Wheelbuilding: Spoke question
#76
Junior Member
Joined: Nov 2017
Posts: 5
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Finite element analysis of the spoke
- Proper spoke for the application.
- Lightweight rims (sub 500gm) don't require anything beyond 2.0/1.8/2.0 spokes.
- A 32 spoke wheel with sub 500gm rim built properly will reach end-of-life from rim failure, not spoke breakage. This is esp true with today's 130mm/135mm hubs with less dish than BITD 120mm 6-speed freewheel hubs.
- Using heavier 2.3mm butts at the bend instead of 2.0mm is to compensate for poor wheel building skills, not to add any actual advantage for properly designed and properly build wheels.
- DT 2.3/1.8/2.0 spokes don't offer any advantage over standard 2.0/1.8/2.0 spokes.
- DT doesn't use 2.3/1.8/2.0 spokes on any of their premade wheels and none of them have more than 28 spokes (those are MTB wheelsets, road wheelsets are 24 spoke for disc, 20/16 for road)....
- The canard about double butted spokes relieving stress at the bend and adding to spoke life doesn't follow the simplest engineering principals known to successful 1st year engineering students....
- No one has ever demonstrated the "DB spokes make the wheel stronger" theory with computer simulations either....
- The reason why no one has demonstrated the theory with computer simulation it is because it's false....
- Lightweight rims (sub 500gm) don't require anything beyond 2.0/1.8/2.0 spokes.
- A 32 spoke wheel with sub 500gm rim built properly will reach end-of-life from rim failure, not spoke breakage. This is esp true with today's 130mm/135mm hubs with less dish than BITD 120mm 6-speed freewheel hubs.
- Using heavier 2.3mm butts at the bend instead of 2.0mm is to compensate for poor wheel building skills, not to add any actual advantage for properly designed and properly build wheels.
- DT 2.3/1.8/2.0 spokes don't offer any advantage over standard 2.0/1.8/2.0 spokes.
- DT doesn't use 2.3/1.8/2.0 spokes on any of their premade wheels and none of them have more than 28 spokes (those are MTB wheelsets, road wheelsets are 24 spoke for disc, 20/16 for road)....
- The canard about double butted spokes relieving stress at the bend and adding to spoke life doesn't follow the simplest engineering principals known to successful 1st year engineering students....
- No one has ever demonstrated the "DB spokes make the wheel stronger" theory with computer simulations either....
- The reason why no one has demonstrated the theory with computer simulation it is because it's false....
#77
Junior Member
Joined: Nov 2017
Posts: 5
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danmyersmn, Did your wheel build happen?
#78
Mostly harmless ™
Joined: Nov 2010
Posts: 4,463
Likes: 244
From: Novi Sad
Bikes: Heavy, with friction shifters
Does sound interesting. Could you (also?) test if there's a point in (very) diminishing returns in terms of wheel's strength when handling vertical (radial) and lateral loads as spoke tension increases - all other things being equal?
#79
Junior Member
Joined: Nov 2017
Posts: 5
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Rim quality (in Aluminim: heat treatment, joining process, cross section design) greatly affect vertical and lateral loads. Spoke tension eveness is affected by the rim strength, which inturn affects structure.
#80
Mostly harmless ™
Joined: Nov 2010
Posts: 4,463
Likes: 244
From: Novi Sad
Bikes: Heavy, with friction shifters





