Those weights are a surprise to me! I thought the older rims all weighed in at 500 grams or so since my MA40/MA3/E2's hit that number. That's less than 1 ounce from what you got Jerry, which is scale error or production variance. I'm not surprised about the weight of the Rigida, however, since I had some durability problems with them.
For what its worth, the non ceramic Open Pro is supposed to weigh 425 grams. When I get back in town Wednesday, I'll weigh one of mine and post the results to the List.
By the way, Listmember Jeremy works at a shop which has a large number of Rigida 1320's in 27" size for a very attractive price.
Rick Chasteen, Kansas City
> Rick Chasteen wrote:
>
> > Mike, et al:
> >
> > >>>>>>>If you compare a Super Champion, Rigida, or MA-40 clincher from
the
> > '70's/'80's, you will find current clinchers are much lighter and
> > stronger.>>>>
>
> I didn't think this was the case, so I pulled some rims out of the attic
and
> weighed on a kitchen food scale. A modern Mavic Open Pro Ceramic weighs
470gm.
> A Mavic MA2 is just slightly heavier at 485 gm. The recently discontinued
> Ambrosio Gentlemen, which I think is essentailly the old Super Champion
> Gentleman, is 482gm. A Rigida 1320, however, is noticeably lighter at
440gm.
> Conclusion, modern clinchers, at least the widely used Open Pro, are about
the
> same weight as the average old clinchers and heavier than the Rigida,
which is
> the clincher rim I most commonly see on 70's era bikes set up for racing.
Note
> that the Rigida I weighed was a 27", so I'd think a 700C Rigida 1320 would
be a
> little lighter, at least 10gm probably, so for the same size the Rigida
would be
> about 40gm lighter than the Open Pro. Not a huge difference, but
noticeable.
> What is a huge difference is that between any modern rim and even a medium
weigh
> old tubular rim. A Super Champion Arc-en-Ciel, which was not considered a
very
> light rim in the 70's, weighs 340gm on the same scale, 130gm less than the
Open
> Pro.
>
> Regards,
>
> Jerry Moos