D
Doug
Guest
Hey all,
During a routine inspection, I noticed what look like fatigue lines in my Bullseye front hub.
Lacing is 24 radial, Wheelsmith spokes, double butted, not sure of gauge. About 3000-4000 miles on
it, 180 pound rider, Velocity Deep V rim, 700x23 tires @100 psi always.
Pics at http://draizk.tripod.com/hub
Note the bright lines stretching between the spoke holes in the flange. These lines are only on the
outside of the flange. They do not stretch between all holes. On both sides, they stretch between 9
holes. The lines are more visible on the left flange, skewer handle side.
With 12 spokes per side, there are of course 12 spaces between spoke holes. So there are 3 spaces
with no lines. Those 3 spaces are exactly 180 deg from each other around the wheel. ie, on the
right side the 3 clean spaces are down, on the left the 3 clean spaces are up. If that helps
determine anything.
Please advise. Safety first and only. This thing will go if this is any indication.
Beyond the issue of failure or not, what may have caused this? Normal fatigue that is expected? A
single hard road hit? Too many cumulative hits? Too high spoke tension? The pitfalls of radial
lacing? A weakness in this Bullseye hub? I had convinced myself this was a very good hub for radial
lacing and was confident in it.
Thanks, Doug
During a routine inspection, I noticed what look like fatigue lines in my Bullseye front hub.
Lacing is 24 radial, Wheelsmith spokes, double butted, not sure of gauge. About 3000-4000 miles on
it, 180 pound rider, Velocity Deep V rim, 700x23 tires @100 psi always.
Pics at http://draizk.tripod.com/hub
Note the bright lines stretching between the spoke holes in the flange. These lines are only on the
outside of the flange. They do not stretch between all holes. On both sides, they stretch between 9
holes. The lines are more visible on the left flange, skewer handle side.
With 12 spokes per side, there are of course 12 spaces between spoke holes. So there are 3 spaces
with no lines. Those 3 spaces are exactly 180 deg from each other around the wheel. ie, on the
right side the 3 clean spaces are down, on the left the 3 clean spaces are up. If that helps
determine anything.
Please advise. Safety first and only. This thing will go if this is any indication.
Beyond the issue of failure or not, what may have caused this? Normal fatigue that is expected? A
single hard road hit? Too many cumulative hits? Too high spoke tension? The pitfalls of radial
lacing? A weakness in this Bullseye hub? I had convinced myself this was a very good hub for radial
lacing and was confident in it.
Thanks, Doug