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^^ But if the rope was held at either end by school kids, the tension of the rope would be very little (more flex) than if it was rugby forwards at either end (less flex)?
It might still only need a toddler to tip the difference and win it, but if it was held at very consistently high tensions each end, it would be a very highly tensioned and well balanced battle of forces that exist in a successful wheel.
I realise that consistent tension has more to play than most things, but surely it's not the only thing?
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I genuinely am trying
That's true.
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Gah, no, thats not right either!
The rope doesn't flex (much).
NO!
So if 'flex' means 'bend under sideways loads' then a high tension spoke will flex less than a low tension spoke, and a thick spoke will flex less than a thin spoke of equal initial tension.
If initial tension is increased, spoke thickness becomes relatively less important.
If we're talking of flex as being 'bend under sideways loads', then the higher the tension would equal less flex.
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The solution to that problem could be
thickermore spokes in that side.ftfy
The whole notion of having an equal number of spokes each side is just another example of design inertia in the cycle industry. In the olden days, wheels were mostly symmetrical, since they had the same fixed sprocket threads on both sides, or very nearly so for the case of single-sided hubs. As multiple freewheels got an ever increasing number of sprockets, the dish in rear wheels got worse and worse, but in small increments. It's a kind of boiling frog problem. Now that the drive side flange is only half the distance from the centre of the non-drive side, the only sensible solution is 2:1 lacing. Anything else effectively has twice as many non-drive side spokes as it needs.
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If we're talking of flex as being 'bend under sideways loads', then the higher the tension would equal less flex.
We're not concerned with spokes bending sideways, since that only happens when you have a stick through the spokes and your problems are about to get much bigger. Rims move to one side under load, and it is spoke stiffness (resistance to being stretched, not resistance to being bent) which opposes this. Within the elastic strain region, the resistance of a spoke to being stretched more is pretty much the same regardless of how much preload it is carrying.
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Nope, because the spoke on the other side is pulling just as hard, so it's helping whatever external force is trying to move the rim sideways.
Seriously, read and digest Jobst, it's all covered in there. If you don't understand the maths, go and take some maths classes until you do.
The Bicycle Wheel: Amazon.co.uk: Jobst Brandt, Sherry Sheffield: Books -
Nope, because the spoke on the other side is pulling just as hard, so it's helping whatever external force is trying to move the rim sideways.
So... like a four way tug of war then?!
Also, if it's not under so high a tension, less of it's length is being 'pulled' through the rim, meaning it has that much more that can be 'pulled' sideways at the hub on all four sets of spokes...
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Slick up to the 46c Specialized (>30psi) runs excellent on standard rims (RS11&thelikes) - the Kojak 35c slick fails on steep velodrome banking at 30psi on R500&thelikes rim.
You can CX with 33c knobbies on standard rims, but you need to inflate them more than you enjoy to keep them from squirming in the grippy cornering on grass. Wider than standard rims would help you here.
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What's the optimum rim width for someone looking to use 28-38c tyres? currently using 24mm but feel I'd benefit from something wider.
You could go up to a 28mm external width rim with 28mm tyres. Assuming you're looking at 28C road tyres and 38C knobblies (not really CX, as they are too wide for UCI racing), you should be alright with 28mm rims. Going too wide on the rims with knobblies can be troublesome because the tread design will probably have been designed for a more rounded tyre profile. Past about ⅔ of nominal tyre width, you're getting experimental
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If you want to use 28-38 mm tyres, I'd say you want a touring rim, something in the Mavic range, something like 719. If you are on discs there is even more choice of lighter rims
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It's in your head. Jobst debunked the notion that higher tension makes stiffer wheels decades ago, both theoretically and confirmed by experiment. Going back to out tug-of-war, if the two teams are equally matched, it doesn't matter whether they are rugby forwards or national hunt jockeys, it still only takes a toddler added to one team to decide the match.