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zr 9000(11 posts)

zr 9000Frictionless
Oct 3, 2003 9:49 AM
i know that Trek's Zr 9000 alloy is new, but has any heard of its supposedly durability? I'm curious about its resistence to corrosion.
I'll let you knowFatnslow
Oct 3, 2003 9:53 AM
I should be able to tell you before too awfully long. My Klein's made out of it.
re: zr 9000No_sprint
Oct 3, 2003 10:03 AM
I've got a 2001 made out of it. I like it. It's a QPro with Record 10 and carbon tubies. Weighs in at 16 lbs on the dot. No corrosion.
I've had mine about a year , no problems.TNSquared
Oct 3, 2003 10:09 AM
I sweat very heavily and have salt built up on my zr9000 frame all the time. Salt is supposed to be fairly hard on aluminum, but I have no corrosion at all, not even on the headtube where the paint has been rubbed off by the STI cables or on the inside of the headtube or seat tube.

I believe zr9000 is a Trek proprietary alloy, and they use it for their nicer aluminum bikes. I know Trek is not a particularly sexy bike, but I don't think they put out anything that is not high quality, especially in the upper-middle and better product range.
Not really that new...russw19
Oct 3, 2003 10:10 AM
It was actually an alloy developed by Fisher for their mountain bikes. It is what the Fisher Platinum series frames are made out of. They started using it in either 1999 or 2000 (not 100% sure which one) and all it really is, is a proprietary alloy of aluminium. It has all the usual alloying elements plus Zirconium (hence the Zr 9000) designation. There are a few other things in there and the exact recipe is a closely guarded secret (see "proprietary alloy" above) but it's durability is not an issue. They have been making super light high end mountain frames out of it for about 5 years now.

It's "Almighty Trek's" ace in the hole...Fatnslow
Oct 3, 2003 10:28 AM
When it comes to aluminum bikes.

Incidentally, has anyone checked out how incredibly thin the ZR9000 tubes are on the roadbikes. I can actually flex the down tube with my thumb.
You must thumb wrestle alot.......TNSquared
Oct 3, 2003 11:36 AM
the downtube is not that thin, or at least mine isn't. I don't see how Trek could risk a lifetime warranty on those frames if they were. Light - yes, thin - yes, but they are pretty darn strong too. When my seatpost is not in, I clamp the workstand to the seat tube and I haven't seen any flex in that case either.

Of course, we may be talking about different frames and year models, but mine just is not that flexible.
Trek MTB's use itdgangi
Oct 3, 2003 8:26 PM
From what I know, Trek has been using ZR9000 alloys on their mountain bikes for quite some time. I have a Trek 8000 MTB made with the ZR9000 alloy and it's held up fine so far. In fact, this frame has taken an incredible beating over the years (including some really bad crashes) and there is not one single dent on the frame - no broken welds, no cracks in the tubes...nothing. Trust me - I've tried to break that bike.

Trek builds very durable frames. They are one of the only vendors who back them up with a lifetime warranty. And they have a good reputation for backing up their warranty should something go wrong.

Not Fisher's. Gary Klein developed the alloy recipe.Tig
Oct 4, 2003 4:07 AM
I was lucky enough to ride with Klein a few years ago right before the production ZR9000 bikes started making it to the showroom floors. He played with the alloys a bit on paper and took a big risk by having a huge lot made without actually testing it first. The rest is history, and Trek started using it across their domain of owned companies.

Klein started making bikes after his MIT project was a successful aluminum lightweight frame. Cannondale liked the concept and manufactured their version of the bikes, adding them to their existing clothing line. Gary is one smart man!
ZR9000 with carbon rear triangle??mbakercad
Oct 3, 2003 12:15 PM
Anyone have opinions on the '04 frames that have the Zr9000 bonded with the carbon rear triangle? It is 2xxx series bikes. I see a lot of frames using the blend of materials, I just worry about the bond losening over time. Any thoughts?
re: zr 9000TNRyder
Oct 3, 2003 2:25 PM
I have a Fuel with the zr9000 frame. It is very stiff and strong and have had no problems with any type of corrosion. If I remember the material that I read before buying that bike, the zr9000 alloy is supposed to be more rigid (less flexy) than a tube made from other alloys.