Graeme gfk_velo who...

There's no compatibility per Graeme gfk_velo who is the head UK Campagnolo tech.
07-29-20, 08:38 AM
Replies: 59
Views: 2,446
Posted By Drew Eckhardt

Retroreflective powder coated rims are a bigger...

Retroreflective powder coated rims are a bigger target.
...
07-27-20, 05:04 PM
Replies: 15
Views: 608
Posted By Drew Eckhardt

Cesar at 3D Bike Fit in San Francisco. ...

Cesar at 3D Bike Fit in San Francisco.

https://www.3dbikefit.com/
07-27-20, 01:17 PM
Replies: 15
Views: 608
Posted By Drew Eckhardt

No. I saw a fitter first who resolved...

No.



I saw a fitter first who resolved my issues, although seeing a doctor would have been smarter.
Forum: Road Cycling
07-26-20, 01:55 PM
Replies: 5
Views: 378
Posted By Drew Eckhardt

With housings cut correctly at right angles,...

With housings cut correctly at right angles, derailleurs don't go out of adjustment unless you bend something apart from slight settling within the first few hundred miles.

Rear housing loops get...
07-26-20, 01:09 PM
Replies: 31
Views: 786
Posted By Drew Eckhardt

Learn to build your own wheels. While time...

Learn to build your own wheels.

While time consuming, it's not difficult when you don't need to be fast enough to turn a profit. Jobst Brandt tested his book _The Bicycle Wheel_ by having his two...
07-26-20, 12:18 PM
Replies: 76
Views: 6,216
Posted By Drew Eckhardt

You don't want to do that. Your "easy"...

You don't want to do that.

Your "easy" efforts are too hard, recruiting fast twitch fibers so you don't train your slow twitch fibers.

Your "hard" efforts are too easy so you don't train your...
Replies: 12
Views: 1,191
Posted By Drew Eckhardt

You're more likely to ride two 40 km loops at a...

You're more likely to ride two 40 km loops at a fast endurance pace which will provide more benefit than 80 km at a slower pace.

Stress is proportional to the square of exertion in terms of both...
Forum: Road Cycling
07-26-20, 11:01 AM
Replies: 16
Views: 731
Posted By Drew Eckhardt

While not UPF rated, I haven't noticed even the...

While not UPF rated, I haven't noticed even the slightest hint of pink on rides starting before sunrise and ending after sunset although my skin covered by jerseys/shorts/socks is snow white and I...
07-26-20, 08:03 AM
Replies: 27
Views: 828
Posted By Drew Eckhardt

Nice supple 25mm tires at an appropriate...

Nice supple 25mm tires at an appropriate inflation pressure.

Lots of us like Continental GP4000SII tires as a good balance between ride quality, puncture resistance, and life.

Add your bike and...
07-23-20, 11:01 PM
Replies: 30
Views: 1,289
Posted By Drew Eckhardt

You use a full size frame pump which will inflate...

You use a full size frame pump which will inflate a 700x25mm road tire to full pressure in 90-100 strokes.

You bring two spare tubes which will usually work plus a patch kit with a sealed tube of...
07-22-20, 10:15 AM
Replies: 18
Views: 723
Posted By Drew Eckhardt

Yeah, although the G-spring levers require...

Yeah, although the G-spring levers require frequent rebuilds.

While the more durable Ultrashift levers do not (shifting like I have ADHD, I got 25,000 miles before breaking a spring) Campagnolo...
07-20-20, 08:19 PM
Replies: 45
Views: 2,151
Posted By Drew Eckhardt

I like 50-39-30 x 13-14-15-16-17-18-19-21-23-26...

I like 50-39-30 x 13-14-15-16-17-18-19-21-23-26 which is 1.15 for the Santa Cruz and Diablo mountains, but in peak form am the same size as Alberto Contador - 5'9.5", 135-137 pounds.

