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Search: Posts Made By: ofajen
Showing results 1 to 50 of 175
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04-08-21, 04:09 PM
Replies: 48
Views: 1,315
Posted By ofajen

If you have 60 minutes to spare (sorry, I...

If you have 60 minutes to spare (sorry, I initially thought it was shorter) this podcast has an excellent discussion on the topic that features Jan Heine and Josh Poertner who developed wheels and...
04-05-21, 08:39 PM
Replies: 71
Views: 1,121
Posted By ofajen

Mine might as well be the color of trail dust. ...

Mine might as well be the color of trail dust.

On second thought, that would be harder to see where to clean.

I like the metallic blue on my old Schwinn but maybe with not quite so much rust...
04-05-21, 05:00 PM
Replies: 26
Views: 761
Posted By ofajen

In the winter, I rinse off the mud and crud from...

In the winter, I rinse off the mud and crud from the bottom bracket area with water sprayed from my water bottle. Now that itís not so muddy, I usually just clean the dust and splatter with a brush...
03-26-21, 12:48 PM
Replies: 52
Views: 1,945
Posted By ofajen

Thatís crazy talk! Never gonna happen. I was...

Thatís crazy talk! Never gonna happen. I was thinking of going back to solid rubber tires. 😊

Otto
03-20-21, 01:42 PM
Replies: 37
Views: 868
Posted By ofajen

I find that riding single speed really helps with...

I find that riding single speed really helps with the suffering part. 😊

Hills and headwinds become a sort of existential challenge that force you to repeatedly work at higher output levels. The...
03-16-21, 07:53 PM
Replies: 2,436
Views: 163,084
Posted By ofajen

17 yesterday and 23 today. Both days cold, damp,...

17 yesterday and 23 today. Both days cold, damp, cloudy and windy. Had to sneak all the rides this last week in between episodes of rain. Glad to have the new clip on fenders on the old Schwinn!
...
03-16-21, 09:51 AM
Replies: 67
Views: 2,143
Posted By ofajen

You can always replace wheels. Or, if you can...

You can always replace wheels. Or, if you can find rims with the same ERD, you can replace them forty years from now with a simple rim transfer and not even have to re-lace the wheel. Though rim...
03-13-21, 11:07 PM
Replies: 2,436
Views: 163,084
Posted By ofajen

Hmmm. I did a tad under 32 miles today in 50F,...

Hmmm. I did a tad under 32 miles today in 50F, cloudy, damp and strong headwinds all the way back home after I did a hard pace to get to midway. Fairly brutal in the wind on a single speed. Still...
03-11-21, 08:03 AM
Replies: 98
Views: 3,707
Posted By ofajen

Just for fun, I used my weight of 175 lbs as an...

Just for fun, I used my weight of 175 lbs as an example and tried to estimate the difference 9 lbs of bike weight would make in a couple of my typical riding situations.

omnicalculator.com says...
03-06-21, 06:35 PM
Replies: 24
Views: 1,119
Posted By ofajen

How about you use your 38t chaining with the 19...

How about you use your 38t chaining with the 19 for about 55 gear inches? If you remove one chain link, you should be pretty close to the same spot on the dropout as you are with 42/19. Or run...
02-26-21, 05:43 PM
Replies: 2,436
Views: 163,084
Posted By ofajen

17 miles! First time outside in several weeks...

17 miles! First time outside in several weeks due to ice, snow and bitter cold. Felt like a lot more than 17 due to the soft mud. Still very therapeutic! 😊

Otto
02-21-21, 04:29 PM
Replies: 79
Views: 3,196
Posted By ofajen

Well, it would certainly be a waste for me to...

Well, it would certainly be a waste for me to ride a pretty bike. At the end of each ride it would be a pretty hike covered with either dust or mud. OTOH, that looks like it should be out somewhere...
02-21-21, 09:23 AM
Replies: 10
Views: 398
Posted By ofajen

It will depend on the pedals you are going to...

It will depend on the pedals you are going to use, as well. I benched my nice 70s road frame when I started using big platform pedals, because of pedal strike. I moved the parts over to a cheap 80s...
02-18-21, 07:43 PM
Replies: 27
Views: 859
Posted By ofajen

Just glad to see that ďnoĒ is winning. Otto

Just glad to see that ďnoĒ is winning.

Otto
02-15-21, 12:34 PM
Replies: 165
Views: 7,258
Posted By ofajen

Actually itís not a difference in taste or...

Actually itís not a difference in taste or preference or even a lack of intelligence. Iím willfully avoiding newer bike technologies just to be naughty. :)

Otto
02-15-21, 11:42 AM
Replies: 165
Views: 7,258
Posted By ofajen

Call it a ďslickyĒ.

Call it a ďslickyĒ.
02-15-21, 10:16 AM
Replies: 165
Views: 7,258
Posted By ofajen

Eliminating the derailleur is easy. Otto

Eliminating the derailleur is easy.

