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Open Pro/DA question(5 posts)

Open Pro/DA questionblakester
Jan 24, 2004 10:22 AM
The below message about someone who was mad at their Local Local Bike Shop for have Open Pro rims on a bike reminded me of an issue I have been meaning to bring up. I have Open Pros and D/A hubs on my bike (1st serious roadie) and the front wheel is spoked "non-tangentially" in other words, teh spoks all originate at the hub, and don't cross each other. Why is this, and is ti something I should be concerned about? The back wheel is spoked tangentially.

P.S. I weigh 150lbs
re: Open Pro/DA questionDave Hickey
Jan 24, 2004 10:49 AM
It's called radial lacing and it's nothing to worry about. It's very common on front wheels.
re: Open Pro/DA questionblakester
Jan 24, 2004 11:39 AM
yeah, radial, that is teh term I coudn't remember. So why what is the difference and why are some front wheels done like this?
Lots of reasonscollinsc
Jan 24, 2004 2:09 PM
Some good, some BS.

What you really should concern your self is why is your front Dura Ace (key point here) hub laced radially. Shimano hubs are not warrantied for radial lacing. Though I, and many others, have no fears of broken flanges, it seems terribly odd that the bike shop would actively void your warranty on a part.
You'll be fine!Uncle Tim
Jan 24, 2004 2:31 PM
The DA/ OP combo makes a very strong, dependable, wheel. Not the lightest or flashiest thing in the group, but they are adequate for all kinds of riding, even racing. If you get dropped, it's not because of your wheelset.

The big advantages to this combo is the traditional spoke count (if you break a spoke you won't be forced to walk home) and the normal depth of the rim (you won't have to worry about valve length). I've always thought that claims of increased aerodynamic advantage to deep-dished rims are overrated, at best.

Radial spoking on the front wheel is done mostly to save a few grams. By lacing radially, you can use spokes that are just a little bit shorter, so you save a miniscule amount of weight. The front wheel isn't subjected to the chain drive forces (i.e. it just rolls) so crossing spokes isn't vital to the strength of the wheel.

I maintain that the radial spoking is done mainly due to weight-weeniness and aestetic concerns. Some people think the radial spoking looks cool. I don't get it.

The sacrifice comes in the form of lateral wheel strength that is added by crossing spokes. That means that when you take a corner in a hard lean at at speed, the tension in the crossed spokes carries the forces better. Less tension in the spokes over time means longer wheel life.

Me, I am a fan of 3x crossing on all sides of both wheels. They look good and it is a tried and true method. Why try to improve on perfection?

At 150 lbs., you have nothing to worry about in your radial spoked wheel, provided it is built correctly.