Search: Posts Made By: oldacura
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06-11-19, 02:33 PM
Replies: 10
Views: 942
Posted By oldacura

If the top tube chips are minor, you can likely...

If the top tube chips are minor, you can likely get some touch-up paint from Santana. Then, you get some clear bra (3M Scotchcal) from Amazon or the like to protect the paint from future damage. Nice...
06-04-19, 07:51 AM
Replies: 1
Views: 855
Posted By oldacura

We had a flat Sunday. First time in a while. I...

We had a flat Sunday. First time in a while. I forgot how much I don't like removing & installing a new tube, seating the bead and re-inflating the tire. I have used Slime tubes recently but they are...
06-04-19, 06:49 AM
Replies: 1
Views: 855
Posted By oldacura

Vittoria Pit Stop

Has anyone here used this on a tandem:

https://www.youtube.com/watch?v=4GoA9v6ZR0c

I had never heard of it. A neighbor mentioned it to me. Seems like it might be a easier way to fix a flat on...
03-19-19, 09:54 AM
Replies: 17
Views: 3,550
Posted By oldacura

I appreciate all of the well-reasoned and...

I appreciate all of the well-reasoned and carefully thought out advice available on this forum.

When we got our new Calfee several years ago, I wanted a wide range. We went with a Di2 double...
02-28-19, 01:28 PM
Replies: 4
Views: 1,170
Posted By oldacura

If you like Mt Lemmon, you'l probably also like...

If you like Mt Lemmon, you'l probably also like Kitt Peak (SW of Tucson). The ride up & down is great. The ride out & back - not so much.
01-31-19, 08:16 AM
Replies: 28
Views: 4,272
Posted By oldacura

Looks like area around Tucson.

Looks like area around Tucson.
01-22-19, 09:41 AM
Replies: 10
Views: 1,664
Posted By oldacura

I appreciate all the info. However, there seems...

I appreciate all the info. However, there seems to be a big disconnect between the wonderful experience of bike touring of NZ that so many have reported and the picture conspiratemus1 paints. His...
01-21-19, 01:57 PM
Replies: 10
Views: 1,664
Posted By oldacura

Wow! I'm glad that I inquired. This is completely...

Wow! I'm glad that I inquired. This is completely different from my expectation. My personal experience is more than 30 years old.

In 1988, we took an extended vacation from the US to NZ. We flew...
01-08-19, 09:17 AM
Replies: 10
Views: 1,664
Posted By oldacura

New Zealand South Island bike tour

My Stoker & I have often thought about riding a tandem in New Zealand. However, we never got around to it and in the meantime, we have gotten older. We would still like to do a bike tour on the South...
01-03-19, 01:19 PM
Replies: 40
Views: 3,550
Posted By oldacura

This has been discussed on this forum...

This has been discussed on this forum extensively.

A tandem has an advantage over a single bike on flats & downhill. This is an aerodynamic advantage. Basically, anything over about 15 mph a...
01-02-19, 10:48 AM
Replies: 40
Views: 3,550
Posted By oldacura

I think that I didn't make myself clear. If one...

I think that I didn't make myself clear. If one is riding SINGLE bikes with another rider of different ability, it isn't much fun for either. A tandem eliminates that difference.
01-02-19, 09:33 AM
Replies: 40
Views: 3,550
Posted By oldacura

Agreed. Over many years of cycling, I have found...

Agreed. Over many years of cycling, I have found that riding with another person who is even slightly different in ability isn't much fun for either the faster or the slower person.

However,...
01-02-19, 09:29 AM
Replies: 7
Views: 1,196
Posted By oldacura

So - slightly heavier than a good derailleur...

So - slightly heavier than a good derailleur system? Also - I thought there was a slight efficiency loss compared to a derailleur - correct?

Sounds very intriguing. I too like the appeal of a...
12-21-18, 10:31 AM
Replies: 7
Views: 1,196
Posted By oldacura

I'd be interested in how you like the Rohloff...

I'd be interested in how you like the Rohloff compared to derailleurs once you get some miles on it. What is the gear range? How many gears?
12-12-18, 09:47 AM
Replies: 19
Views: 1,945
Posted By oldacura

I looked at their website. From a quick view I...

I looked at their website. From a quick view I gather that the function of this is to replace mechanical shifting with a motor. Like Sram or Di2 (but wireless). Correct?

If one can afford a...
10-29-18, 07:08 AM
Replies: 34
Views: 7,157
Posted By oldacura

We got one from Co-Motion. The bag under our...

We got one from Co-Motion. The bag under our Stoker seat was bothering her. The Co-Motion one that fits under the stoker bars is out of the way for both of us. Quite a bit bigger than the under seat...
10-10-18, 02:24 PM
Replies: 4
Views: 598
Posted By oldacura

Frank & Kaye live part time in Tucson and would...

Frank & Kaye live part time in Tucson and would have lots of info on riding there. Look for them on this forum.

