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Search: Posts Made By: rahill
Showing results 1 to 50 of 65
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Forum: Tandem Cycling
04-15-22, 09:16 AM
Replies: 32
Views: 7,129
Posted By rahill

The current standard for hookless rims is...

The current standard for hookless rims is remarkably un-conservative. "standard ISO4210 part 2, “edition 2015” – the tire must not blow out during a 5-minute test when inflated at 110 percent of the...
Forum: Tandem Cycling
03-01-21, 11:16 AM
Replies: 29
Views: 13,518
Posted By rahill

Here's ours, it's a Speedster and has a basically...

Here's ours, it's a Speedster and has a basically standard fade.


https://cimg7.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/img_1017_284fb7fe5a99babe515f34ac8cf4b024898a8d65.jpg
Forum: Tandem Cycling
03-13-19, 09:39 AM
Replies: 38
Views: 15,052
Posted By rahill

I understand the thought about mounting weight...

I understand the thought about mounting weight lower down on the front panniers, but on a tandem - as you said - the weight distribution is different than the 40/60 of a single. In addition, the...
Forum: Tandem Cycling
03-11-19, 10:25 AM
Replies: 38
Views: 15,052
Posted By rahill

We have toured a little with two sets of Ortlieb...

We have toured a little with two sets of Ortlieb rear panniers (so yes, front and rear the same size). We ride in California so our baggage requirements may be lower (we're not carrying a lot of rain...
Forum: Folding Bikes
10-24-18, 02:43 PM
Replies: 11
Views: 10,320
Posted By rahill

Typo (or thinko I guess) - edited to 62". The...

Typo (or thinko I guess) - edited to 62". The B&W case is more than 62" which is one thing that made me apprehensive about it and more comfortable about the Stryde (I physically measured both to...
Forum: Folding Bikes
10-24-18, 08:39 AM
Replies: 11
Views: 10,320
Posted By rahill

Long Journey

It has to be the Long Journey - basically you want the biggest thing you can get that still meets the airline limits (length + width + depth = 62" or less).
...
Forum: Folding Bikes
10-23-18, 02:00 PM
Replies: 11
Views: 10,320
Posted By rahill

Cardboard box?

I guess a cardboard box (and another to get home) would be better in that case...
Forum: Folding Bikes
10-23-18, 10:25 AM
Replies: 11
Views: 10,320
Posted By rahill

Brompton + Samsonite Stryde

I think this has been mentioned before, but the Samsonite Stryde Long Journey seems to be a good choice for airline travel with a Brompton. We just got back from a trip to Ireland and Northern...
Forum: Tandem Cycling
03-16-18, 09:27 AM
Replies: 42
Views: 10,693
Posted By rahill

The gearing you have is stock Speedster before...

The gearing you have is stock Speedster before Co-Motion recently switched to the double chainring. Check the derailleur to make sure it'll handle a wider gear range before switching anything. The...
Forum: Tandem Cycling
12-13-17, 10:07 AM
Replies: 11
Views: 2,251
Posted By rahill

This may be one of the most important unmentioned...

This may be one of the most important unmentioned details about packing a bike. We kinked our rear derailleur cable on our last trip and spent the whole trip trying to figure out a good way to shift...
Forum: Tandem Cycling
09-28-17, 10:49 AM
Replies: 8
Views: 2,769
Posted By rahill

Bicycle Outfitter in Los Altos is a Co-Motion...

Bicycle Outfitter in Los Altos is a Co-Motion dealer and usually has a lot in stock for test rides. Cupertino Bikes would be worth a call for Santana.
Forum: Tandem Cycling
08-17-17, 12:34 PM
Replies: 1,509
Views: 669,137
Posted By rahill

Our first fully loaded tandem camping trip - 4...

Our first fully loaded tandem camping trip - 4 days of cycling to/through/from Lassen National Park.
Forum: Tandem Cycling
09-26-16, 08:58 AM
Replies: 18
Views: 3,456
Posted By rahill

You can replace the QR with a Yakima (or anyone...

