Our Tandem on Cyclemonkey Blog
#1
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Our Tandem on Cyclemonkey Blog
Cyclemonkey did a nice write-up of our tandem on their Monkey Lab blog:
https://cyclemonkeylab.blogspot.com/2...loff.html#more
https://cyclemonkeylab.blogspot.com/2...loff.html#more
Last edited by swc7916; 10-31-13 at 11:52 AM. Reason: changed link
#3
Hook 'Em Horns
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Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy
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Interesting drivetrain. Don't think I've ever seen anyone use the smaller chainring on a double to connect the timing chain. Great idea.
Are you pretty happy with the Rohloff? Seems like it would make for a much easier to use drivetrain on a tandem.
Are you pretty happy with the Rohloff? Seems like it would make for a much easier to use drivetrain on a tandem.
#4
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Bikes: 1980's Spectrum 10 sp Campagnolo Centaur, 1990 Eddy Merckx 10 sp Campagnolo Centaur, Bushnell Tandem, Co-Motion Speedster Tandem
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Looks great! Saw your bike on R&E's website. It is always fun knowing who owns the bikes you've drooled over.
#5
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How about a ride report?
Any pros, cons so far with the Rohloff?
What is the weight as pictured?
Why not go with belt drives? Or did you want that brighter look the chain seems to give to match the bike color theme?
#6
Likes to Ride Far
A couple of people above asked for feedback about running a Rohloff on a tandem, so here goes:
We used a Rohloff on our tandem for a couple of months. We took it off because you can only shift the Rohloff during the dead-spot of the pedaling motion - if there's any power going through the drivetrain then it won't shift, or it will at least be very hard to do so. Since we prefer to have our cranks 90 degrees out of phase, we have no dead spot, and so shifting with the Rohloff was pretty poor - all of the derailleur setups that we've had on the bike have worked better (we've had Shimano, Campy, and SRAM shifters on there and Shimano MTB, Shimano road, and SRAM MTB derailleurs). I've since put the Rohloff hub on a 29er hardtail MTB, and in that application it is awesome. I assume that if you pedal in phase on a tandem then a Rohloff would shift pretty well.
I'm also not a fan of the Rohloff for road riding because the 13.6% shifts are too large. Most 10-speed road cassettes have cog size differences of 8-12%, with some wider-range cassettes having one or two 13-15% jumps. 13.6% is more similar to the jumps made on MTB cassettes, and that is the domain it is targeted at, as well as adventure bike tourers. Instead of having a 500+% gear range, I'd rather that Rohloff made a road version with a gear range of only about 400% but had 11-12% differences between gears. Again, I've found the hub to be ideal on a MTB (especially because derailleurs get so easily knocked out of line or much worse in any technical terrain) but IMO it is not suited to road riding after you're accustomed to 10-speed cassettes.
We used a Rohloff on our tandem for a couple of months. We took it off because you can only shift the Rohloff during the dead-spot of the pedaling motion - if there's any power going through the drivetrain then it won't shift, or it will at least be very hard to do so. Since we prefer to have our cranks 90 degrees out of phase, we have no dead spot, and so shifting with the Rohloff was pretty poor - all of the derailleur setups that we've had on the bike have worked better (we've had Shimano, Campy, and SRAM shifters on there and Shimano MTB, Shimano road, and SRAM MTB derailleurs). I've since put the Rohloff hub on a 29er hardtail MTB, and in that application it is awesome. I assume that if you pedal in phase on a tandem then a Rohloff would shift pretty well.
I'm also not a fan of the Rohloff for road riding because the 13.6% shifts are too large. Most 10-speed road cassettes have cog size differences of 8-12%, with some wider-range cassettes having one or two 13-15% jumps. 13.6% is more similar to the jumps made on MTB cassettes, and that is the domain it is targeted at, as well as adventure bike tourers. Instead of having a 500+% gear range, I'd rather that Rohloff made a road version with a gear range of only about 400% but had 11-12% differences between gears. Again, I've found the hub to be ideal on a MTB (especially because derailleurs get so easily knocked out of line or much worse in any technical terrain) but IMO it is not suited to road riding after you're accustomed to 10-speed cassettes.
#7
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A couple of people above asked for feedback about running a Rohloff on a tandem, so here goes:
We used a Rohloff on our tandem for a couple of months. We took it off because you can only shift the Rohloff during the dead-spot of the pedaling motion - if there's any power going through the drivetrain then it won't shift, or it will at least be very hard to do so. Since we prefer to have our cranks 90 degrees out of phase, we have no dead spot, and so shifting with the Rohloff was pretty poor - all of the derailleur setups that we've had on the bike have worked better (we've had Shimano, Campy, and SRAM shifters on there and Shimano MTB, Shimano road, and SRAM MTB derailleurs). I've since put the Rohloff hub on a 29er hardtail MTB, and in that application it is awesome. I assume that if you pedal in phase on a tandem then a Rohloff would shift pretty well.
I'm also not a fan of the Rohloff for road riding because the 13.6% shifts are too large. Most 10-speed road cassettes have cog size differences of 8-12%, with some wider-range cassettes having one or two 13-15% jumps. 13.6% is more similar to the jumps made on MTB cassettes, and that is the domain it is targeted at, as well as adventure bike tourers. Instead of having a 500+% gear range, I'd rather that Rohloff made a road version with a gear range of only about 400% but had 11-12% differences between gears. Again, I've found the hub to be ideal on a MTB (especially because derailleurs get so easily knocked out of line or much worse in any technical terrain) but IMO it is not suited to road riding after you're accustomed to 10-speed cassettes.