I used to live in Tucson as well but never rode a tandem there. Mt Lemmon is a...
09-18-18, 07:00 AM
Replies: 98
Views: 8,981
Posted By oldacura

Different question: Why does your bike have only...

Different question: Why does your bike have only 2 couplers? Breaking it into 2 pieces wouldn't make it small enough to fit into maximum size airline cases - would it?
09-14-18, 08:12 AM
Replies: 35
Views: 1,809
Posted By oldacura

I haven't run the numbers (like others have) but...

I haven't run the numbers (like others have) but I would think the biggest jump would be the 11t - 10t jump. That would be only about 9%. Are there other jumps that are in the 15% range?

I now see...
09-14-18, 07:51 AM
Replies: 3
Views: 650
Posted By oldacura

Wow! Gorgeous! I'll bet that was a lot of...

Wow! Gorgeous!

I'll bet that was a lot of up & down.
09-13-18, 11:59 AM
Replies: 35
Views: 1,809
Posted By oldacura

Very interesting analysis. I don't think in...

Very interesting analysis. I don't think in gear-inches (rather ratios) but I know gear-inches is the common language for detailed analysis.

Our old Co-Mo was a triple with a low end of 30t x...
09-12-18, 09:59 AM
Replies: 35
Views: 1,809
Posted By oldacura

I would think that a progressive range from high...

I would think that a progressive range from high to low without a big step in the middle has some real advantages. Relatively large steps between gears may be objectionable to some but OK for others....
09-11-18, 02:00 PM
Replies: 35
Views: 1,809
Posted By oldacura

Never thought of the weight of a huge cassette...

Never thought of the weight of a huge cassette but it is probably quite a lot. With respect to the aesthetics, I agree - the huge cassette looks pretty weird (but I could get used to it).

Our...
09-11-18, 01:15 PM
Replies: 35
Views: 1,809
Posted By oldacura

Merlin - If you were to change to a 1x,...

Merlin -

If you were to change to a 1x, you could have a close-ratio cassette for Florida and a wide range cassette when you go to hilly terrain. Do you see having a 1x drivetrain a benefit or...
09-07-18, 08:26 AM
Replies: 35
Views: 1,809
Posted By oldacura

Our new tandem is 2x11 with a range of 5.6:1....

Our new tandem is 2x11 with a range of 5.6:1. This was about the widest range we could get in a 2x Di2. If we avoid big climbs, this works well enough for us.

Others on this forum are happy...
09-06-18, 01:21 PM
Replies: 35
Views: 1,809
Posted By oldacura

Sram Eagle for tandems

Has anyone tried to integrate a Sram Eagle system to a tandem?

My understanding is that it is a 1 x 12 with a range of 10t - 50t.

It seems like this would solve a lot of range problems and...
08-31-18, 10:52 AM
Replies: 25
Views: 1,174
Posted By oldacura

Ok - thanks. I don't see how watts compare to...

Ok - thanks. I don't see how watts compare to knots but unless I can provide evidence otherwise, I will accept that this is the best authority available.

I see that the aero drag is about 30...
08-31-18, 09:33 AM
Replies: 25
Views: 1,174
Posted By oldacura

You appear to be an intelligent person. I don't...

You appear to be an intelligent person. I don't know why you feel the need to get unpleasant.

If you look at the Swisside website noted by OneIsAllYouNeed, they claim rotational drag constitutes...
08-31-18, 09:13 AM
Replies: 25
Views: 1,174
Posted By oldacura

Cyclists are willing to spend lots to save ounces...

Cyclists are willing to spend lots to save ounces and grams. At speeds above 20 mph wind drag is more important than weight. If rotational drag constitutes 25% of the drag on a wheel, it is not...
08-30-18, 02:03 PM
Replies: 25
Views: 1,174
Posted By oldacura

Thanks - that is similar to what I was looking...

Thanks - that is similar to what I was looking for. This article states that the rotational drag on a wheel is 25% - 30% of total drag. The rest, I assume (70% - 75%) is translating the wheel...
08-30-18, 07:29 AM
Replies: 25
Views: 1,174
Posted By oldacura

Yes - but drivetrain losses are either constant...

Yes - but drivetrain losses are either constant or linearly proportional to speed. Aero losses are proportional to the cube of the speed.

I've not ridden rollers much but doesn't the power one...
08-30-18, 06:33 AM
Replies: 25
Views: 1,174
Posted By oldacura

I can see how bladed spokes would be more...

I can see how bladed spokes would be more aerodynamic than round (even if a very small difference). However, most bladed spokes are round near the rim and the nipples are round. The greatest drag of...
08-29-18, 08:40 AM
Replies: 25
Views: 1,174
Posted By oldacura

Here is the closest thing I could find on a web...