You can replace the QR with a Yakima (or anyone else's) locking QR - that's what we use on ours.
Forum: Tandem Cycling
09-23-16, 08:35 AM
Replies: 18
Views: 3,456
Posted By rahill

We use the Rockymounts R4 on our Subaru. The...

We use the Rockymounts R4 on our Subaru. The ability to easily extend and retract the boom is great, allowing us to easily open the back of the car when the tandem is not on the roof. There's a...
Forum: Tandem Cycling
08-19-16, 11:25 AM
Replies: 444
Views: 145,046
Posted By rahill

I've found the pad adjusters on each side of the...

I've found the pad adjusters on each side of the Spyre caliper to back out during use, which is not exactly ideal. I'd welcome any solutions to stop that happening. Loctite isn't really viable...
Forum: Tandem Cycling
11-23-15, 11:18 AM
Replies: 59
Views: 12,110
Posted By rahill

We have a Specialized CG-R on our Co-Motion...

We have a Specialized CG-R on our Co-Motion Speedster. We rode without it for some time but there were still a few times, especially on rougher roads, when it was clear that a little relief would be...
Forum: Tandem Cycling
11-09-15, 05:41 PM
Replies: 18
Views: 11,731
Posted By rahill

There are 44 g per mole of CO2 and a mole of gas...

There are 44 g per mole of CO2 and a mole of gas displaces 22.4 liters at standard temperature and pressure. So, a 16g CO2 cartridge contains 16/44 mole or 8.14 liters. The volume of a 32 mm tire...
Forum: Tandem Cycling
11-05-15, 01:16 PM
Replies: 6
Views: 1,890
Posted By rahill

Absolutely, it's clear he's just going from the...

Absolutely, it's clear he's just going from the picture (well, that and previous experience with Di2, but not this particular setup).
Forum: Tandem Cycling
11-04-15, 05:47 PM
Replies: 6
Views: 1,890
Posted By rahill

Lennard Zinn seems skeptical -- see about half...

Lennard Zinn seems skeptical -- see about half way down under "Shifting Performance":

Technical FAQ: Shifting Issues, gear combos, and more - VeloNews.com...
Forum: Tandem Cycling
07-24-15, 09:08 AM
Replies: 42
Views: 8,046
Posted By rahill

And that's going to work with your existing...

And that's going to work with your existing Athena derailleur? 36 is wayyyyyy more than the quoted max for that derailleur (29T).

Cross your fingers!
...
Forum: Tandem Cycling
09-25-14, 03:29 PM
Replies: 10
Views: 2,474
Posted By rahill

Co-Motion recently (like yesterday) updated their...

Co-Motion recently (like yesterday) updated their website. I don't think they have any tandems left with lateral tubes. Not sure what to think of this, since we own a 1-year old Speedster with a...
Forum: Tandem Cycling
07-30-14, 10:38 AM
Replies: 16
Views: 1,979
Posted By rahill

Lennard Zinn has stated on Velonews several times...

Lennard Zinn has stated on Velonews several times that the cassette spacing is identical (http://velonews.competitor.com/2013/09/bikes-and-tech/drivetrain-compatibility-hidden-in-plain-sight_303199)...
Forum: Tandem Cycling
07-03-14, 12:26 PM
Replies: 16
Views: 2,282
Posted By rahill

Except for the bit that refers to: "Adjustable...

Except for the bit that refers to: "Adjustable permanent magnet (http://en.wikipedia.org/wiki/Permanent_magnet) eddy current brake"

In any case, I wasn't suggesting it was or wasn't practical,...
Forum: Tandem Cycling
07-03-14, 10:54 AM
Replies: 16
Views: 2,282
Posted By rahill

Yes, aluminum - or something else...

Yes, aluminum - or something else non-ferromagnetic (e.g., copper).

Eddy current brake - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Eddy_current_brake)
Forum: Tandem Cycling
07-02-14, 04:37 PM
Replies: 149
Views: 31,835
Posted By rahill

So much for the blanket statement that "wider...

So much for the blanket statement that "wider tires have lower rolling resistance"

I also question the methodology of using the same pressure in all tires, regardless of size. I suppose this...
Forum: Tandem Cycling
05-27-14, 09:52 AM
Replies: 24
Views: 2,304
Posted By rahill

Not on the tandem but I do have a GoPro (forward...

