Rigida rims were softer than their competitors rims in the 80's but they were the lightest clincher rims out there. Bicycle World did a real world survey and measured the 13/20 700C at 419grams versus 480 grams for a MA-40 which is an excellent rim though 15% heavier. I like the Rigidas and still use them. I weight 157 lbs, the secret to these rims is to run wider tires. I would not ride these with narrow 19-20C tires the rims need to be protected from impacts. I ran the old 25C specialized(actually narrower than that) on these rims and have had good service. Brian in Berkeley
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