Another day with wheels (and so on).
I took in a ZIPP 303 wheel rebuild job.
↑Before rebuild
Apparently this hub can't be converted to Shimano 11-speed.
That's the reason for the rebuild.
The customer brought in a Novatec (replacement hub).
Now I'm doing the rebuild, but this radial lacing on the freewheel side turns out to be quite the formidable opponent.
I'm not saying that because the quality is bad.
I mean it's a "formidable opponent" because the quality is so good that it's difficult to rebuild it and make it even better.
The freewheel side radial lacing is, in theory, the optimal solution for correcting spoke tension imbalance between left and right.
On this hub, the non-freewheel side is 1-cross, so it's not laced in the most-tangential pattern.
If there's a foothold for improvement, it would be here.
It's a battle between the optimization of spoke tension reduction with the freewheel side radial lacing before the rebuild and the optimization of spoke tension increase with the non-freewheel side most-tangential lacing after the rebuild.
The reason the non-freewheel side of the hub before rebuild is 1-cross is that the flanges are almost coaxial except for the thickness of spoke crossing.
If it had offset-axis flanges like the older ZIPP hubs' freewheel side, they could have gone with a 2-cross design,
but offset-axis flanges seem to create a lot of air turbulence in the flange area.
Though it's on the inner part of the wheel, ZIPP places great emphasis on aerodynamics, so maybe that's what concerned them.
Rebuilt.
Semi-competition 3-cross lacing.
I took in another ZIPP 303 wheel rebuild job.
↑Before rebuild
Apparently this hub can't be converted to Shimano 11-speed.
That's the reason for the rebuild.
I'll be using our shop's Tni hub.
Now I'm doing the rebuild, but this radial lacing on the freewheel side turns out to be quite the formidable opponent.
I'm not saying that because the quality is bad.
I mean it's a "formidable opponent" because the quality is so good that it's difficult to rebuild it and make it even better.
The freewheel side radial lacing is, in theory, the optimal solution for correcting spoke tension imbalance between left and right.
On this hub, the non-freewheel side is 1-cross, so it's not laced in the most-tangential pattern.
If there's a foothold for improvement, it would be here.
It's a battle between the optimization of spoke tension reduction with the freewheel side radial lacing before the rebuild and the optimization of spoke tension increase with the non-freewheel side most-tangential lacing after the rebuild.
The customer asked me to measure the rim weight before the rebuild,
but sorry, I forgot.
Though even if I had measured it, I wouldn't post it here anyway.
↑Cut it out!!!
But I do appreciate that you measured it for me.
Rebuilt.
Full CX-RAY 3-cross lacing.
The two customers don't know each other,
but it's funny how the same type of job ends up coming in at the same time.
I took in a ZIPP 303 wheel rebuild job.
↑Before rebuild
Apparently this hub can't be converted to Shimano 11-speed.
That's the reason for the rebuild.
The customer brought in a Novatec (replacement hub).
Now I'm doing the rebuild, but this radial lacing on the freewheel side turns out to be quite the formidable opponent.
I'm not saying that because the quality is bad.
I mean it's a "formidable opponent" because the quality is so good that it's difficult to rebuild it and make it even better.
The freewheel side radial lacing is, in theory, the optimal solution for correcting spoke tension imbalance between left and right.
On this hub, the non-freewheel side is 1-cross, so it's not laced in the most-tangential pattern.
If there's a foothold for improvement, it would be here.
It's a battle between the optimization of spoke tension reduction with the freewheel side radial lacing before the rebuild and the optimization of spoke tension increase with the non-freewheel side most-tangential lacing after the rebuild.
The reason the non-freewheel side of the hub before rebuild is 1-cross is that the flanges are almost coaxial except for the thickness of spoke crossing.
If it had offset-axis flanges like the older ZIPP hubs' freewheel side, they could have gone with a 2-cross design,
but offset-axis flanges seem to create a lot of air turbulence in the flange area.
Though it's on the inner part of the wheel, ZIPP places great emphasis on aerodynamics, so maybe that's what concerned them.
Rebuilt.
Semi-competition 3-cross lacing.
I took in another ZIPP 303 wheel rebuild job.
↑Before rebuild
Apparently this hub can't be converted to Shimano 11-speed.
That's the reason for the rebuild.
I'll be using our shop's Tni hub.
Now I'm doing the rebuild, but this radial lacing on the freewheel side turns out to be quite the formidable opponent.
I'm not saying that because the quality is bad.
I mean it's a "formidable opponent" because the quality is so good that it's difficult to rebuild it and make it even better.
The freewheel side radial lacing is, in theory, the optimal solution for correcting spoke tension imbalance between left and right.
On this hub, the non-freewheel side is 1-cross, so it's not laced in the most-tangential pattern.
If there's a foothold for improvement, it would be here.
It's a battle between the optimization of spoke tension reduction with the freewheel side radial lacing before the rebuild and the optimization of spoke tension increase with the non-freewheel side most-tangential lacing after the rebuild.
The customer asked me to measure the rim weight before the rebuild,
but sorry, I forgot.
Though even if I had measured it, I wouldn't post it here anyway.
↑Cut it out!!!
But I do appreciate that you measured it for me.
Rebuilt.
Full CX-RAY 3-cross lacing.
The two customers don't know each other,
but it's funny how the same type of job ends up coming in at the same time.