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Ok, I've HAD it!!!

Old 05-12-10, 08:53 PM
  #1  
Jtgyk
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Ok, I've HAD it!!!

Started popping spokes on my back wheel after about 1000 mi of use (abuse).
700c Alexrim DH19 laced to a Deore hub with 36 2mm straight spokes.

I'll be rebuilding it with DT Alpine III spokes (as soon as they come in from SJS)

Hopefully that will take care of the problem with careful tensioning.

If that doesn't do the job, I'll fork out the dough for a Phil Wood 7 speed freewheel hub 48 spokes and a rhyno or chukker rim. It'll be heavy as hell, but I should be able to depend on it.
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Old 05-12-10, 09:35 PM
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Why not try a Deep V first? Alex isn't a good rim imo. I've posted it many times but riders insist then return with problems. I think you may be one that I rec'd a V in your thread!

btw, chuckers look COOOOOL!

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Old 05-12-10, 09:39 PM
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Agreed on the deep V. Mine have 4500 miles of hard use on them now, and haven't been touched after the initial retensioning. Still as true as the day they were installed and this is on rough as cobs Indiana roads.
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Old 05-12-10, 10:07 PM
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Mr B

Yeah, you probably DID recommend Deep V's Way back when....shoulda' listened to you then, but had to learn the hard way that good wheels are worth the money.

I can see chukkers in my future if the current wheel turns into a complete bucket of suckage, but I'll go ahead with the rebuild since the new spokes are sized for the current rim/hub combo I have now (unless you know of a better rim I can get that has an ERD of 599.7 so I haven't flushed my $$ for the spokes I bought?) Though, I can see what the return/exchange policy at SJS is and maybe recalculate for Chukkers.
Is it obvious that I'm liking the idea of Chukkers?
heh...chukkers...it's a fun word.

Deep V is an option, but I sure like my 35c tires for commuting.
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Old 05-12-10, 10:13 PM
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Might as well use the spokes now, new wheels will always be a part of riding!...I saw some dude on Chukkers flying the last couple of times on the trail. I'm tempted just cause they look cool! Weight didn't seem to affect this skinny feller!
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Old 05-12-10, 10:45 PM
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Of course a good deal of spokeulopoppage was more than likely due to under-tensioned spokes. You're a wheel builder...how do you determine when you are in the right ballpark for drive side spoke tension? Do you use a tensiometer? About what tension should you shoot for on the drive side?
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Old 05-13-10, 09:29 AM
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I check with a tension meter (borrowed from my buddy). But the values are given to me by a buddy of mine that builds wheels at a shop. I'd imagine the mechanics forum peepe could provide you with coreect values.
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Old 05-13-10, 09:38 AM
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Have a tension meter as I'd been planning on learning to build my own wheels. I've just never heard any specifics about tension to shoot for. So far specs I've found on rims haven't had a max tension listed.

I'll pop over to the mechanics forum and let them abuse me for awhile.
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Old 05-13-10, 09:45 AM
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I should buy one. When I went to the shop. buddy said don't waste my money, I can borrow his. But still, I should get one now that I build more than I had planned.

He works at ashop and has along list of values, spoke legth, tension, ERD's etc. Plus he does the math if it's not on the list, I just watch when it comes down to that part!
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Old 05-13-10, 11:54 AM
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So far the best I can discern from reading, is 110 - 120 kgf for the drive side depending on how extreme the dish of the wheel.
9 - 10 speed wheels would tend to need the higher since they have more dish.
I'm glad I have an older wheel to work on first, now that I have a value range to work from.

Gotta get me some of them charts though.
Or start buying beers for the resident wheel builder at the shop!
mmmmmmm........beer.
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Old 05-13-10, 12:30 PM
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Also... check on the spoke hole diameter on your hubs. Alpine III's have a thicker and stronger elbow and I've had issues getting them into some hubs. Although the real issue happens when you've got a hub designed for them and you use regular 2.0mm spokes... you'll get some serious spoke breakage. Spoke tension really depends on the hub, rim, spoke type, spoke pattern, etc... but if you have parts and a spoke lacing pattern in mind someone in the mechanics forum should be able to help you out with specifics.
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