Originally Posted by
ppg677
Thanks folks. They are used, but show little wear. I noticed they are built without spoke washers, so seems like a rebuild with spoke washers would be in order.
Originally the Matrix tubular rims were shipped with washers. Because of the narrow channel inside the rim, they were rectangular rather than round:
Later, the washers were no longer deemed necessary.
I'm not actually sure they are 285 grams. I Googled "Matrix ISO tubular" and found something that said 285 grams. But I just found some spreadsheet on some "weightweanies" website that says they are 410 grams (which is more reasonable!).
I have several NOS unlaced Matrix tubular rims I use for stretching tires (they were rejected for defective anodizing). I should scare up a scale and weigh one...