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  1. #1
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    Hope Rotor, Shimano 2012 XT compatiblity?

    Title says it, I am currently working on getting parts for my dream bike. I want to get Hope 2 piece float rotors (specifically:04'-mini,X2,M4 160mm) coupled with the newer XT M785 hydraulic brakes. Does anyone know if there is a compatibility issue?

    (I did a search for this but had no luck)

  2. #2
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    Quote Originally Posted by Guerdonian View Post
    Title says it, I am currently working on getting parts for my dream bike. I want to get Hope 2 piece float rotors (specifically:04'-mini,X2,M4 160mm) coupled with the newer XT M785 hydraulic brakes. Does anyone know if there is a compatibility issue?

    (I did a search for this but had no luck)
    I have the HOpe saw rotors and M970 XTR calipers on one of the bikes. Works fine.

    The rivets won't rub on your caliper anyways, it's more of the fork/wheel/brake adapter setup I'd be worried about. Worse case scenario, you have to take a bit of material off from somewhere.

  3. #3
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    Quote Originally Posted by Guerdonian View Post
    Thanks for the reply. Yea i read a bit of that on a few other threads, i would rather not have to take a file to anything if possible. Setup would be Sunringle Black Flag Pro 29er wheels, Fox F-29 Fit RLC 2012 fork, and a Custom Form Cycles TI frame. I will have Paragon sliding dropouts for the rear, and a post mount adapter for the fork.

    Thoughts?
    You won't know until you try it It's no biggie to file a bit of material off the brake post mount adapter/brake caliper. I say go for it.

  4. #4
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    Quote Originally Posted by macming View Post
    I have the HOpe saw rotors and M970 XTR calipers on one of the bikes. Works fine.

    The rivets won't rub on your caliper anyways, it's more of the fork/wheel/brake adapter setup I'd be worried about. Worse case scenario, you have to take a bit of material off from somewhere.
    Thanks for the reply. Yea i read a bit of that on a few other threads, i would rather not have to take a file to anything if possible. Setup would be Sunringle Black Flag Pro 29er wheels, Fox F-29 Fit RLC 2012 fork, and a Custom Form Cycles TI frame. I will have Paragon sliding dropouts for the rear, and a post mount adapter for the fork.

    Thoughts?

  5. #5
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    The forum search is still broken.

    The combination of a Hope floating rotor, Shimano brake caliper and Fox fork will work. I had to file some metal off the brake caliper to increase clearance though. The brake rotor rivets were extremely close to the caliper.

    Pictures of Hope floating rotor clearance with Shimano brake caliper
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    Full thread:
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    In terms of performance I wasn't very happy with the combination. My front brake with a Hope 183mm floating rotor never felt as strong as the rear brake (160mm Powertap rotor) on descents. Every ride the fork and brake caliper were coming back covered in brake dust. I replaced the 183mm Hope floating rotor with a 180mm Shimano RT-86 Ice-tech rotor which has been far more successful. The front brake feels consistently stronger and pad wear has reduced significantly. The Shimano rotor has fewer cut outs in the rotor and seems to work better with Shimano brake pads.

    Love the new 2012 XT brakes

    .

  6. #6
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    Quote Originally Posted by WR304 View Post
    The forum search is still broken.

    The combination of a Hope floating rotor, Shimano brake caliper and Fox fork will work. I had to file some metal off the brake caliper to increase clearance though. The brake rotor rivets were extremely close to the caliper.

    Pictures of Hope floating rotor clearance with Shimano brake caliper
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    Full thread:
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    In terms of performance I wasn't very happy with the combination. My front brake with a Hope 183mm floating rotor never felt as strong as the rear brake (160mm Powertap rotor) on descents. Every ride the fork and brake caliper were coming back covered in brake dust. I replaced the 183mm Hope floating rotor with a 180mm Shimano RT-86 Ice-tech rotor which has been far more successful. The front brake feels consistently stronger and pad wear has reduced significantly. The Shimano rotor has fewer cut outs in the rotor and seems to work better with Shimano brake pads.

    Love the new 2012 XT brakes

    .
    This is EXACTLY what i was trying to search for. It didn't even show up in the google mtbr search i did, dagnabbit.

    To bad about the decreased performance wear issue. The stuff i ride here in colorado tends to have steep decents, so i am re-considering this rotor. I haven't ridden the brakes yet, but got to "play" with a set at a shop and they felt spectacular, I particularly like the lever design.

    I was trying to up the bling-bling of the gold hubs by putting the gold hope rotors on the bike. Does anyone have suggestions on a better performing 2 piece gold rotor? i have done quite a bit of looking, and it seems the Hope's are the only option.

  7. #7
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    That's interesting. I have the saw rotor paired up to a XTR/Saint M810 caliper, and they work just fine. Granted I haven't ran a Shimano rotors for a few years, but it's hard to imagine the braking performance to get much better.

    I also have two sets of Hope M4s, for which I'm obviously running the saw rotors with them as well.

