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Search: Posts Made By: ofajen
Showing results 1 to 50 of 389
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01-23-22, 09:05 PM
Replies: 18
Views: 257
Posted By ofajen

There is at least a Schwalbe Winter 700x30C...

There is at least a Schwalbe Winter 700x30C studded tire.

I have moved to an S-Blade that is several inches above the rear wheel because my removable PDW fenders would tend to clog with mud due...
01-22-22, 03:21 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

First ride in a week. Total distance of 23 miles...

First ride in a week. Total distance of 23 miles but about a half mile ended up being a walk over treacherous ice in a shady stretch that had softened up, been ridden on by a couple of bikes and...
01-21-22, 12:04 PM
Replies: 203
Views: 5,735
Posted By ofajen

Yeah I take that for granted around here, being...

Yeah I take that for granted around here, being able to get on our trail system and ride for hours without any stops, noise, cars or stress. No stop and go at all. Iím grateful.

Otto
Forum: Road Cycling
01-20-22, 11:02 PM
Replies: 157
Views: 5,673
Posted By ofajen

Not in my low end, vintage SS world, but you do...

Not in my low end, vintage SS world, but you do have my sympathies. 😊

Otto
01-19-22, 07:36 PM
Replies: 42
Views: 1,514
Posted By ofajen

YMMV, but I kinda expect 26ers to not be at their...

YMMV, but I kinda expect 26ers to not be at their best on skinny tires. My RockHopper is a beast with 2.2Ē Continental tires. Iím running the nice versions with Black Chili compound. Currently...
01-18-22, 08:34 AM
Replies: 57
Views: 1,837
Posted By ofajen

Setting a good saddle height is very useful, and...

Setting a good saddle height is very useful, and perhaps the most important component of how a bike fits. It can change a bit for you over time depending on fitness and flexibility, so if things...
01-14-22, 10:47 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

I did my quick 17 mile out to Hindman Junction at...

I did my quick 17 mile out to Hindman Junction at the Katy and back. Yesterday on the MTB and today on the 700x32 bike. Lots of soft mud and standing water so I was pleased to be able to negotiate...
01-14-22, 07:45 PM
Replies: 16
Views: 462
Posted By ofajen

Iíve taken to always wearing sweatpants on rides...

Iíve taken to always wearing sweatpants on rides at 60F and below, just to help keep my knees warm. Sometimes my legs get sweaty, but I figure itís good to be cautious. Sorry, thatís really...
01-09-22, 04:58 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

I did 17 miles yesterday. Only about 10 miles...

I did 17 miles yesterday. Only about 10 miles today but it took a while. Colder today at 28 deg F. I got a leak in the rear tire heading out and had to stop four tines to put air in before I got...
01-09-22, 04:54 PM
Replies: 95
Views: 1,771
Posted By ofajen

How about 402 meters or 1/4 mile? Vroom vroom...

How about 402 meters or 1/4 mile? Vroom vroom sound or card in the spoke would be required. And laying down some rubber at the start, I think.

Otto
01-08-22, 10:22 AM
Replies: 64
Views: 2,378
Posted By ofajen

Weíre cooking with gas, now!

Weíre cooking with gas, now!
01-05-22, 09:00 AM
Replies: 4,261
Views: 663,835
Posted By ofajen

Last Friday it was over 60 deg F when I rode up...

Last Friday it was over 60 deg F when I rode up to Rocheport on the Katy. Missouri River and I-70 Bridge in the background.

...
01-05-22, 08:55 AM
Replies: 4
Views: 257
Posted By ofajen

Just my two cents. Iíve had great service from...

Just my two cents. Iíve had great service from KMC X8 series chains.

Otto
01-04-22, 10:20 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

I managed to get a quick 10 mile ride in after...

I managed to get a quick 10 mile ride in after getting work done and before it got dark outside. The next three days it will be below freezing all the time so I wanted to be sure to get out for at...
01-03-22, 09:38 AM
Replies: 54
Views: 2,055
Posted By ofajen

Thatís a fair point. My mid-80s Sprint frame was...

Thatís a fair point. My mid-80s Sprint frame was bottom of the line, but itís still a sturdy lugged frame made in Taiwan (by Giant if I have that right).

And after more than 30 years of what...
01-02-22, 01:43 PM
Replies: 54
Views: 2,055
Posted By ofajen

The Schwinn Sprint was their bottom of the line...

The Schwinn Sprint was their bottom of the line road bike in the 80s, which is saying something. About all that Iím using is the frame and headset. The rest is a pot pourri of my old ďgoodĒ bike...
01-01-22, 03:03 PM
Replies: 56
Views: 1,348
Posted By ofajen

Actually that is how you calculate the force of...