We used a Rohloff on our tandem for a couple of months. We took it off because you can only shift the Rohloff during the dead-spot of the pedaling motion - if there's any power going through the drivetrain then it won't shift, or it will at least be very hard to do so. Since we prefer to have our cranks 90 degrees out of phase, we have no dead spot, and so shifting with the Rohloff was pretty poor - all of the derailleur setups that we've had on the bike have worked better (we've had Shimano, Campy, and SRAM shifters on there and Shimano MTB, Shimano road, and SRAM MTB derailleurs). I've since put the Rohloff hub on a 29er hardtail MTB, and in that application it is awesome. I assume that if you pedal in phase on a tandem then a Rohloff would shift pretty well.
I'm also not a fan of the Rohloff for road riding because the 13.6% shifts are too large. Most 10-speed road cassettes have cog size differences of 8-12%, with some wider-range cassettes having one or two 13-15% jumps. 13.6% is more similar to the jumps made on MTB cassettes, and that is the domain it is targeted at, as well as adventure bike tourers. Instead of having a 500+% gear range, I'd rather that Rohloff made a road version with a gear range of only about 400% but had 11-12% differences between gears. Again, I've found the hub to be ideal on a MTB (especially because derailleurs get so easily knocked out of line or much worse in any technical terrain) but IMO it is not suited to road riding after you're accustomed to 10-speed cassettes.
Or am I mixing this up entirely?
#8
Senior Member
Changing the sprockets would change the overall gearing by a constant factor, but it won't change the size of the steps between internal gears.
#9
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The appeal of clean, low maintenance, and being able to shift while stopped sounded great for a future drivetrain. I didn't know you couldn't shift while actually pedaling. That would be a major drawback if you want to keep up in the draft on a tandem.
Sounds like I will keep the old, tried and true, drivetrain.
#10
Likes to Ride Far
You can shift while pedaling, but you have to ease off the power quite a bit more than you do with a derailleur system. As I said, you can normally make a shift by doing so in the dead-spot of the pedal stroke, but that doesn't exist on a tandem that is setup out of phase.
#11
Senior Member
Nice! We have the same brake setup on our tandems (2 cantilevers and rear disc). I'm okay with the braking but wondered how those Rodriquez cantilevers work for you. I considered using them before going with Shimano.
#12
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The Rodriguez cantilevers are the most adjustable - and easiest to adjust - cantilevers I have worked with. They're pricey, but I would not consider any other cantilevers.
#13
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You can shift while pedaling, but you have to ease off the power quite a bit more than you do with a derailleur system. As I said, you can normally make a shift by doing so in the dead-spot of the pedal stroke, but that doesn't exist on a tandem that is setup out of phase.
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If anyone is interested there is a Co-Motion listed for sale with a belt drive and Rohloff!
New Hampshire craigslist
https://nh.craigslist.org/bik/4265504592.html
New Hampshire craigslist
https://nh.craigslist.org/bik/4265504592.html
#16
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I'll bet that there are not many people who have tried DI2 on a tandem. I happen to be one of the few people who have tried Roholff on a tandem, however. With a derailleur system, whether cable-operated or electonic, the rear wheel still takes a partial revolution to move the chain from one cog to the other. With the Rohloff, this is not a factor and shifts can occur quicker than a derailleur.
#17
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Your bike is beautiful. The shaped tubing is art in my opinion. What kind of tubing is that?
Is this the bike you are thinking of putting the Compass tires on? The more I ride those tires, the more enthusiastically I want to recommend them. I don't think you'd regret giving them a shot. Plus, they would look super sweet on your Rodriguez.
Cheers!
Henry
Is this the bike you are thinking of putting the Compass tires on? The more I ride those tires, the more enthusiastically I want to recommend them. I don't think you'd regret giving them a shot. Plus, they would look super sweet on your Rodriguez.
Cheers!
Henry
Cyclemonkey did a nice write-up of our tandem on their Monkey Lab blog:
https://cyclemonkeylab.blogspot.com/2...loff.html#more
https://cyclemonkeylab.blogspot.com/2...loff.html#more
#18
Banned
2 eccentric BB's makes the tensioning both chains Tidy.
My Rohloff bikes are my favorite .. though i'm Single, so No tandem .
both 16t cog, 38t on 26" wheel. 53t on the 20" wheel ..
Im Old too so a lower High is just fine.
My Rohloff bikes are my favorite .. though i'm Single, so No tandem .
both 16t cog, 38t on 26" wheel. 53t on the 20" wheel ..
Im Old too so a lower High is just fine.
#19
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Your bike is beautiful. The shaped tubing is art in my opinion. What kind of tubing is that?
Is this the bike you are thinking of putting the Compass tires on? The more I ride those tires, the more enthusiastically I want to recommend them. I don't think you'd regret giving them a shot. Plus, they would look super sweet on your Rodriguez.
Cheers!
Henry
Is this the bike you are thinking of putting the Compass tires on? The more I ride those tires, the more enthusiastically I want to recommend them. I don't think you'd regret giving them a shot. Plus, they would look super sweet on your Rodriguez.
Cheers!
Henry
You're making me want to pry $120 from my wallet to try out the Compass tires....
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