"John Henderson" wrote:
> Jack Russell wrote:
>
>> Pardon my ignorance but what is wrong with vertical dropouts?
>> I thought they were the norm with Rohloff?
>
> They require a chain tensioner. That's more weight, more to go
> wrong, and lots more friction because they gunk up easily and
> often.
>
> I'd rather adjust the chain tension periodically via horizontal
> dropouts. In fact, on my existing SRAM/Sachs hub I use the
> need for adjustment tell me it's time to measure, clean and
> relube the chain.
Check that link for the Jota out again then. It has *no chain tensioner*,
just an oversize or elliptical bottom bracket. This serves to tension your
chain securely, while at the same time you more can easily remove and
install your rear wheel compared to using horizontal dropouts. Rohloff make
a special version of their hub with a special torque fitting that slots into
the dropout also, removing the need for a big clunky torque arm bolted to
your chainstay. Velosmith use this design, as do St John Street Cycles
(Thorn) in the UK.
--
Cheers
Peter
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