Sapim CX Ray spoke twist: does this look like an issue?

[macaroon]

I picked up some secondhand wheels (carbon rims built with straight pull CX Ray spokes).

Upon inspection, two adjacent spokes on the front wheel are badly twisted, so much so, the alloy has discoloured. Has anyone had similar? If so, were they okay, or did you replace?

Thanks

[temeyone]

100% replace.

[AngryScientist]

moved to GD

also - yes, replace those. that's just a broken spoke waiting to happen.

[ultraman6970]

Never seen such a twist. Why that hasn't snapped yet?

[bward1028]

agreed, that's bad.
Either replace them now, or replace them with a fiberfix when you are out on a ride.

I would thoroughly check EVERYTHING else on those wheels. that reeks of shadetree mechanic-ship.

[HTupolev]

Absolutely replace.

And be extremely suspicious of everything else about those wheels.

[macaroon]

Yeh, probably best to either send them back or replace them. I guess the wheel has been trued by an amateur, there is a slight wobble where these two spokes are located. Aside from this, the wheels seem fine and don't appear to have seen much use. Although, the front spokes (20 off, radial laced) seem hellishly tight, tighter than my other front wheel (which is almost identical). Is that usually the case with this lacing?

[AngryScientist]

CX rays and other light gauge spokes can have problems like this, and can be made much worse if the wheel was built with some sort of "locking" spoke prep (or no lube and the nips are seized...).

if your front wheel is out of true, and has a couple twisted spokes, it's best to have a competent wheelbuilder check all the spoke tensions and get it balanced with proper spoke tension, or you will forever be chasing the problem.

otherwise, just return them.

[bikinchris]

Originally Posted by ultraman6970

Never seen such a twist. Why that hasn't snapped yet?

Because even the thinnest spokes around are three times stronger than they need to be to do their job.
But yes, replace those spokes.

[chismog]

Originally Posted by AngryScientist

CX rays and other light gauge spokes can have problems like this.

Yup, I find it's pretty much mandatory to hold these spokes to prevent twisting when truing. DT Revolutions are the worst, you can't even tell when they twist because of their round profile.

Replace. And check the wheel carefully, as others said.

[Black Dog]

Originally Posted by chismog

Yup, I find it's pretty much mandatory to hold these spokes to prevent twisting when truing. DT Revolutions are the worst, you can't even tell when they twist because of their round profile.

Replace. And check the wheel carefully, as others said.

For round spokes a piece of masking tape folded over the spoke will let you monitor any wind up. There are special pliers that are designed to hold onto round spokes to prevent windup.

[ultraman6970]

The couple of wheels I have with straight pull spokes I put aero spokes just because of the twisting situation, are easier to hold with a hand made tool.

[mcc21]

looks dangerous!

[oldpotatoe]

Originally Posted by macaroon

I picked up some secondhand wheels (carbon rims built with straight pull CX Ray spokes).

Upon inspection, two adjacent spokes on the front wheel are badly twisted, so much so, the alloy has discoloured. Has anyone had similar? If so, were they okay, or did you replace?

Thanks

Yup, replace or ayup, they will break there. Some dude didn't have a tool to prevent this or the nipples are 'glued' to the spoke..bad news and poor show either way.

Mentioned above, called a 'Twist Resist'. Great for aero or any thin spoke..

BTW-I'd send them back as well..obviously the person that worked on these is 'lacking'..

[tonyfanatic]

Originally Posted by temeyone

100% replace.

Yes, replace it. Weird that the spoke twisted like that. Straight pull usually just keeps on spinning unless you hold it with a tool so you can achieve tension. My suspicion here is that the nipple is stuck frozen on the tread and when whoever tried to true the wheel twisted it by over-tightening it. It may not be necessary to replace all the spokes.

Sapim cxray can take lots of abuse because they are somewhat flexy. That's why wheels built with cxray feel comfortable MTB riders love them.
If you want a super stiff wheel, say for crit racing, sprinting, a round spoke section preferably straight gauge will be the best choice but, the wheel will feel like a brick and no aero marginal gains