Here is the closest thing I could find on a web search:

https://www.youtube.com/watch?v=YfPRu6APOhg

This guy is thinking about the effect in the same way that I am. (Lots of singing birds...
08-29-18, 07:12 AM
Replies: 25
Views: 1,174
Posted By oldacura

The aeroweenie link is similar to what I was...

The aeroweenie link is similar to what I was looking for but as reburns states, this would not be a difficult experiment to set up. It could be normalized to sea level.

The power to move a bike...
08-28-18, 01:20 PM
Replies: 25
Views: 1,174
Posted By oldacura

I'm not interested in rolling resistance or...

I'm not interested in rolling resistance or weight.

I'm looking for empirical results of the amount of power (watts) consumed by a spinning bike wheel.
08-28-18, 11:07 AM
Replies: 25
Views: 1,174
Posted By oldacura

Aero wheels

Not really a tandem specific topic but again - since all the smart people are here I thought I'd ask:

Is there a study where someone has measured the amount of power dissipated by any given...
08-16-18, 12:07 PM
Replies: 34
Views: 2,059
Posted By oldacura

I think Calfee can meet your goals. Mel at...

I think Calfee can meet your goals. Mel at Tandems East in New Jersey is a good source of info and an interface to Calfee.
08-15-18, 09:03 AM
Replies: 34
Views: 1,641
Posted By oldacura

Ok - so if you don't want to hang your bike by...

Ok - so if you don't want to hang your bike by the wheels, you can still use the bike lift to hang it by the captain's bars and the stoker's seat.
08-14-18, 03:27 PM
Replies: 34
Views: 1,641
Posted By oldacura

If your rims bend under a 24 pound load, there is...

If your rims bend under a 24 pound load, there is really something wrong.

Think about how much force is on your rims when the two of you hit a pothole at 40mph. If they don't bend with that much...
08-14-18, 11:23 AM
Replies: 34
Views: 1,641
Posted By oldacura

Yes - I have used several "bike lifts" (I think...

Yes - I have used several "bike lifts" (I think that is the brand name). I think that I ordered the last one from Amazon.

They work very well. I have it mounted to an 8' long 2x4 that is mounted...
08-10-18, 09:17 AM
Replies: 98
Views: 8,981
Posted By oldacura

I have to plead ignorance here. Our Calfee Tetra...

I have to plead ignorance here. Our Calfee Tetra has round tubes. Where a tube has a junction with another tube, the junction is wrapped with a smooth wrap. If there is a lug, it is not visible from...
08-09-18, 03:04 PM
Replies: 98
Views: 8,981
Posted By oldacura

I won't claim to know much about carbon fiber...

I won't claim to know much about carbon fiber construction. However, it seems a bit counter-productive to add layers, wraps, gussets, etc. to compensate for a frame with fundamentally inadequate...
08-08-18, 09:13 AM
Replies: 98
Views: 8,981
Posted By oldacura

I also think this is an example of the evolution...

I also think this is an example of the evolution of bike frames in general (both single & tandem). The traditional old school diamond frame had evolved based on round steel tubing for a reason. The...
08-06-18, 02:42 PM
Replies: 98
Views: 8,981
Posted By oldacura

Interesting analysis. Based on the OPs...

Interesting analysis. Based on the OPs description of flex & shifting, I assumed that there must be something wrong (i.e. broken) with the frame. When I see the photos, that is a long, short frame....
08-02-18, 06:59 AM
Replies: 98
Views: 8,981
Posted By oldacura

Agreed. I too appreciate Consumer Reports and the...

Agreed. I too appreciate Consumer Reports and the work they do but this has nothing to do with free speech. The OP has every right to say what he wants, it just appears that he has chosen not to. The...
07-31-18, 06:48 AM
Replies: 29
Views: 1,768
Posted By oldacura

I've tried handlebar mounted mirrors and found...

I've tried handlebar mounted mirrors and found that I can't reliably discern what is going on behind. I've never tried an electronic rear-sensing device.

I do use an eyeglass mounted mirror...
07-26-18, 01:28 PM
Replies: 98
Views: 8,981
Posted By oldacura

I think that you are taking an agreement between...

I think that you are taking an agreement between a consumer, a manufacturer and a retailer and generalizing it into "what is wrong with this world".

I'm curious about what is going on with the...
07-24-18, 06:52 AM
Replies: 14
Views: 1,336
Posted By oldacura

It has been some time but in the past we have...

It has been some time but in the past we have used Priceline to book a rental car. They have a feature where you can select the type of vehicle from about 6 different suppliers and bid on what you...
07-23-18, 01:09 PM
Replies: 98
Views: 8,981
Posted By oldacura

Broken axle?

Broken axle?
07-23-18, 08:36 AM
Replies: 98
Views: 8,981
Posted By oldacura

I was thinking the same. The shifting issues are...

I was thinking the same. The shifting issues are likely a symptom of the flex. It sounds like there is something wrong with your frame. Is it cracked somewhere? That kind of flex is not inherent to a...
Showing results 1 to 50 of 991
 


 
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