Twenty years...
07-18-20, 09:33 AM
Replies: 15
Views: 825
Posted By Drew Eckhardt

There are just a few specialized bicycle tools...

There are just a few specialized bicycle tools you'll need with specifics depending on which bicycles you work on. They aren't numerous - everything but my repair stand, wheel ruing stand, and wheel...
Forum: Road Cycling
07-15-20, 08:48 AM
Replies: 30
Views: 1,542
Posted By Drew Eckhardt

Metals fail due to fatigue, with the cycles...

Metals fail due to fatigue, with the cycles survived a function of average stress and variation.

In machine built wheels, parts of the elbows have high average stress because they were never taken...
07-10-20, 06:53 PM
Replies: 57
Views: 2,809
Posted By Drew Eckhardt

Modern textiles are even faster than shaved skin....

Modern textiles are even faster than shaved skin. This led to the UCI banning socks and overshoes higher than halfway between the ankle and knee, with officials enforcing compliance measuring sock...
07-09-20, 11:43 AM
Replies: 57
Views: 2,809
Posted By Drew Eckhardt

Shaved legs have a huge effect on aerodynamics...

Shaved legs have a huge effect on aerodynamics with 80% of drag coming from the meat bag atop the bicycle.

You can save 60-90 seconds over 25 miles which is more than a $2000 set of carbon fiber...
07-08-20, 08:03 AM
Replies: 66
Views: 4,821
Posted By Drew Eckhardt

Get a training plan. You will not get fast just...

Get a training plan. You will not get fast just riding around or trying to keep up with a faster group. That won't be difficult enough to stress your fast-twitch fibers to force training adaptations,...
Replies: 77
Views: 10,491
Posted By Drew Eckhardt

Nice looking used triples are fairly abundant in...

Nice looking used triples are fairly abundant in 130/74mm BCD or 135/74 for Campagnolo. 110/74mm is more difficult to find - I've been searching for a Stronglight Fission (preferably Titane) for...
07-07-20, 03:12 PM
Replies: 73
Views: 2,522
Posted By Drew Eckhardt

The issue is the maximum percentage difference...

The issue is the maximum percentage difference between adjacent cogs, not where it occurs unless that's next to the largest or smallest. With the big cog you do better not running out over having...
07-06-20, 07:54 PM
Replies: 73
Views: 2,522
Posted By Drew Eckhardt

Campagnolo 10 speed discontinued

Campagnolo's 2020-2021 catalog has no 10 speed groups, suggesting 10 speed cassette options will dwindle.

13-26 was out of stock every place I checked. 11-25 and 13-29 also appear to be missing in...
07-04-20, 04:03 PM
Replies: 53
Views: 2,786
Posted By Drew Eckhardt

Overnight your body converts fat into carbs via...

Overnight your body converts fat into carbs via gluconeogenesis, so you should generally have 25g of blood sugar (100 calories), 100g of glycogen in your liver (400), and 400g (1600) in your muscles...
06-30-20, 01:03 PM
Replies: 77
Views: 14,499
Posted By Drew Eckhardt

A microsd writer makes Edge 800 map updates far...

A microsd writer makes Edge 800 map updates far less painful.
Forum: Road Cycling
06-26-20, 09:36 AM
Replies: 48
Views: 2,724
Posted By Drew Eckhardt

Yes, they're nice. I've been riding the same...

Yes, they're nice.

I've been riding the same Litespeed Natchez frame since 1997. It was 8 cog Campagnolo when I first built it up, although I moved on to 9 with a new right index cam plus freehubs...
06-25-20, 09:30 AM
Replies: 24
Views: 1,173
Posted By Drew Eckhardt

I get 4,500 miles out of Campagnolo 10 speed...

I get 4,500 miles out of Campagnolo 10 speed chains which I replace due to degraded front shifting from increased side plate wear causing flexibility. At that point they've only elongated 1/32" over...
Showing results 1 to 50 of 171
 


 
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