Anyone swapped out the rotors on the Simano M615?? What have u gone for?
I went with the magura storm rotors,180 front and rear, worked really well but I needed more cooling so I went to the zee brakes instead with the same rotors.
I did bump up the rotors to 203 front and 180 in the rear. Stuck with SLX rotors for the winter but will go ice tech when the weather gets better. I did go for XT M8000 for the brake upgrade.
I did 203mm Icetech rotors and finned resin pads on the stock brakes before going to Zee brakes. The Deores are awesome. Same power, feel, and modulation as XT with the only difference being the tool free reach adjust and a couple grams of weight. The first actual performance upgrade would be the Zee or Saints which offer much more power and better modulation along with longer pad life.
I loved the finned resins and 203mm Icetechs with the stock brakes. Better modulation than the metals and I could never get them even close to fading. Power, fade resistance, and modulation were all improved. I was very happy and only upgraded out of boredom and the fact that I do lots of 8,000' descents all the time. The Deores worked fine even for my 240lbs and huge descents but the Zees gave much better modulation, the pads last more than twice as long, in fact, in the year I've had them I haven't worn out the resin pads, not even close, and one finger is all that's ever needed. The Zee brakes don't affect rotor temps, reduced rotor temps come from larger rotors and Icetech rotors that cool much quicker between brake applications as do the finned pads. Just wanted to point out that heat related issues are usually a rotor size and type issue. The Zee calipers help slightly in reducing the amount of heat that gets to the fluid but that's it.
Back on topic, the stock brakes with finned pads and larger Icetech rotors should be all anyone could ever possibly need. Just the larger rotors alone make a nice difference in nearly every way. The difference is substantial.