 My lbs has these (or something very like them) going for fifty quid (that's the only link I could find on the subject) - machined out of one block of aluminium, startlingly low weight. I wonder how long they'd last....?
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 In the thread on the link it lasted 2 rides 
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 Shifting might be a pig as I'd be suprised if they machined in the chain lifting grooves.
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 I've got a TA aluminium cassette in the shed. It didn't wear out in two rides but I took it off as I couldn't put up with having to change down two and up one.
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I've just remembered the Campagnolo one too. That did a few thousand kilometres on the road and was otherwise identical to the steel one of the day.
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 I'd like to see that cassette after a really muddy wet ride.
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The plot thickens...I popped by the bike shop and the owner says it's titanium; it certainly looks like ti, although I'd assumed it was aluminium because it was made in one chunk. There are also at least some shifting ramps - front and back. So - did anyone have one of those crazily priced SRP ti cassettes back in the day, and how did THEY last? This one is scarily light - it doesn't feel right when you pick it up, the hand-eye-brain thing doesn't work. According to Poshbikes, ti cassettes wear badly - but they do a custom coating service.... There's got to be a demand for these with you weight weenies - they're so light I could bring back a suitcase of the things!
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 Price (New cassette supplied fully coated): From £320.00 HAHAHAHAHAHAHAHAHAhahahahahahahahahahahahHAHAhhahAH............ ....breathe breathe....... ......ahahahahahahahahahahahahahahahahahahahaha Forgive me, £320.00 to save about 100grams? Not even i'm that crazy.
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But that's my point! I live in China, and the shop here has them for fifty quid...... I've emailed Poshbikes to see how much the coating would cost.
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tis true - if you could offer em cheap then maybe theres a market there - but i reckon they would have to be close to 100 quid.
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The titanium cogs on D-Ace and XTR cassettes last really well IME.
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 Same with the ones on Record.
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I think I'm going to end up buying one just out of curiosity.
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