    Maybe your particular rotor had contaminants on it?



    Quote Originally Posted by WR304 View Post
    The forum search is still broken.

    The combination of a Hope floating rotor, Shimano brake caliper and Fox fork will work. I had to file some metal off the brake caliper to increase clearance though. The brake rotor rivets were extremely close to the caliper.

    Pictures of Hope floating rotor clearance with Shimano brake caliper
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    Full thread:
    XT BR-M785 Disc Brake with any 6 bolt rotor?

    In terms of performance I wasn't very happy with the combination. My front brake with a Hope 183mm floating rotor never felt as strong as the rear brake (160mm Powertap rotor) on descents. Every ride the fork and brake caliper were coming back covered in brake dust. I replaced the 183mm Hope floating rotor with a 180mm Shimano RT-86 Ice-tech rotor which has been far more successful. The front brake feels consistently stronger and pad wear has reduced significantly. The Shimano rotor has fewer cut outs in the rotor and seems to work better with Shimano brake pads.

    Love the new 2012 XT brakes

    .
    Quote Originally Posted by Guerdonian View Post
    This is EXACTLY what i was trying to search for. It didn't even show up in the google mtbr search i did, dagnabbit.

    To bad about the decreased performance wear issue. The stuff i ride here in colorado tends to have steep decents, so i am re-considering this rotor. I haven't ridden the brakes yet, but got to "play" with a set at a shop and they felt spectacular, I particularly like the lever design.

    I was trying to up the bling-bling of the gold hubs by putting the gold hope rotors on the bike. Does anyone have suggestions on a better performing 2 piece gold rotor? i have done quite a bit of looking, and it seems the Hope's are the only option.

  8. #8
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    Quote Originally Posted by macming View Post
    That's interesting. I have the saw rotor paired up to a XTR/Saint M810 caliper, and they work just fine. Granted I haven't ran a Shimano rotors for a few years, but it's hard to imagine the braking performance to get much better.

    I also have two sets of Hope M4s, for which I'm obviously running the saw rotors with them as well.

    Maybe your particular rotor had contaminants on it?
    Possibly the rotor was contaminated but the same rotor had worked fine for over a year with my previous Hope Tech X2 brakes beforehand. I think that the rapid pad wear and braking performance with the Hope floating rotor were linked. If you look at the Hope floating rotor it has more slots in than the Shimano rotor, making it more abrasive. My guess is that the slots in the Hope rotor were shredding the Shimano brake pad when the brake was applied.

    Most of my rides involve a few road descents with big stops where you're threshold braking from 40mph+ down to 13mph or less. That sort of braking gives the brakes a good workout. Because there's plenty of grip 90-100% of braking is done with the front brake. These were the areas where I felt that performance with the Hope brake rotor was lacking. The front brake didn't seem to bite and it took a firm (increasingly desperate) squeeze on the brake lever to get the bike stopped from high speeds. Definitely not what I had in mind!

    Pictured below: Typical braking during a road descent. 43mph to 13.5mph. This particular descent has traffic lights on so I often have to slow right down or stop if the lights are red.
    Attached Thumbnails Attached Thumbnails Hope Rotor, Shimano 2012 XT compatiblity?-hard_braking_road_descent_16-10-2011.jpg  


  9. #9
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    As the conversion of my Powertap hub to a 142x12mm axle isn't going well I've been using a spare wheel instead for the last few days. My spare wheel has a Hope 160mm floating rotor fitted. I've currently got a Shimano 180mm RT-86 Ice-Tech rotor on the front wheel and then a 160mm Hope floating rotor on the rear wheel.

    Used with my Shimano XTR M988 Trail brake the 160mm Hope rear rotor on descents feels a lot like the 183mm Hope rotor did on the front - down on power and requiring a bit more finger pressure than normal. It's also a bit noisier with a faint buzzing sound when braking.

    The Hope floating rotors work with the Shimano brakes (it isn't a dangerous combination as you can still slow safely) but it wouldn't be my first choice of rotor to use with the new style Shimano brakes either. I've done 11.5 hours with the Hope rotor on the back so it should have bedded into the pads by now.

  10. #10
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    I replaced the rear Hope 160mm floating rotor with a Shimano RT-86 160mm Ice-tech rotor today. The bike now has Shimano RT-86 Ice-tech rotors front and rear. The change in rear braking performance was quite noticeable with the rear brake feeling strong, well matched with the front brake and requiring less lever pressure than it had with the Hope rotor.

    I was quite pleased to have the brakes working well today. The weather was nice for the first few hours but then I had to ride through a wintry storm on the way home. There was a wall of black cloud ahead and no way to avoid it. The final descent was soaking wet in freezing cold pouring rain. It was fairly grim but at least the brakes were good.

    Although the performance was good I wasn't very happy with how true this 160mm Ice-tech rotor was. The brand new rotor was quite badly warped out of the box. It took me 30 minutes to get it straight enough to ride with, even then it was still rubbing lightly on one brake pad.

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