Not on the tandem but I do have a GoPro (forward looking) on my single bike for my daily commute. The GoPro is great, the handlebar mount is too fragile and will break from normal road vibrations. ...
Forum: Tandem Cycling
03-14-14, 03:28 PM
Replies: 444
Views: 145,046
Posted By rahill

That looks like the original recall. The...

That looks like the original recall. The replacements have been available since the beginning of the year.
Forum: Tandem Cycling
03-03-14, 03:38 PM
Replies: 97
Views: 31,640
Posted By rahill

This is really amazing - I pinch flatted a front...

This is really amazing - I pinch flatted a front tire on my single bike a couple of weeks ago (on a descent, in the dark, with cars following) -- 23mm Gatorskin, 110 psi. Not the first time I've...
Forum: Tandem Cycling
02-28-14, 10:20 AM
Replies: 26
Views: 3,508
Posted By rahill

To be fair, none of us really need to be riding...

To be fair, none of us really need to be riding Dura Ace, Record, Red, whatever on our carbon bikes. We upgrade because we want nice stuff not because of any necessary performance benefits (for the...
Forum: Tandem Cycling
02-27-14, 09:59 AM
Replies: 37
Views: 4,961
Posted By rahill

How do you figure that swept area increases with...

How do you figure that swept area increases with radius squared? If the disc was a plate, sure the area of that plate increases with radius squared, but it's not. The size of the pad remains the...
Forum: Tandem Cycling
02-26-14, 09:12 PM
Replies: 26
Views: 3,508
Posted By rahill

I think you'd be surprised how little difference...

I think you'd be surprised how little difference shaving weight off will make. Find a calculator that let's you enter grade, power, weight, etc. and run some numbers to check for yourself - here's...
Forum: Tandem Cycling
02-26-14, 08:13 PM
Replies: 37
Views: 4,961
Posted By rahill

Swept area increases linearly with radius,...

Swept area increases linearly with radius, assuming the width of the disc remains constant. Mass, neglecting the spindly disc arms, would also increase linearly, assuming constant thickness. The...
Forum: Tandem Cycling
02-04-14, 11:41 AM
Replies: 14
Views: 3,368
Posted By rahill

Yup, that's what Speedplay recommends (and I've...

Yup, that's what Speedplay recommends (and I've been using for years) too.
Forum: Tandem Cycling
02-04-14, 09:33 AM
Replies: 14
Views: 3,368
Posted By rahill

The Speedplay recommendation is something like...

The Speedplay recommendation is something like 2,000 miles. On the new ones, that's trivial with the grease port on the end cap. On my older ones (X/2), you have to pry off the end cap and fit an...
Forum: Tandem Cycling
12-26-13, 11:52 AM
Replies: 444
Views: 145,046
Posted By rahill

The cable clamp on the SLC is/was a torx while on...

The cable clamp on the SLC is/was a torx while on the standard Spyre that bolt is/was a standard hex bolt. I believe the pad adjust screw, hidden inside the larger torx fastener, was a 3mm hex on...
Forum: Tandem Cycling
10-31-13, 07:06 PM
Replies: 129
Views: 29,450
Posted By rahill

I don't necessarily believe in the knee over...

I don't necessarily believe in the knee over pedal spindle "myth" but I do believe that your rear will find it's happy space fore/aft. That may end up with your knee forward of the pedal spindle or...
Forum: Tandem Cycling
10-30-13, 02:42 PM
Replies: 129
Views: 29,450
Posted By rahill

Don't the little stars in the specs mean those...

Don't the little stars in the specs mean those specs remain unchanged (as you read left to right)? If so, the steering geometry is the same for all the sizes -- same head tube angle, same fork rake,...
Forum: Tandem Cycling
10-29-13, 03:06 PM
Replies: 28
Views: 4,309
Posted By rahill

That must be the idea, since the copper isn't...

That must be the idea, since the copper isn't going to conduct the heat to anywhere else (unlike what would be possible with an aluminum rim). Sure would be nice if there was more than just...
Forum: Tandem Cycling
10-17-13, 09:38 PM
Replies: 13
Views: 4,321
Posted By rahill

Yeah, I'm leaning towards agreeing with the 32 lb...

