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-   -   Spoke Recommendation??? (http://www.bikeforums.net/road-cycling/268138-spoke-recommendation.html)

gellomaniac 03-14-14 03:04 AM

Hi everyone. New here and quite late on the discussions on cx-rays vs other spokes. Another angle on the topic here. I was given a very good deal on Gipiemme Tecno 155 Equipe 20/20 wheelsets with 30.5 mm height alloy rims. Both wheels came complete with Sapim cx-Rays. I was satisfied for about 5 months until 2 spokes broke off the NDS rear wheel. Probably from extensive bumps, potholes, and grinding up steep hills. To make matters worse, I'm living in Thailand and the bike shops don't carry the cx-Ray lengths I need, which are 275 front,275 NDS rear, and 286 DS rear. I will have to order them from the US with about 14 dollars shipping cost. The cost of 8 spokes plus shipping will cost as much as replacing the whole rear wheel with dt swiss spokes here. Are the cx-rays worth that extra cash for weekly club rides and occasional races? I weight about 160 lbs and the roads here are not always smooth. I know they are great spokes but are they over qualified for my riding? I have the options to:
1. order the replacement cx-rays with some spares
2. Keep the existing cx-rays on the front wheel and rear DS. Rebuild the NDS with other options of spokes (dt swiss is widely available here. For sapim only lasers come in 275 length
3. Rebuild the rear wheel with other spokes on both sides

Please advice
thanks

canam73 03-14-14 03:52 AM

I would go with option 3.

The aero benefits of the cx ray aren't of much use on the rear DS, and since you have already broken more than one spoke back there I would be inclined to rebuild the whole thing. DT Swiss are decent spokes so if you can get them local I would use them. 20 isn't a lot of spokes for a 30mm rear so I would go with the standard DB, the Competition.

gellomaniac 03-14-14 10:41 AM

Thanks, canam73.

Carbonfiberboy 03-14-14 11:11 AM

I'm under the impression that Cx-Ray spokes are 14/15/14, same as other DB spokes? Spokes usually fail at the elbow from fatigue, and the NDS is the usual side because it's typically undertensioned when built by someone who does it by feel or without a meter.

canam73 03-14-14 11:20 AM

Quote:

Originally Posted by Carbonfiberboy (Post 16577509)
I'm under the impression that Cx-Ray spokes are 14/15/14, same as other DB spokes? Spokes usually fail at the elbow from fatigue, and the NDS is the usual side because it's typically undertensioned when built by someone who does it by feel or without a meter.

CX Rays are a flattened Laser which is 2.0-1.5-2.0 So 14/17/14 I think? The regular "CX" is a flattened Race, which is there standard 14/15/14 DB.

I don't know that the standard DB will help much, that wheel may have been badly tensioned but it also just doesn't sound like enough spokes. I don't think the aero or weight advantage of CX Ray is going to be missed and if a standard DB gives it any extra strength it will be worth it.

Carbonfiberboy 03-14-14 11:27 AM

Quote:

Originally Posted by canam73 (Post 16577538)
CX Rays are a flattened Laser which is 2.0-1.5-2.0 So 14/17/14 I think? The regular "CX" is a flattened Race, which is there standard 14/15/14 DB.

I don't know that the standard DB will help much, that wheel may have been badly tensioned but it also just doesn't sound like enough spokes. I don't think the aero or weight advantage of CX Ray is going to be missed and if a standard DB gives it any extra strength it will be worth it.

Thanks! No, no real advantage to the Cx-Ray there, bang for buck.

Trucker Dan 03-16-14 07:35 AM

Use dt aerolites if money isn't an issue.

canam73 03-16-14 08:41 AM

Quote:

Originally Posted by Trucker Dan (Post 16581886)
Use dt aerolites if money isn't an issue.

If money isn't an issue he should get a rear wheel with more spokes.

Drew Eckhardt 03-16-14 07:45 PM

Quote:

Originally Posted by Vinokurtov (Post 3836133)
Sapim X Ray's would fit exactly what you're looking for.

.

Yeah! At 30 MPH they save one Watt over 1.5mm round spokes for a price premium not much over $2 per spoke which is $120 in a 28/32 set.

Drew Eckhardt 03-16-14 07:48 PM

Quote:

Originally Posted by kevinmcdade (Post 3836216)
I already have one wheelset built up with CX-Ray spokes and I absolutely love them. Will the CX-Ray spokes be stronger and stiffer than the DT Swiss spoke that was recommended in the first response?

They'll be less stiff and strong.

14/15 gauge spokes have 44% more cross-sectional area with a corresponding increase in stiffness and yield strength.


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