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Search: Posts Made By: ofajen
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01-26-23, 07:32 AM
Replies: 155
Views: 3,740
Posted By ofajen

In case you didnít read the article I linked...

In case you didnít read the article I linked earlier, the author encouraged riders to not fall into the common habit of thinking that a single cadence is best, but to regard all cadences as useful to...
01-23-23, 11:40 AM
Replies: 155
Views: 3,740
Posted By ofajen

Iím not suggesting you are necessarily doing the...

Iím not suggesting you are necessarily doing the work of pedaling at 200 rpm. On a fixed gear going downhill, the bike will do whatever work you donít to move feet, pedals and legs at the relevant...
01-21-23, 04:06 PM
Replies: 23
Views: 500
Posted By ofajen

Glad if I was of any help. It's a reasonable...

Glad if I was of any help. It's a reasonable question since it seems counterintuitive to have different width numbers on the same tire. Good to know that this is just tire manufacturers following the...
01-21-23, 02:29 PM
Replies: 23
Views: 500
Posted By ofajen

The ETRTO created ISO 5775-1 for tires and 5775-2...

The ETRTO created ISO 5775-1 for tires and 5775-2 for rims. These were in place as early as the late 1990s if not before. This was an effort to create a comprehensive spec for the many tire sizes...
01-21-23, 10:52 AM
Replies: 29
Views: 637
Posted By ofajen

For flat bar or MTB type levers, I like the 1 or...

For flat bar or MTB type levers, I like the 1 or 2-finger type. Iíve had Tektro levers with sharper edges along the lever, but much prefer the levers with a more rounded cross section along the...
01-21-23, 09:51 AM
Replies: 23
Views: 500
Posted By ofajen

There are standards. There was a significant...

There are standards. There was a significant change at the start of 2020. ETRTO docs are not easy to get without paying a fair chunk but here is a quick summary article on the Vittoria website:
...
01-18-23, 08:12 AM
Replies: 28
Views: 744
Posted By ofajen

Our rec center has a room of spin bikes that have...

Our rec center has a room of spin bikes that have standard bike saddles (and a really wide Q or tread factor). Also dozens of various stationary exercise machines in a larger, open space on the upper...
01-17-23, 08:44 AM
Replies: 155
Views: 3,740
Posted By ofajen

The internal work of pedaling is a sharply...

The internal work of pedaling is a sharply increasing function of cadence. From Formentiís data it appears to be a cubic function. Anyway, you can assume 0.1 W/kg at 50 rpm, 0.3 W/kg at 70 rpm, 0.6...
01-16-23, 05:18 PM
Replies: 36
Views: 985
Posted By ofajen

OK. Sorry, I was just trying to make an applied...

OK. Sorry, I was just trying to make an applied math joke. Itís all good.

Otto
01-16-23, 05:13 PM
Replies: 145
Views: 3,722
Posted By ofajen

Huh. I wouldnít drink alcohol before or while...

Huh. I wouldnít drink alcohol before or while driving a four-wheeled vehicle that is gravitationally stable in the upright position.

So, it also never really occurred to me to drink alcohol and...
12-31-22, 02:24 PM
Replies: 104
Views: 4,879
Posted By ofajen

Iím also allergic to hard falls on the ground....

Iím also allergic to hard falls on the ground. One of the several benefits Iíve noticed this year from switching to only minimal or barefoot style shoes is that having zero heel has improved my...
12-30-22, 10:11 PM
Replies: 56
Views: 1,518
Posted By ofajen

Iím happy. Little change in weight or build since...

Iím happy. Little change in weight or build since the Carter administration.

Also, BMI is not very informative for fit athletes. It pretends to be a body fat metric, but is based on height and...
12-14-22, 09:24 AM
Replies: 311
Views: 9,287
Posted By ofajen

I hope itís notÖ that way I can feel naughty when...

I hope itís notÖ that way I can feel naughty when I do. 😊

Otto
12-14-22, 07:44 AM
Replies: 311
Views: 9,287
Posted By ofajen

I think it would be sobering to see the rolling...

I think it would be sobering to see the rolling resistance of a tire as a function of temperature. Lower temperature has a significant effect on the properties of rubber materials. My instinct is...
12-07-22, 08:00 AM
Replies: 40
Views: 1,270
Posted By ofajen

Iím another one who has benefited from moving to...

Iím another one who has benefited from moving to minimal, foot-shaped shoes. I was able to ride a bike in Nike Flyknit with a manageable amount of discomfort in the nail of my right big toe, but...
12-05-22, 08:12 PM
Replies: 311
Views: 9,287
Posted By ofajen

Reading the article, the part about elevated risk...

Reading the article, the part about elevated risk of heart attacks relates to susceptible individuals, particularly those with heart or lung disease.

