Wheel build and spoke breaking...
Hi Guys,
My Friend has a small problem with his own wheel that he built himself. The front wheel is laced radially with 20 nr CX-Ray spokes on Hope Pro3 Hub and with Stans 340 rim. The rider weight is only 72-75kg, however the spokes break at the hub / J-bend section during off saddle efforts. The tension between spokes is within 10-15% uniformity.
My theory and the way I would fix the problem would be to change the spoke type for a more flexible spoke or lacing pattern to 1 or 2-cross, or both. Also, the spoke washers may be a good idea here. However, I will appreciate your comments and help on this.
My Friend has a small problem with his own wheel that he built himself. The front wheel is laced radially with 20 nr CX-Ray spokes on Hope Pro3 Hub and with Stans 340 rim. The rider weight is only 72-75kg, however the spokes break at the hub / J-bend section during off saddle efforts. The tension between spokes is within 10-15% uniformity.
My theory and the way I would fix the problem would be to change the spoke type for a more flexible spoke or lacing pattern to 1 or 2-cross, or both. Also, the spoke washers may be a good idea here. However, I will appreciate your comments and help on this.
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My understanding was that you should have tensions equal, not within 10-15%. If you built the front to 100kgf, then 15% would mean one spoke potentially at 85kgf. How have you determined
a/ the variance
b/ you are measuring the tension properly
Quintana Roo Cd01
Project High End Hack
Cannondale Synapse SL (gone)
I like Carbon
Quintana Roo Cd01
Project High End Hack
Cannondale Synapse SL (gone)
I like Carbon
There is no need for willy waving, a total variation of 15% is perfectly fine and normal if that means the lowest is 85 and the highest is 100 and on average they are somewhere in the 90s.
If that means the lowest is 85 and the highest is 115 then it is a different story, but that's not 15%
have to disagree with you as i had a 28 hole radial front which went out of true easily, relaced in 2 crossed and no issues. crossed means the spokes support eachother surely, similar to crossmembers in scaffolding
How?
Spokes work ONLY in tension. Think about it.
No they do not. As for your radial going out of true that was down to poor build quality. I spent five years up to recently riding a self built 28 spoke radial and it never missed a beat.