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But it's quite unusual right? Never seen it before.
Have you been looking? They have been a thing for at least 80 years 🙂
Hopefully at least twice as long, since you need to buy an extra chain with this configuration.
Exactly twice as long, assuming the chain is exactly twice as long. It's a saving in labour, not materials. The smaller skew angle might give a slight increase in chairing and cassette life, but I doubt that it's noticeable.
gbj_tester-
But it's quite unusual right? Never seen it before.
Let me rephrase; on 'modern' tandems. Surely this configuration is inferiour (all aspects considered), otherwise it would still be widespread today?
It's a saving in labour, not materials.
Is it really though? You need to connect the two chains instead of shortening one extra. The time saving in labour seems negligible.
Tijs
But it's quite unusual right? Never seen it before.
Hopefully at least twice as long, since you need to buy an extra chain with this configuration.