Otto
02-13-21, 05:16 PM
Replies: 180
Views: 10,519
Posted By ofajen

I used to love to hate those. Otto

I used to love to hate those.

Otto
02-13-21, 05:14 PM
Replies: 180
Views: 10,519
Posted By ofajen

Yeah, the JC Penney bike was a welded steel...

Yeah, the JC Penney bike was a welded steel frame, single piece steel cranks, steel rims, etc. So definitely heavy but also built to be ridden. Canít recall, I assume I gave it away, because I...
02-13-21, 05:05 PM
Replies: 1
Views: 233
Posted By ofajen

Looks like the SKS Mudrocker will be an option. ...

Looks like the SKS Mudrocker will be an option. SKS lists availability as 2nd quarter of 2021, so fairly soon...

You can find both rear and front fenders here:
...
02-13-21, 12:14 PM
Replies: 55
Views: 2,610
Posted By ofajen

Iíd agree. Itís hard to deal with any situation...

Iíd agree. Itís hard to deal with any situation where real work is needed if you are bolt upright. Even 10 or 15 degrees forward really lets you engage your core and arms and work hard if you need to...
02-13-21, 11:32 AM
Replies: 99
Views: 3,830
Posted By ofajen

That hasnít been my experience with frames from...

That hasnít been my experience with frames from the 70s and 80s. Iíve been able to build up the bikes the way I wanted cheaply and easily. Indeed, people just about give away decent 26Ē wheels...
02-09-21, 10:06 PM
Replies: 67
Views: 3,567
Posted By ofajen

Coincidentally, that was the average daily ride...

Coincidentally, that was the average daily ride when Mark Beaumont did the first cycling circumnavigation in under 80 days. Yikes!

And Iím equally impressed by Jenny Grahamís unsupported record of...
02-07-21, 11:14 AM
Replies: 99
Views: 3,830
Posted By ofajen

Iím always the last to know. I was going to...

Iím always the last to know. I was going to suggest that as an option. I have a Schwinn Sprint from the mid 80s running SS with touring bars. Great for just enjoying the ride. Lots of miles on it...
02-05-21, 11:20 PM
Replies: 2,436
Views: 163,084
Posted By ofajen

23 cold, slow, muddy, windy miles. Delightful! ...

23 cold, slow, muddy, windy miles. Delightful!

Otto
01-24-21, 09:32 AM
Replies: 85
Views: 2,912
Posted By ofajen

You know I used to be more grumpy about winter...

You know I used to be more grumpy about winter riding. I just did as much as I could stand because Iím not a big fan of indoor trainers.

This winter Iíve started to notice lots of little things...
01-21-21, 08:12 PM
Replies: 471
Views: 88,641
Posted By ofajen

It was a balmy 52F today so I went on the...

It was a balmy 52F today so I went on the city/county trail toward the river. Nearly half the trail was muddy, some with standing water. Iím developing a taste for riding on that slippery stuff. ...
01-21-21, 04:25 PM
Replies: 2,436
Views: 163,084
Posted By ofajen

15 miles. It was up in the low 50s today so the...

15 miles. It was up in the low 50s today so the trails are soggy. My bike and I both turned the glorious color of mud splatter. :)

...
01-02-21, 12:30 PM
Replies: 19
Views: 1,079
Posted By ofajen

First things first. Why do you want to do this?...

First things first. Why do you want to do this? That is, for what riding purpose? It will inevitably be a lot of time, trouble and expense to do all this, so you probably want some clarity on what...
01-01-21, 10:19 AM
Replies: 19
Views: 1,136
Posted By ofajen

Not that crazy, I think. Trail is the horizontal...

Not that crazy, I think. Trail is the horizontal distance from where the front wheel touches the ground to where the steering axis intersects the ground. Itís positive if the ground contact point is...
12-20-20, 09:34 AM
Replies: 471
Views: 88,641
Posted By ofajen

Itís not a rumor, the new SS will be called the...

Itís not a rumor, the new SS will be called the Roaduno. Itís been mentioned in the last two Rivbike emails. Not even on the production schedule yet, though. It will take up to 42mm wide tires.
...
12-12-20, 02:43 PM
Replies: 36
Views: 1,723
Posted By ofajen

I have the same experience with straight bars....

I have the same experience with straight bars. Useless as a handlebar, but I use a steel one as a tool: it provides a bit of extra leverage on hex wrenches, when needed.

I have swept bars on both...
11-25-20, 10:54 PM
Replies: 66
Views: 4,438
Posted By ofajen

Oops! Thanks! I meant to link this one... ...

Oops! Thanks! I meant to link this one...

https://www.bikeforums.net/classic-vintage/1127647-vintage-mtb-upright-bar-urban-bike-conversions.html

I was thinking of a vintage MTB like my...
11-25-20, 09:41 PM
Replies: 66
Views: 4,438
Posted By ofajen

You might check out some of the bikes in this...