Actually that is how you calculate the force of air drag. It is proportional to s**2, where s = the relative wind speed = u + v, where u = wind speed and v = rider speed, in the simple case of a...
01-01-22, 01:25 PM
Replies: 499
Views: 72,139
Posted By ofajen

OK hereís the update on the Schwinn after getting...

OK hereís the update on the Schwinn after getting a stem that gets the bar clamp a bit lower. Now I can run the touring bars in the normal upright way and still have reasonable riding position.
...
Forum: Road Cycling
01-01-22, 01:00 PM
Replies: 65
Views: 2,544
Posted By ofajen

Back in August, I decided to remind myself what...

Back in August, I decided to remind myself what it feels like to fall off a bike from standing height onto rock strewn pavement while landing mostly on the hip, elbow and ankle on one side. Turns...
01-01-22, 12:26 PM
Replies: 56
Views: 1,348
Posted By ofajen

It may help if you think of the difference...

It may help if you think of the difference between using a pole to propel a punt versus paddling a boat. Different systems. The punt is more like a bike, since the force is applied to the bottom...
01-01-22, 10:25 AM
Replies: 56
Views: 1,348
Posted By ofajen

Simple. Itís just noting the difference between...

Simple. Itís just noting the difference between force and power.

Relative wind speed is what determines the force of air drag acting on bike and rider. But to require power (the rate at which you...
01-01-22, 12:46 AM
Replies: 56
Views: 1,348
Posted By ofajen

No. Force is the same. But power is the dot...

No. Force is the same. But power is the dot product of force and velocity. Velocity is how fast you are moving. So 25 mph in still air is more power than 15 mph into 10 mph headwind.

Sorry. Typed...
Forum: Road Cycling
12-31-21, 03:29 PM
Replies: 2,687
Views: 425,417
Posted By ofajen

Photos from todayís ride, taken on the Katy just...

Photos from todayís ride, taken on the Katy just north of I-70 crossing at Rocheport. Thatís the Missouri River.

...
12-31-21, 03:04 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

32 miles today. Mostly sunny, warming to 60 deg F...

32 miles today. Mostly sunny, warming to 60 deg F so just about perfect. The usual winds of 10-15 mph. I saw most of the regulars (cyclists and runners) out on the various trails.

Hereís a couple...
12-30-21, 11:07 AM
Replies: 60
Views: 1,624
Posted By ofajen

Thatís a great hack! I just keep a metal valve...

Thatís a great hack! I just keep a metal valve adapter in the patch kit I keep in the saddle bag.

Otto
12-29-21, 01:25 AM
Replies: 3,523
Views: 260,133
Posted By ofajen

23 miles today after the rain stopped. Mid-40s,...

23 miles today after the rain stopped. Mid-40s, mostly cloudy and delightfully messy on the trails.

Otto
12-21-21, 09:18 AM
Replies: 93
Views: 2,653
Posted By ofajen

It is the shortest daylight period but sunset...

It is the shortest daylight period but sunset started getting later around here on December 6 and sunrise wonít be the latest until around January 5. Itís a consequence of the elliptical orbit of the...
12-20-21, 12:08 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

Aren't they all? They would be for me. 😊 ...

Aren't they all? They would be for me. 😊

Otto
12-20-21, 09:29 AM
Replies: 24
Views: 1,309
Posted By ofajen

I just donít take the chain off until itís ready...

I just donít take the chain off until itís ready to be retired. I clear dust and dirt off with a paper towel or chain brush after most rides and then use Boeshield when it sounds like it needs it....
12-20-21, 09:07 AM
Replies: 3,523
Views: 260,133
Posted By ofajen

Only had time for 15 miles yesterday. Windy and...

Only had time for 15 miles yesterday. Windy and 34 F but my fingers were actually a bit hot in the mittens I got earlier this year. Thatís a good sign for even colder temps, as long as I can keep...
12-18-21, 02:07 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

23 miles today. Sunny, upper 30s and the usual...

23 miles today. Sunny, upper 30s and the usual 10-15 mph winter wind. My hands were a bit cold, so tomorrow Iíll try out my new mittens.

Otto
12-17-21, 08:20 AM
Replies: 92
Views: 3,785
Posted By ofajen

Interesting. I actively think about similar...

Interesting. I actively think about similar running motions when Iím OOS on a really steep section on my SS MTB. In particular pulling the foot through the bottom of the pedal stroke and back as it...
12-16-21, 05:03 PM
Replies: 86
Views: 3,230
Posted By ofajen

Hereís the figure that shows the components of...

Hereís the figure that shows the components of drag in relation to total drag as a function of speed.

...
12-14-21, 08:29 PM
Replies: 69
Views: 2,305
Posted By ofajen

I got my RockHopper about five years ago and for...

I got my RockHopper about five years ago and for the first several years it was a drop bar bike. That was ok, especially with multiple gears and I ran it mostly as a 1x7 with 42 and 12-28.
...
12-14-21, 08:22 PM
Replies: 69
Views: 2,305
Posted By ofajen

Iím the same way. I have two straight bars,...

