Dura-Ace brakes 9100 vs 9000

[Keith A]

Quick question. I thought I read somewhere that the 9100's rim brakes had more clearance than the 9000's. Does anyone know if this is true? If so, any idea how much difference there is?

TIA.

[Blown Reek]

According to Shimano, the max rim width for both the 9000 and 9100 series rim brake is 28mm. Don't know if that helps, though.

[Wunder]

Can't speak to those but I have 6800 and 8000 Ultegra calipers which are basically an identical design. The 8000 definitely has a more open arch that more easily clears a large labeled 28 (measured 30 or 31) than the 6800. It's not huge but if your frame otherwise allows the 2nd gen 11 speed caliper should give you an extra 2mm of clearance or so. This really only matters at the margins though where you are trying to fit a measured 31mm tire under a short reach caliper brake and your frame is optimized for that.

[Keith A]

Originally Posted by Wunder

Can't speak to those but I have 6800 and 8000 Ultegra calipers which are basically an identical design. The 8000 definitely has a more open arch that more easily clears a large labeled 28 (measured 30 or 31) than the 6800. It's not huge but if your frame otherwise allows the 2nd gen 11 speed caliper should give you an extra 2mm of clearance or so. This really only matters at the margins though where you are trying to fit a measured 31mm tire under a short reach caliper brake and your frame is optimized for that.

Thanks for the information. Yes, I would assume that the 6800/8000 difference would be the same as the 9000/9100.

[prototoast]

I measured a few of my calipers (6800, 9000, 7000, 8000). The limiting factor on both comes around the pivots. On the first gen (6800, 9000) I measure the minimum gap at around 32mm. On the second gen (7000, 8000) I measure the minimum gap at around 35mm. So it seems like there is a slight advantage to the newer gen calipers, but it's pretty small.

[Keith A]

prototoast -- Thanks for checking this!

[robt57]

Unorthodox, yes. But I have J/B weld DIYed rear Breezer dropouts [4mm] and added a longer reach fork & BR-650 calipers for more fat tire greed with success. It also shortens the effective RD hanger length, be aware.

Caliper wise, I think BR-5800 are good candidates. No part of the caliper hangs lower than the center at the attachment as I recall. Not even lower than the fork or brake bridge...

[NHAero]

Originally Posted by Keith A

Quick question. I thought I read somewhere that the 9100's rim brakes had more clearance than the 9000's. Does anyone know if this is true? If so, any idea how much difference there is?

TIA.

Can you say which clearance number you're seeking? I have 9000 series on the Firefly and could take a measurement if helpful. Rims are Easton R90SL.

[oldpotatoe]

Originally Posted by Keith A

Quick question. I thought I read somewhere that the 9100's rim brakes had more clearance than the 9000's. Does anyone know if this is true? If so, any idea how much difference there is?

TIA.

Yup, a hundred more...
Sorry, just some lame humor after reading thru some of the current threads. Geez, seems people are pretty uptight these days, even about toys.
Tis the Season, I guess.

[ryker]

Originally Posted by Keith A

Quick question. I thought I read somewhere that the 9100's rim brakes had more clearance than the 9000's. Does anyone know if this is true? If so, any idea how much difference there is?

I haven't read anything like that. The closest I can remember is Alberto Contador preferred 9000 brakes with his 9100 groupset. His concerns related to on-the-fly adjustments rather than clearance, however.

[BdaGhisallo]

Originally Posted by ryker

I haven't read anything like that. The closest I can remember is Alberto Contador preferred 9000 brakes with his 9100 groupset. His concerns related to on-the-fly adjustments rather than clearance, however.

It was the traditional quick release on the 9000 calipers that he wanted so that he could open the rear brake when climbing to account for flex in the rear wheel. With the 9100 qr, it is either fully engaged or fully off.

[Keith A]

NHAero - Thanks for the offer. I'd like to pick up some brake calipers for a 91xx group and was curious if there was much difference between the 9000 and 9100 ones.

oldpotatoe - That was funny.

ryker & BdaGhisallo - Thanks for that info.

[Gabe77]

There is one diff between 9000 & 9100 (and 9200 since they are identical) - the spring tension adjustment still exists on the 9000, they did away with it on 9100. The clearance looks the same to me, both have so much you can run any tyre that will fit on a racing bike. 9000s have a release that is much easier to operate with gloved hands in the wet. I'd say the prior one is actually technically superior.
Prediction - 9200 will be the last rim braked DA ever. This is the only DA series brake that is identical to the previous series, all prior have had redesigns & improvements. Shimano have put in zero development into this component - likely because it will not be continued in production.