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IGH the difference between the Shimano Inter-8 and Nexus

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IGH the difference between the Shimano Inter-8 and Nexus

Old 02-11-20, 05:01 PM
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Sirrus Rider
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IGH the difference between the Shimano Inter-8 and Nexus

What is the difference between the Shimano Inter-8 and Nexus 8?
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Old 02-11-20, 10:11 PM
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In my experience, which is somewhat limited, they are the same. If you look at this: SHIMANO it seems that "Inter-8" is an umbrella category that includes both "Nexus" and "Alfine".
HTH.
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Old 02-12-20, 09:08 AM
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As far as ratio jumps the two are quite similar. But the chart says nothing about the internal design or grade of manufacturing. Interesting that the 7 shows no 1:1 ratio, suggesting no direct drive where friction losses would be least. I wonder if the ".99" ratio, in the 7, is a rounding off error. Andy
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Old 02-12-20, 10:18 AM
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Originally Posted by Andrew R Stewart View Post
As far as ratio jumps the two are quite similar. But the chart says nothing about the internal design or grade of manufacturing. Interesting that the 7 shows no 1:1 ratio, suggesting no direct drive where friction losses would be least. I wonder if the ".99" ratio, in the 7, is a rounding off error. Andy
the 7 speed does not have a direct drive ratio. The.99 ratio is compounded to get close.
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Old 02-12-20, 12:58 PM
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Dan- I thought that there was an internal/gear train difference between the 7 and the 8 geared hubs. My understanding of IGH efficiency is that the gear with the least gear train has the least power loss. This comes from the SA AW, Sachs Torpedo Boy and the Shimano 333 stuff where 2nd gears were direct. It is fairly easy to feel the efficiency differences between running through the gear system and direct. I have much less experience with current IGH offerings, while I've done quite a number of after service test rides on many IGH bikes over the years that's not a good time to try to feel out the subtleties of IGH internal efficiency with other goals and limited time coming first. Andy
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Old 02-16-20, 08:26 PM
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Originally Posted by Dan Burkhart View Post
the 7 speed does not have a direct drive ratio.
About 20 years ago, when I was new to internally-geared hubs and had a Nexus-7, I emailed Sheldon Brown and asked him if this hub had a direct drive. His one-word response: "No."
A man of few words, was Mr. Brown. :-)
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