A customer brought in the rear wheel from the first-generation Kysirrium
specifically the Kysirrium SSC rear wheel.
They wanted an internal hub overhaul and a wheel truing inspection.
before
after
Internal hub cleaning
before
after
Cleaning all components
before
after
The bearing on the left side of the hub body
was damaged, so I replaced it.
The ratchet teeth inside the freewheel body
haven't worn down that much.
When this area wears significantly, the freewheel body develops
eccentric looseness and abnormal noise develops too.
↑This is an FTS-L freewheel body that we keep at the shop
to show customers—one with severely worn ratchet teeth.
The temporary center was spot-on.
There's a slight wobble.
The spoke tension has relaxed over the years, so
I didn't tension it excessively, but
if there were 100 new rear wheels,
about 5 would probably have this much wobble anyway—
so I re-tensioned it to that degree.
It's possible that this wheel was originally
offset toward the non-drive side when hanging,
and over the years the rim gradually shifted toward the drive side,
and it just happens to be centered now.
Old Dural spokes—and these are the oldest generation—
often have nipples that seize up and won't turn,
but with this Kysirrium, while black dirt came pouring out
from between the spoke flanges, all the nipples turned fine.
I turned the nipples tensioning only the drive side.
After that, when I tighten the non-drive side until the wheel centers,
I account for the slight increase in tension on the drive side
that results from that.
As for the original spoke tension of the Kysirrium SSC,
I won't speak with confidence without actual numerical data.
From that state, I finished the centering and final truing
by further tightening the non-drive side.
specifically the Kysirrium SSC rear wheel.
They wanted an internal hub overhaul and a wheel truing inspection.
before
after
Internal hub cleaning
before
after
Cleaning all components
before
after
The bearing on the left side of the hub body
was damaged, so I replaced it.
The ratchet teeth inside the freewheel body
haven't worn down that much.
When this area wears significantly, the freewheel body develops
eccentric looseness and abnormal noise develops too.
↑This is an FTS-L freewheel body that we keep at the shop
to show customers—one with severely worn ratchet teeth.
The temporary center was spot-on.
There's a slight wobble.
The spoke tension has relaxed over the years, so
I didn't tension it excessively, but
if there were 100 new rear wheels,
about 5 would probably have this much wobble anyway—
so I re-tensioned it to that degree.
It's possible that this wheel was originally
offset toward the non-drive side when hanging,
and over the years the rim gradually shifted toward the drive side,
and it just happens to be centered now.
Old Dural spokes—and these are the oldest generation—
often have nipples that seize up and won't turn,
but with this Kysirrium, while black dirt came pouring out
from between the spoke flanges, all the nipples turned fine.
I turned the nipples tensioning only the drive side.
After that, when I tighten the non-drive side until the wheel centers,
I account for the slight increase in tension on the drive side
that results from that.
As for the original spoke tension of the Kysirrium SSC,
I won't speak with confidence without actual numerical data.
From that state, I finished the centering and final truing
by further tightening the non-drive side.