> The old MA2 is softer old technology material.
> The new aero type rims and materials are far stiffer and stronger so you can
> use less spokes and be plenty rigid.
> Look at all the 3 & 4 spoke wheels of today. Ted Ernst
> Palos Verdes Estates
> CA USA
I'd just add that the added stiffness of aero section Al alloy rims is not due to materials changes but the increased sectional area, which is why those aero rims are heavier as well. All post WWII Al alloys (and really all engineering metals, Beryllium notably excepted) have similar moduli of elasticity.