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lol, oops 

Anthony":x5u1bp58 said:It was called 925 because it's made of Tange Ultimate Ultralight, which has 0.9-0.5-0.9 top and down tubes - i.e., they're butted from 9 to 5. Similarly, the 825 was made of Tange Ultimate Superlight, which has 0.8-0.5-0.8 top and down tubes. So the difference is only in the butts and this frame is stronger and just fractionally heavier than an 825.
A 55cm c-c top tube is equivalent to a notional/horizontal tt of 57.5 or so and is usually reckoned to be a size for height up to 5-10, depending on taste.