Any bicycle with more than one person simultaneously providing power. Includes trandems and other unusual variants.

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2answers
41 views

Trek T-900 Tandem rear hub

I have a Trek T-900 tandem that I bought used. It's probably about 12 or 13 years old. I'm having some rear hub issues with it, but I can't identify what hub it is. Trek's website and other ...
18
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5answers
2k views

Why is a tandem harder to ride uphill than a single rider bike?

With equal power to weight ratio, why is a tandem bike harder to ride uphill? I have friends whose Cannondale tandem bike weighs the same as their single rider bikes combined. But they find it easier ...
1
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1answer
71 views

What should I check with set up of a tandem?

Particularly with reference to hired tandems, or when you're first setting one up. A bit of context: I hired a tandem today and went for a ride with my wife. I've been riding for about 20 years, she ...
3
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2answers
72 views

Derailleur hanger moves when tightening quick release

I have an old Trek T-900 tandem that my wife and I ride quite a bit. It's got an 8-speed rear setup. It's a standard (tandem) 145mm rear-spacing with matching hub, but tightening down the ...
5
votes
1answer
496 views

Why is it called a “timing chain”

Why is the chain connecting the front and rear cranks of a tandem called a timing chain. This brings to mind big-block V8s and leaky timing chain covers that plagued my younger years. What's the ...
3
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4answers
299 views

Why is the rear wheel of my tandem bike skidding?

We have recently bought a tandem and the rear wheel skids out when riding. Any idea why this happens? Comment below: When we are riding along in a straight line and there is an uneven surface it does ...
8
votes
1answer
325 views

Help please to identify my Tandem

I have just purchased an old tandem, but don't know the make or year. Can anyone help me to identify it. The frame is steel and it has a frame number of 452599. There are no decals fitted but I attach ...
1
vote
1answer
162 views

Can anyone identify this Tandem bike I restored from a junk yard?

This is a bike that I rescued from an abandoned junk yard in central California. It was terribly rusted, and I think I am crazy for spending the amount of time and money I did to restore it. I often ...
1
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1answer
124 views

What kind of crank extractor do I need

I'm trying to swap the cranks on our Thorn tandem and would like to know what kind of crank extractor (if any) I need for the job. Is there a way to tell from this photo, before I've taken it all ...
5
votes
1answer
150 views

Tandem team with large height disparity - possible?

My wife and I would like to start riding tandem. I've been reading about it and am worried that we are not physically eligible. She's 165cm, I'm 195cm... I've considered buying a baby trailer and ...
10
votes
1answer
550 views

What's this? Photo of bicycle with pedals by the rear wheel

I just stumbled upon this photo of what appears to be a reasonably normal citybike, except it looks like it has a second set of pedals at the rear wheel. source Anybody knows what it is?
5
votes
2answers
674 views

Can I carry my tandem on a bumper carrier?

I would sometimes like to transport my tandem by car, and it would be convenient to use one of those "strap-on" bumper carriers. Is it feasible to use this type of carrier?
3
votes
0answers
144 views

Claud Butler Tandem - transmission issues

I'm in the process of stripping a SWB Claud Butler tandem so I can get it repainted. There are a couple of things I need help with.... a) Can you fit a front mech to the bike, and if so, are there ...
3
votes
1answer
585 views

What are the alternatives to SwissStop Blue v-brake pads

We've got a tandem with Rigida Andara CSS tungsten carbide rims and Swisstop Blue v-brake pads. We're happy with the performance and life of both of these over the last 1000 miles. The problem is ...
2
votes
3answers
385 views

I unscrewed the lockring, and *both* BB cups rotated - what's going on?

I'm fixing up an old tandem, and the cup-and-cone bottom bracket at the front sounds very gritty, so I picked up my c-spanner and applied it to the lockring. With a bit of effort, left cup and ...
7
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4answers
290 views

Help needed identifying mystery screws on 1940s tandem

My tandem has two small screws above each bottom bracket, one on each side (so four in total). I've not seen them on any other bike, and I can't figure out what they're for! Suggestions so far have ...
1
vote
2answers
283 views

Can a tandem's front bottom bracket fail catastrophically?

Many tandems have a front bottom bracket that looks like this: The front bottom bracket is mounted off-centre in an aluminum shell called "the eccentric." When the pinch bolts shown in the ...
6
votes
4answers
361 views

Tandem for limited space?

I really enjoy cycling, but haven't been doing much lately. My wife also enjoys cycling, but had a bad crash a couple years ago on her fast road bike and now will only ride her old (really slow) ...
10
votes
2answers
1k views

Tandem position - front or back

My ride buddy and I were "volunteered" to ride a tandem bike for a 40 mile, somewhat hilly, charity ride. We're running into the issue of who should be in the front on the tandem. Both of us are ...
5
votes
2answers
370 views

What is the common “vocabulary” for the captain and stoker to communicate?

My wife and I recently rented a tandem for a day. I found that, because everything needs to be communicated -- starting, stopping, changes in cadence, shifting (which might cause changes in cadence), ...
2
votes
3answers
698 views

Where Can I Find a Single Right Front Crank Arm for a Tandem?

Among the bikes in my stable is a department store tandem that really isn't worth much, but would be enjoyable to ride with my wife. Like many department store bikes this one was not assembled ...