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Old 09-18-06, 09:46 PM   #1
amacks
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what is going on here?



[Picture stolen from cyclingnews.com]
I can see the internal-geared hub, and then there's a deraileur? I've seen bikes with a 5 spd casette and an internal hub, but this doesn't look to have any external rear gears. Any thoughts?
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Old 09-18-06, 10:29 PM   #2
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chain tension. it has a redundent pulley but I guess it saves a couple bucks from having to buy a "real" tensioner.
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Old 09-19-06, 12:15 AM   #3
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is it even a derailleur? I can't see that the linkage could possibly move side to side to change gears. Looks like one of the newer generation of singlespeed tensioners designed to accomodate a wide chain tension range eg on full suspension mountain bikes.

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Old 09-19-06, 08:06 AM   #4
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Quote:
Originally Posted by tomacropod
is it even a derailleur? I can't see that the linkage could possibly move side to side to change gears. Looks like one of the newer generation of singlespeed tensioners designed to accomodate a wide chain tension range eg on full suspension mountain bikes.

I need one of those computers all the top crime fighting labs have. "enhance" "zoom" "enhance"

- Joel
good point. I didn't even look that closely and just saw the two pulleys.
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Old 09-19-06, 08:40 AM   #5
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Quote:
Originally Posted by tomacropod
is it even a derailleur? I can't see that the linkage could possibly move side to side to change gears. Looks like one of the newer generation of singlespeed tensioners designed to accomodate a wide chain tension range eg on full suspension mountain bikes.

I need one of those computers all the top crime fighting labs have. "enhance" "zoom" "enhance"

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No lateral movement, just a tensioner.
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Old 09-19-06, 09:21 AM   #6
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It is a new bianchi w/ a new Shimano nexus 8 with a rear disc brake. I beleive the tensioner is on there becuase there is no eccentric bottom bracket and it allows the abiltiy to adjust the rear wheel.
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