DA 9200 Disc Calipers on 8050 Ultegra shifters.

[PinaRene]

Does anyone know if the Older Ultegra Di2 shifters work with the new Shimano Dura Ace 9200 calipers. They seem to be a lot better with more space for the discs ! So I was thinking to upgrade the calipers on my own system.

[milanv]

Yes
viewtopic.php?f=3&t=170626

Can't find anything online or in the forum,

Wondering if you guys have any idea of the Newer 12 speed BR-R9270 calipers will work with the old 11 speed dura ace levers?

Can't see why not..?

Anybody tried this?

Yes, it is working very well, for example in one of my bikes.

Here you have many information about it from other people.
viewtopic.php?t=156208

Compatibility chart from Shimano
https://productinfo.shimano.com/#/com?c ... acid=C-499

[Conradsleight]

Just got a new Factor Ostro built with DA11 and am considering swapping the callipers as the front brake has been rubbing a lot.

Do people find the increase in clearance is enough to make brake rubbing rare?

[Hexsense]

Yes.
Pad clearance is increased because of more pad roll back.

More pad rollback require longer lever throw.
New caliper has re-optimized servo wave curve to cancel out that longer lever throw.
So, on all new combo: you get more clearance for free.

On new caliper, old lever: you'll have a tiny bit longer lever throw before the pad touch the rotor than with old caliper.

[Conradsleight]

Yes.
Pad clearance is increased because of more pad roll back.

More pad rollback require longer lever throw.
New caliper has re-optimized servo wave curve to cancel out that longer lever throw.
So, on all new combo: you get more clearance for free.

On new caliper, old lever: you'll have a tiny bit longer lever throw before the pad touch the rotor than with old caliper.

Gotcha, thanks. I edited my last message after you'd already sent your reply. Do you know then if the new clearance is enough to really reduce the chances of brake rub?

It seems like a very small increase, but then again the tolerances are tiny so maybe it's enough... I'm just hoping to eliminate the sound as I can't stand it when climbing...

[Hexsense]

My 8170 still rub a bit on the first few rides. But then it's good after about 6 rides.

When new, each piston doesn't retract consistently and equally when it gradually gets hot. For a few rides, I recenter caliper location after each ride to find it out of alignment after the ride. Eventually, it stop doing that and I've got consistent disc with no rub since. Finger cross.

[CR987]

Yes, I just fitted them a couple of weeks ago, no more rubbing when I get out the saddle. Definitely more pad clearance

[RadB]

My 8170 still rub a bit on the first few rides. But then it's good after about 6 rides.

When new, each piston doesn't retract consistently and equally when it gradually gets hot. For a few rides, I recenter caliper location after each ride to find it out of alignment after the ride. Eventually, it stop doing that and I've got consistent disc with no rub since. Finger cross.

Do you think it is the pistons or rotor, or both

[Hexsense]

I think it's the pistons.
Because it happen to both RT-MT900 (rear) and RT-CL900 (front) rotors.
And it stop doing that after a while. Without me adjusting anything to the rotor. Just keep re-align the caliper.

Maybe, I should have done piston exercise when building to bike to accelerate the set in.

[Mr.Gib]

On new caliper, old lever: you'll have a tiny bit longer lever throw before the pad touch the rotor than with old caliper.

This is the key. When you say tiny bit, do you mean barely noticeable, or perhaps 10 - 20 percent more?

[JaeOne3345]

I am running 9270 Dura Ace calipers with 8070 levers.

Everything works just fine. I built the bike back in June. 3000 miles on it and no rubbing, ever.

I also set up 8170 calipers for my buddy on his Aethos running the 9170 levers. Same. Everything runs great.

[PinaRene]

I am running 9270 Dura Ace calipers with 8070 levers.

Everything works just fine. I built the bike back in June. 3000 miles on it and no rubbing, ever.

I also set up 8170 calipers for my buddy on his Aethos running the 9170 levers. Same. Everything runs great.

And, also longer lever throw ?? Curious about that because I don't want my levers touch the handlebar.

[JaeOne3345]

I am running 9270 Dura Ace calipers with 8070 levers.

Everything works just fine. I built the bike back in June. 3000 miles on it and no rubbing, ever.

I also set up 8170 calipers for my buddy on his Aethos running the 9170 levers. Same. Everything runs great.

And, also longer lever throw ?? Curious about that because I don't want my levers touch the handlebar.

Not at all. I can't say I myself have experienced any perceived increase in lever throw. My levers do not touch my bars and neither do my friend's I set up. No where near close. To me it feels the same as any 80xx or 91xx series set up properly and bled right, just with no rub issues. I am even running slightly thicker SRAM rotors, and still no issues with rub.

Do the conversion. It is worth it.

[RDY]

Just buy Magura FM calipers. They're better than new DA anyway.

[Hexsense]

On new caliper, old lever: you'll have a tiny bit longer lever throw before the pad touch the rotor than with old caliper.

This is the key. When you say tiny bit, do you mean barely noticeable, or perhaps 10 - 20 percent more?

Very little change. Many won't even notice the increase.

I am running 9270 Dura Ace calipers with 8070 levers.

Everything works just fine. I built the bike back in June. 3000 miles on it and no rubbing, ever.

I also set up 8170 calipers for my buddy on his Aethos running the 9170 levers. Same. Everything runs great.

And, also longer lever throw ?? Curious about that because I don't want my levers touch the handlebar.

Shimano approve such combo to pass their standard. Lever won't even get close to touch the bar.