Otto
11-12-22, 03:03 PM
Replies: 202
Views: 5,535
Posted By ofajen

Strength should not be a concern with a...

Strength should not be a concern with a fiber-reinforced resin frame. High strength to weight is a main reason (but not the only reason) the reinforced resin frames are so successful. Brittleness...
11-11-22, 10:47 AM
Replies: 202
Views: 5,535
Posted By ofajen

Not sure what you are trying to say here, but the...

Not sure what you are trying to say here, but the fatigue limit of steel and Ti is what makes stress cycle failure less of an issue while the lack of a fatigue limit for Al means that stress cycle...
10-29-22, 06:47 PM
Replies: 18
Views: 629
Posted By ofajen

Iím using the VP-538 on both bikes at the moment....

Iím using the VP-538 on both bikes at the moment. Rivbike sells it and calls it the Clem Smith pedal.

Otto
10-23-22, 04:19 PM
Replies: 72
Views: 2,382
Posted By ofajen

I have had little to no interest in racing since...

I have had little to no interest in racing since I started riding 55 years ago at the age of five. In my teens and twenties I did really a lot of rural highway rides, mostly solo but a fair number...
10-18-22, 12:00 PM
Replies: 55
Views: 1,903
Posted By ofajen

I have tinkered a lot with various bars over the...

I have tinkered a lot with various bars over the last five or six years. Just this summer that has included drop bars, flat bars with 6 and 15 degree sweep, partly swept touring bars about 30...
10-13-22, 08:32 PM
Replies: 131
Views: 4,162
Posted By ofajen

Your standing pedal force can exceed your weight,...

Your standing pedal force can exceed your weight, since you can counteract a higher pedal reaction force with an upward pull on the handlebar and not fly backwards (and up) off the bike. (Actually,...
10-12-22, 09:05 AM
Replies: 21
Views: 661
Posted By ofajen

At a minimum, if you are using old metal racing...

At a minimum, if you are using old metal racing pedals or modern clipless pedals, the shoe needs a stiff midsole to distribute pedal force over more of the foot other than just the part right over...
10-12-22, 09:00 AM
Replies: 131
Views: 4,162
Posted By ofajen

Riding only single speed for a couple years cured...

Riding only single speed for a couple years cured me of any issues about walking or jogging up very steep hills, but it ruined my patience for slow climbs in the saddle in low gears. Now I rarely...
10-11-22, 05:41 PM
Replies: 13
Views: 712
Posted By ofajen

I got some new running shoes about a month ago...

I got some new running shoes about a month ago with better fit and lower heel. Turns out Iíve only biked a couple of times since then. If Iím going to run, it works better to do that most days and...
10-05-22, 08:27 AM
Replies: 47
Views: 1,337
Posted By ofajen

I find that things work best if I ring the bell...

I find that things work best if I ring the bell several times from a distance as I approach. This gives the pedestrian more time to react and the sound isnít so loud and surprising.

On our...
10-03-22, 06:46 PM
Replies: 59
Views: 2,678
Posted By ofajen

Bet you could do it in Lake Wobegon. After all,...

Bet you could do it in Lake Wobegon. After all, all the children are above average. 😊

Otto
09-25-22, 08:56 PM
Replies: 32
Views: 1,287
Posted By ofajen

At a minimum, the muscles of your feet will...

At a minimum, the muscles of your feet will probably need to develop some strength they lack. With flexible running shoes and platform pedals, there is an exertion required in the muscles of the...
09-23-22, 08:14 PM
Replies: 45
Views: 1,477
Posted By ofajen

Sure, but skinned knees and elbows from a tumble...

Sure, but skinned knees and elbows from a tumble off a bike riding no hands at 15 mph is not quite like tumbling headlong off a skateboard platform at 50 mph when the inevitable unexpected happens. ...
09-22-22, 09:15 PM
Replies: 17
Views: 1,403
Posted By ofajen

With a coherent signal, you can listen down into...

With a coherent signal, you can listen down into the the noise about 15 dB, and we may be about to that point.

Otto
09-17-22, 08:43 PM
Replies: 52
Views: 1,560
Posted By ofajen

I have to laugh at myself. Iím sure Iíve posted...

I have to laugh at myself. Iím sure Iíve posted similar opinions here in recent years.

And yet, Iíve tried several bar options this summer, and both of my bikes now sport ordinary straight bars...
09-05-22, 09:27 AM
Replies: 20
Views: 1,333
Posted By ofajen

Nice post! Iím also a fan of trying stuff out to...

Nice post! Iím also a fan of trying stuff out to see what works for you.

