P
philcycles
Guest
[email protected] wrote:
> Phil Brown writes:
>
> >> Interesting thought on the dropout alignment as a contributing
> >> factor-two failed during cornering with the dropouts subsequently
> >> being misaligned from the rear torsional carnage. If there was
> >> slight misalignment before the failure, it was masked by the
> >> magnitude of bent dropouts and stays, bent luggage rack, destroyed
> >> riders, destroyed spoke protectors and bent spokes when the wheel
> >> locks itself into the frame in an unsuccessful attempt to laterally
> >> escape its home. One bike that had an axle failure whilst going
> >> straight did not suffer subsequent trouble over an extensive period
> >> when another freewheel rear was substituted even though no dropout
> >> alignment checks were performed. Failures on the axles were always
> >> proximate the bearings rather than at the dropouts suggesting the
> >> axles couldn't support the long runs between bearings and dropouts.
> >> My suspicion is alignment was not a significant issue though I
> >> can't rule that out.
>
> > Bent and broken axles are almost always caused by non parallel
> > dropouts and they don't break at the dropout but somewhere inboard.
> > While cassette hubs are a very good idea I would have the dropouts
> > professionally aligned and see what happens. BTW I weigh 220, ride
> > old Campy Record hubs spaced 130 and NEVER bend or break axles.
>
> I have never had a non parallel dropout and have piles of Campagnolo
> rear axles used with 120mm spacing, broken at the nose of the right
> cone. I cannot imagine a 130mm spacing surviving for climbing hills
> unless the rider weighs less than 120lbs. Even they have broken axles
> around here.
>
> Jobst Brandt
While I bow to your riding exploits, Jobst, I've been riding 130
spaced Record hubs for a long time and, while they aren't the Alps,
Mt. Tam, the San Gabriels and the Santa Monica Mountains-my normal
riding turf for the past 30 years-have some good climbing requiring
all the mustard I've got. No broken or bent axles.
Phil Brown
> Phil Brown writes:
>
> >> Interesting thought on the dropout alignment as a contributing
> >> factor-two failed during cornering with the dropouts subsequently
> >> being misaligned from the rear torsional carnage. If there was
> >> slight misalignment before the failure, it was masked by the
> >> magnitude of bent dropouts and stays, bent luggage rack, destroyed
> >> riders, destroyed spoke protectors and bent spokes when the wheel
> >> locks itself into the frame in an unsuccessful attempt to laterally
> >> escape its home. One bike that had an axle failure whilst going
> >> straight did not suffer subsequent trouble over an extensive period
> >> when another freewheel rear was substituted even though no dropout
> >> alignment checks were performed. Failures on the axles were always
> >> proximate the bearings rather than at the dropouts suggesting the
> >> axles couldn't support the long runs between bearings and dropouts.
> >> My suspicion is alignment was not a significant issue though I
> >> can't rule that out.
>
> > Bent and broken axles are almost always caused by non parallel
> > dropouts and they don't break at the dropout but somewhere inboard.
> > While cassette hubs are a very good idea I would have the dropouts
> > professionally aligned and see what happens. BTW I weigh 220, ride
> > old Campy Record hubs spaced 130 and NEVER bend or break axles.
>
> I have never had a non parallel dropout and have piles of Campagnolo
> rear axles used with 120mm spacing, broken at the nose of the right
> cone. I cannot imagine a 130mm spacing surviving for climbing hills
> unless the rider weighs less than 120lbs. Even they have broken axles
> around here.
>
> Jobst Brandt
While I bow to your riding exploits, Jobst, I've been riding 130
spaced Record hubs for a long time and, while they aren't the Alps,
Mt. Tam, the San Gabriels and the Santa Monica Mountains-my normal
riding turf for the past 30 years-have some good climbing requiring
all the mustard I've got. No broken or bent axles.
Phil Brown