You might check out some of the bikes in this thread. A vintage MTB with comfy bars is a lot of fun on smooth trails and gravel roads. Might not be expensive enough for you though.
...
11-25-20, 10:59 AM
Replies: 151
Views: 6,026
Posted By ofajen

Perhaps. But there may be a lot more to cadence...

Perhaps. But there may be a lot more to cadence in cycling. For example, you might want to read this article by Tom Danielson.
...
11-16-20, 08:30 AM
Replies: 33
Views: 1,229
Posted By ofajen

No. No point in insurance on our old bikes. ...

No. No point in insurance on our old bikes.

Otto
11-08-20, 05:24 PM
Replies: 37
Views: 1,864
Posted By ofajen

Actually I can pick two that are all three: SS...

Actually I can pick two that are all three: SS and fixed gear. 😊

Otto
11-01-20, 09:41 AM
Replies: 278
Views: 9,165
Posted By ofajen

I took rather a lot of physics back in college in...

I took rather a lot of physics back in college in the 80s, but Iíve made almost a full recovery from the trauma! I did publish a couple of minor articles in condensed matter physics while in grad...
10-31-20, 08:31 PM
Replies: 278
Views: 9,165
Posted By ofajen

Iíve made a change of that type recently by...

Iíve made a change of that type recently by changing from drop bars to touring bars. Now on the MTB, it was firstly because the greater wheel flop meant that handling was a bit sketchy with drop...
10-31-20, 07:58 PM
Replies: 278
Views: 9,165
Posted By ofajen

Yup, cubewheels, tomatocoupe, Jobst Brandt...

Yup, cubewheels, tomatocoupe, Jobst Brandt (posthumously), omniwattcalculator, coupeís published textbook and I are conspiring to mislead the good readers here that the power requirement in a...
10-31-20, 10:30 AM
Replies: 278
Views: 9,165
Posted By ofajen

One last try: yes, the force is the same. The...

One last try: yes, the force is the same. The power requirement is the dot product of force and rider speed. So the power requirements are not the same.

If I straddle the bike and stand in a 60...
10-30-20, 12:22 PM
Replies: 278
Views: 9,165
Posted By ofajen

As noted in the equation I gave, drag (the...

As noted in the equation I gave, drag (the product of k, A and v**2) is proportional to the square of relative wind-speed, v, while power is the product of the inline portion of that drag and rider...
10-30-20, 08:32 AM
Replies: 278
Views: 9,165
Posted By ofajen

That link doesnít work for me, but the result is...

That link doesnít work for me, but the result is correct.

The air drag component of cycling work is k(a)*A*v**2*s, where s is the bicycle speed on the road, k(a) is the air resistance coefficient,...
10-29-20, 10:41 AM
Replies: 278
Views: 9,165
Posted By ofajen

I think we decided that cycling is a poor form of...

I think we decided that cycling is a poor form of exercise anyway, so why bother with a heavy bike? 😊

Otto
10-28-20, 07:09 PM
Replies: 22
Views: 929
Posted By ofajen

I have that setup on my Schwinn and it works...

I have that setup on my Schwinn and it works fine. Iím running a cheap 1/8Ē freewheel and 3/32Ē road chainring, so I have to have the 1/8Ē chain.

Interestingly, the high end freewheels from...
10-27-20, 06:52 PM
Replies: 33
Views: 1,950
Posted By ofajen

Iíd be careful about changing the fore-aft saddle...

Iíd be careful about changing the fore-aft saddle position much. That really comes first and then you choose a stem to get the reach right. OTOH, do expect to get a much longer stem if you switch to...
10-26-20, 09:13 PM
Replies: 20
Views: 2,985
Posted By ofajen

Sorry that I canít comment on 650B but I do have...

Sorry that I canít comment on 650B but I do have 700C and 26er, both running SS.

I have 700x32 on the Schwinn. The other bike is a 26er (88 RockHopper). With smooth tires (26x2.0) it is maybe 1/2...
10-24-20, 08:36 AM
Replies: 33
Views: 1,950
Posted By ofajen

Hereís the view down the steering axis on my...

Hereís the view down the steering axis on my vintage MTB with swept back touring bars (Sunlite Elson Roadster):

...
10-23-20, 07:02 PM
Replies: 5
Views: 1,071
Posted By ofajen

Iíd agree that the Jones bar has a lot going for...

Iíd agree that the Jones bar has a lot going for it. Iím using the knockoff version of the Nitto Albatross from Sunlite as a narrower, even more swept alternative to the Jones bar.

With a really...
10-23-20, 08:57 AM
Replies: 18
Views: 733
Posted By ofajen

Back in the day, I had the version with the metal...

Back in the day, I had the version with the metal Campy head. I ran it along the seat tube with the head down at the down tube-BB joint. Very handy to pull out and use to defend against dogs that...
Showing results 1 to 50 of 175
 


 
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