Iím the same way. I have two straight bars, neither will ever be on one of my bikes. I keep one for extra leverage on hex wrenches like for a stuck garbage disposal. The other is extra, a take off...
12-14-21, 08:10 PM
Replies: 36
Views: 1,109
Posted By ofajen

Yes. And this is a benefit that has been largely...

Yes. And this is a benefit that has been largely lost by the shift to threadless steerer tubes and stiffer modern frames with shorter chain stays, higher BBs and more drop from saddle to stem.
...
12-13-21, 07:35 PM
Replies: 36
Views: 1,109
Posted By ofajen

Actually, I measured 95mm just now, which is what...

Actually, I measured 95mm just now, which is what I kinda thought it was.

Otto
12-13-21, 03:33 PM
Replies: 92
Views: 3,785
Posted By ofajen

Iíve been riding only SS for well over a year. I...

Iíve been riding only SS for well over a year. I stand a lot: climbing, accelerating from slow speed and managing difficult terrain. You are correct, there is an efficiency cost to standing because...
12-12-21, 09:32 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

Yesterday 23 miles. Hills on the way out, and...

Yesterday 23 miles. Hills on the way out, and 20-25 mph headwind on the way back. 45F. Very tiring.

Today I went the other way, mostly gentle slopes and headwind on the way out with tailwind...
12-12-21, 04:49 PM
Replies: 20
Views: 623
Posted By ofajen

This is my winter bike and sees a fair amount of...

This is my winter bike and sees a fair amount of riding in other times of the year. I have SKS mudguards that just slide on and off. The bike has a ďvintage German motorcycleĒ look with the...
12-12-21, 08:22 AM
Replies: 69
Views: 2,305
Posted By ofajen

Thanks! Clearly, I canít criticize anyone for...

Thanks! Clearly, I canít criticize anyone for putting new parts on an old MTB frame!

First I donít like straight bars at all. Also, I didnít want the wide Q factor so I swapped in old road...
12-10-21, 07:50 PM
Replies: 3,523
Views: 260,133
Posted By ofajen

17 miles. It was getting dark and I had the...

17 miles. It was getting dark and I had the light on, then noticed these occasional flashes. Turns out a thunderstorm came up and I managed to get home a little while before things got wild and...
12-10-21, 08:19 AM
Replies: 93
Views: 2,653
Posted By ofajen

I guess I agree about the road riding part. I...

I guess I agree about the road riding part. I mostly gave up road riding in 1993. I still ride on roads but only to connect to the trails I want to ride.

OTOH, at least in our climate, dressing...
12-09-21, 10:04 PM
Replies: 86
Views: 3,230
Posted By ofajen

Here is Tom Anhaltís article from back in 2009...

Here is Tom Anhaltís article from back in 2009 where he describes how higher pressure lowers rolling resistance but at some point ( depending on many factors) increases suspension losses in the rider...
12-09-21, 08:51 PM
Replies: 78
Views: 5,810
Posted By ofajen

Both of my bikes have been single speed for over...

Both of my bikes have been single speed for over a year nowÖ both are mid-80s.

Schwinn Sprint, which would be the candidate if I try out fixed gear. I recently flipped the touring bars to a...
12-09-21, 07:54 PM
Replies: 69
Views: 2,305
Posted By ofajen

That is a great deal! One of my two bikes is a...

That is a great deal! One of my two bikes is a slightly older (late 80s) RockHopper. I got most of a bike for $50 about five years ago. At this point Iíve pretty much rebuilt the bike fron the...
12-09-21, 07:46 PM
Replies: 86
Views: 3,230
Posted By ofajen

This article summarizes a lot of the newer...

This article summarizes a lot of the newer thinking on tire width and pressure. The first paragraph has a link to a good podcast on the topic. This stuff is no longer news.
...
12-07-21, 04:49 PM
Replies: 3,097
Views: 780,328
Posted By ofajen

Hereís my old Schwinn. Two weekends ago I swapped...

Hereís my old Schwinn. Two weekends ago I swapped out the road bars for these touring bars in a moustache bar configuration. Very fun!

...
12-05-21, 05:09 PM
Replies: 499
Views: 72,139
Posted By ofajen

Recently I changed the bar setup on the...

Recently I changed the bar setup on the RockHopper by lowering the touring bars and that is working quite well. The bars are in the normal touring orientation and have a drop of a bit over two inches...
Forum: Road Cycling
11-27-21, 08:23 AM
Replies: 38
Views: 2,333
Posted By ofajen

Yeah, this even applies to pro riders. That...

Yeah, this even applies to pro riders. That podcast Iíve linked a few times where Jan Heine is talking with Jeff Poeetner is very on point. Poertner runs Silca but for many years he ran racing...
Showing results 1 to 50 of 389
 


 
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