I switched to flat pedals about six years ago when my kids started to ride more after decades of riding clipped in in some...
09-02-22, 07:31 AM
Replies: 47
Views: 1,032
Posted By ofajen

ďBikeĒ is a fluid and evolving concept in my...

ďBikeĒ is a fluid and evolving concept in my world. When it comes to frames, Iíve owned five since I bought my first one in 1975, three of which I have:

1) Azuki 23Ē road frame bought as a new...
08-31-22, 07:57 PM
Replies: 66
Views: 1,745
Posted By ofajen

Personally, I wouldnít worry. Iíve had great...

Personally, I wouldnít worry. Iíve had great service in recent years from Continental tires made in Germany, India and China and I donít have any qualms about buying any of them again.

Otto
08-27-22, 09:16 PM
Replies: 107
Views: 2,828
Posted By ofajen

Itís my goal to avoid the frustration of...

Itís my goal to avoid the frustration of answering questions about bike maintenance.

Otto
08-27-22, 10:46 AM
Replies: 744
Views: 20,616
Posted By ofajen

It always goes so well here in threads about...

It always goes so well here in threads about money and what things cost. 👍

Otto
08-23-22, 07:28 AM
Replies: 445
Views: 9,689
Posted By ofajen

I took a nice walk last night, but I forgot the...

I took a nice walk last night, but I forgot the bike.

Otto
08-12-22, 09:46 AM
Replies: 112
Views: 2,968
Posted By ofajen

In a sense, single speed makes things easier and...

In a sense, single speed makes things easier and simpler. If Iím on a route with a steep hill or two, like 25% or 30%, I know I will just get off and walk or jog up that portion. With platform...
08-10-22, 02:02 PM
Replies: 95
Views: 3,011
Posted By ofajen

I spend a lot of time out of the saddle,...

I spend a lot of time out of the saddle, particularly over anything rough, so arms and legs are the suspension. To my mind, suspension is for single track. YMMV.

Otto
08-10-22, 11:49 AM
Replies: 27
Views: 628
Posted By ofajen

Indeed, thatís way too big. An 18 should...

Indeed, thatís way too big. An 18 should suffice. 😀

Otto
08-04-22, 04:52 PM
Replies: 1,390
Views: 47,409
Posted By ofajen

That has not been my experience. Insoles help...

That has not been my experience. Insoles help better distribute the forces and avoid pressure points and the energy dissipated in compression of shoe insoles will almost surely be minuscule and...
08-04-22, 12:38 PM
Replies: 34
Views: 1,271
Posted By ofajen

Itís always been my preference to pull one or...

Itís always been my preference to pull one or both wheels and keep the bike in the back of the vehicle.

Otto
07-29-22, 12:45 PM
Replies: 108
Views: 3,275
Posted By ofajen

If you are used to riding on the flats at a...

If you are used to riding on the flats at a leisurely 12 mph and say 50 or 60 watts, then you likely wonít have a low enough gear to let you climb a 13% grade at the 1 mph that would let you pedal a...
07-26-22, 08:35 AM
Replies: 1,390
Views: 47,409
Posted By ofajen

To follow AlgarveCyclingís point, this major...

To follow AlgarveCyclingís point, this major study from last year shows the importance of exercise generally over weight loss:

https://www.cell.com/iscience/fulltext/S2589-0042(21)00963-9

From...
07-26-22, 08:10 AM
Replies: 35
Views: 1,462
Posted By ofajen

Continental Ultra Sport III is also made in 27 x...

Continental Ultra Sport III is also made in 27 x 1 1/4Ē.

Otto
07-25-22, 04:27 PM
07-24-22, 07:04 PM
Replies: 1,390
Views: 47,409
Posted By ofajen

Smart. Alternatively, she could have noted the...

Smart. Alternatively, she could have noted the equally disturbing statistic that 100% of people who buy racey bikes do, in fact, die.

Otto
07-24-22, 04:32 PM
Replies: 1,390
Views: 47,409
Posted By ofajen

I think the really disturbing statistic is that...

I think the really disturbing statistic is that 100% of people who are sold comfortable bikes will, in fact, die.

Otto
07-24-22, 04:15 PM
Replies: 17
Views: 800
Posted By ofajen

Both my bikes have zero offset posts but that...

Both my bikes have zero offset posts but that wasnít why I got them. Long years with a Campy two bolt offset post and Ideale leather saddles spoiled me on having the adjustability of the two bolt...
07-23-22, 06:41 AM
Replies: 1,390
Views: 47,409
Posted By ofajen

This is a perfect distillation of where you are...

This is a perfect distillation of where you are stuck. This is clearly your opinion, but you state it as a fact. What is important to any particular amateur rider is for the rider to decide, and the...
Showing results 1 to 50 of 520
 


 
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