Yeah, I'm leaning towards agreeing with the 32 lb Carrera quote. Add in 2.7 lbs (which is what they claim the performance package saves), SPD pedals (0.75 lb), Speedplay pedals (0.5 lb), 4 bottle...
Forum: Tandem Cycling
10-17-13, 10:56 AM
Replies: 17
Views: 2,138
Posted By rahill

Yes, but note that's with tubulars where pinch...

Yes, but note that's with tubulars where pinch flats are not nearly the concern. A 27 or 28mm tubular is going to be much more flat resistant than a soft 25mm clincher.

That being said, it's...
Forum: Tandem Cycling
10-17-13, 09:14 AM
Replies: 13
Views: 4,321
Posted By rahill

Realistically, 32 lbs sounds optimistic. The...

Realistically, 32 lbs sounds optimistic. The Robusta we rode weighed 31 lbs and that was with Ultegra shifters, FSA SL-K cranksets, Profile carbon bars, Dura Ace calipers (and a BB5 drag brake),...
Forum: Tandem Cycling
10-17-13, 08:48 AM
Replies: 17
Views: 2,138
Posted By rahill

That seems really low - essentially the...

That seems really low - essentially the recommended pressure for a 700x25 on a single bike (at least according to Michelin...
Forum: Tandem Cycling
10-16-13, 03:14 PM
Replies: 13
Views: 4,321
Posted By rahill

We put about 100 miles on a Robusta while waiting...

We put about 100 miles on a Robusta while waiting for our Speedster. It was an older Robusta with a lateral, so take that for what it's worth. In any case, I didn't notice any additional...
Forum: Tandem Cycling
10-15-13, 08:54 PM
Replies: 17
Views: 2,138
Posted By rahill

Continental Gatorskin 700x28c on Velocity Dyad...

Continental Gatorskin 700x28c on Velocity Dyad rims, 110 psi, 300 lb team.
Forum: Tandem Cycling
10-15-13, 12:41 PM
Replies: 29
Views: 10,317
Posted By rahill

Wound-Up will make you a tandem fork...

Wound-Up will make you a tandem fork (http://www.woundupcomposites.com/specs.html) with your choice of rake (as long as your choice is 45 or 50 mm) that's a little lighter than the Co-Motion and...
Forum: Tandem Cycling
10-14-13, 01:52 PM
Replies: 444
Views: 145,046
Posted By rahill

Well there should be a lot of information...

Well there should be a lot of information available in the next year or so with regards to the Spyre and tandem use. All of the 2014 Co-Motion models, with the exception of low-end Primera and Java,...
Forum: Tandem Cycling
10-09-13, 10:51 AM
Replies: 29
Views: 8,942
Posted By rahill

We have not found this to be a problem. In fact...

We have not found this to be a problem. In fact the automatic locking of that rotating portion (there's a push button) seemed far superior to the pin that the Thule/ATOC used. I loaded the bike on...
Forum: Tandem Cycling
10-08-13, 01:28 PM
Replies: 29
Views: 8,942
Posted By rahill

We went through this recently and settled on the...

We went through this recently and settled on the RockyMounts. I didn't like that the Yakima grabbed onto the boom tube, inevitably scratching it. The Yakima is the shortest though, by far, which...
Forum: Tandem Cycling
10-06-13, 10:23 AM
Replies: 1,509
Views: 669,137
Posted By rahill

Here's the first decent shot of our new Co-Motion...

Here's the first decent shot of our new Co-Motion Speedster. Taken during yesterday's (10/5) Low Key Hill Climb (http://lowkeyhillclimbs.com/2013/week1/) up Montebello Road in Cupertino, CA. We...
Forum: Tandem Cycling
09-25-13, 12:51 PM
Replies: 170
Views: 25,696
Posted By rahill

Actually, 2 watts is worth something on the order...

Actually, 2 watts is worth something on the order of a pound* on a moderate grade. However, it's hard to argue that the cleanliness, etc. of a belt isn't worthwhile.

* play with the numbers...
Showing results 1 to 50 of 65
 
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