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  1. #1
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    Ice Tech Rotor Warpage

    This third time I've gone through an Ice-Tech rotor and it warped and I couldn't get it straight because the warpage was funky and all over the place.

    So I ordered a couple of RT-66s from JensonUSA. I read that the one piece design makes it easier to get them back in shape if they do warp. Plus, they are super cheap. Thoughts?

  2. #2
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    I haven't tried anything else. The 66s just work.


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  3. #3
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    I can confirm that after going down several steep hills over a few weeks, the RT-66s handle it much better. They seem to cool down or straighten-out faster on their own.

    To keep the rotors in optimal performance, I also use an alternating brake method - tap left, tap right, tap right - to keep them from overheating and it gives them time to cool down, then when I'm sufficiently slowed down, I squeeze on both levers until stopped. This is a general advice that was given to me in this forum as a technique when going down steep hills. Although it didn't completely prevent the ice-techs from warping, it did make it less severe, and in the case of the RT-66s, there's been no warping at all.

    Hopefully, this post will help someone who is having same issue.

  4. #4
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    I have also given up on the Ice Tech rotors and am having much success with the RT-66 rotors. The Ice Tech stuff may work well for someone, but that someone is not me.

  5. #5
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    OP, have you considered that maybe you need some bigger rotors if you're having issues warping them all the time? Curious how much you weigh and what size rotors you're currently running? I run the previous gen Ice Tech/2 piece rotors that only used a steel braking surface, not the alu sandwiched between steel the newest one do and even on the long 5+ miles descents I did in CO last summer I had no issues. I also when I went to CO where I knew there's be longer descents switched from my regular 160/180 setup to a 180/203 setup to handle the extra load and I only weigh about 185-190lbs geared to ride. On all my other bikes I run RT66s, can't say they work any better than the older IT I use on my main ride, actually I thinkI warp them easier.
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  6. #6
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    Quote Originally Posted by LyNx View Post
    OP, have you considered that maybe you need some bigger rotors if you're having issues warping them all the time? Curious how much you weigh and what size rotors you're currently running? I run the previous gen Ice Tech/2 piece rotors that only used a steel braking surface, not the alu sandwiched between steel the newest one do and even on the long 5+ miles descents I did in CO last summer I had no issues. I also when I went to CO where I knew there's be longer descents switched from my regular 160/180 setup to a 180/203 setup to handle the extra load and I only weigh about 185-190lbs geared to ride. On all my other bikes I run RT66s, can't say they work any better than the older IT I use on my main ride, actually I thinkI warp them easier.
    It is the sandwiched steel/aluminum/steel rotors that I avoid. If I did happen to tweak one of those, they have been pretty much impossible to tweak back into shape. I don't really need those kind of headaches when the RT-66 has been so reliable . . . . and costs considerably less.

  7. #7
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    i have 2 bikes one has icetech the other rt66 both 203/180 I will see how they do this season and try to remember to report back

  8. #8
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    I came to this section of the forum specifically looking for anyone else who has had issues with warping. I've had two sets of 180/160 IceTech rotors, and each has warped at some point or another. I've not very hard on my brakes either, especially the rear which sees very little constant use, only on/off at certain times.

    This most recent one is a 160 in the rear that's warped just enough to contact the pad in one spot while spinning - just enough to make an infuriating repetitive noise. I have given up on IceTech altogether, just ordered an RT66, and went up a size to 180 just because. Glad to hear that other people are going with those rotors also and that they're working well.

  9. #9
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    Have been using both, though more time on the RT66. Honestly haven't been able to tell a difference. I am not doing any serious downhill which is where the icetech may help. Haven't had any warping issues with either.

  10. #10
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    I've had the 6" rotors on my 29er race bike, including the front RT99 and I've been impressed with how they've handled heat on descents spanning several thousand vertical, despite being only 6". It's no DH rotor, but some of the races did include sections on DH trails where resistance to fade was hugely important.

    I also have some minimal AirRotors on my fatbike with the same brake calipers (M9000) and despite a 180mm front rotor, those things heat up crazy fast on an extended DH. We do a couple DH races on fat-bikes down ski-runs during the spring and I'm not going to race with those minimal rotors anymore, they heat up way fast and fade like crazy. The difference is pretty stark.
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  11. #11
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    Wow, just stumbled across this thread while browsing, so glad I did. I was on Magura brakes with one piece rotors for years, but switched to Shimano XT brakes with Ice Tech rotors about a year ago. They were great at first, I even used the word "flawless" to describe them. But as time passed, the front rotor started rubbing more and more, to the point that I could reliably predict when it would start rubbing on specific downhill sections of specific trails. I tried to true it, but being accustomed to the thicker, one piece Magura rotors, I ended up making it worse. Fortunately, I had another set of Ice Tech rotors so I just slapped a new rotor on the front. Time passes, rides happen, and the problem returns!

    For the record, I'm 160 lbs kitted out, riding a 26" wheeled XC bike with a 180mm front rotor. I'm going to try the RT-66 rotor in the future to see if it is less delicate. Again, so glad I happened upon this thread!

  12. #12
    Ride Fast Take Chances :)
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    I run the finned and non finned rotors. They will warp just like any rotor will. The ice tech ones tend to grow more when hot so a warped rotor will show itself more.
    With that being said they are as easy to true as any other rotor. Truing rotors is a skill worth learning

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