RS685 Weight?

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morrisond
Posts: 1323
Joined: Thu Mar 25, 2004 8:34 pm

by morrisond

Does anyone know the weight of the new Rs685 Mechanical/Hydraulic Shimano Disc brake shifters/brake levers?

efeballi
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by efeballi

Rose Bikes says 954 g for RS685 (http://www.rosebikes.co.uk/article/shim ... aid:742883) and pair of RS785 calipers. Pair of RS785 calipers weigh 284 g (http://www.bike24.com/p293387.html) so that's 670 g for the shifters.


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climber8
Posts: 102
Joined: Fri Oct 29, 2010 6:10 am

by climber8

not sure if it helps, but my R785 (di2/hydraulic) shifters came in at 508g for the pair. (that is 248g more than 9070 di2 shifters!)

my calipers -- BR-RS785 (not the BR-R785 calipers) -- came in at 262g for the pair.

maxxevv
Posts: 2012
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

Would there be weight savings by pairing the shifters to XTR disc calipers ?

Edit:

Ok, the BR-M9000 disc calipers are supposed to be 91g each. So that sounds like pretty substantial savings if you pair them over the R785 / 685 calipers.

climber8
Posts: 102
Joined: Fri Oct 29, 2010 6:10 am

by climber8

maxxevv wrote:Would there be weight savings by pairing the shifters to XTR disc calipers ?

Edit:

Ok, the BR-M9000 disc calipers are supposed to be 91g each. So that sounds like pretty substantial savings if you pair them over the R785 / 685 calipers.


i have the m9000 calipers. when i weighed them before installing i believe the savings was ~20g per caliper, not 50+ grams. there's some weird stuff going on with the quoted weights you see floating around, i think.

i have a set of just the calipers on order but have yet to receive them; they're not available yet. i'll weigh them again when i have them. don't feel like taking them off my MTB to re-weigh them now.

bm0p700f
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by bm0p700f

caliper weight (claimed) will not inlcude pads. You also have not included the weight of hoses.

If you want lower weight then a mechanical system will be lighter but the hydraulic system performs better.

MichaelB
Posts: 993
Joined: Tue Apr 22, 2008 4:31 am

by MichaelB

Just got notification that my set has shipped from Bike24 in Germany

:mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen:

I'll check the weights when it arrives.

Mind you, the 2014-15 Shimano Spec docs list the following ;

Shifters (L&R) - 649g (pair)
RS785 calipers - 284g (pair) - these are the calipers with the threaded hose fitting
R785 calipers - 271g (pair) - with Banjo fittings

No mention if the weights include hoses, cables, pads etc.

And no dimensions of piston diaemeter, especially masetr cyclinders :evil: :evil: :evil:

jeffy
Posts: 1325
Joined: Sun Oct 05, 2014 11:51 pm

by jeffy

for comparison

trp claim spyre caliper is 154g per wheel

will be interested in you posting weights when you get the shimanos.

bm0p700f
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by bm0p700f

Hoses are not in those weights. Given the weight of the system I am amased my wifes bike came out sub 8kg. You also have not included rotor weight, rotor bolts.

MichaelB
Posts: 993
Joined: Tue Apr 22, 2008 4:31 am

by MichaelB

Weights from my set are as follows

Right lever assy - 325g
Left lever addy - 323g
RS785 caliper & bleed block - 117 g ea
Finned resin pads + spring - 21g per caliper set
2700mm of hose - 52g
Set of olives, barbs & nut - 7g (per lever/ caliper assy)
Gear cables - 38g only (inners only)

So the weights from Shimano that I listed above are pretty close

As an aside, a M640 Zee caliper and non-finned pads come in at 151g per end ...

maxxevv
Posts: 2012
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

Thanks for the update. :thumbup:

foofighter
Posts: 94
Joined: Mon Oct 26, 2009 10:19 pm
Location: Norcal

by foofighter

How is the performance? Worth the wait/weight? Who's using 140mm rotors?

MichaelB
Posts: 993
Joined: Tue Apr 22, 2008 4:31 am

by MichaelB

Haven't installed it yet, as hub (Circus Monkey HDW3-R+) and other 11sp parts are arriving in the next week or so. Rear wheel to be relaced with new hub, then other bits can go on.

Going from a TRP Parabox with Avid X0 Trail calipers, so will be interesting to see how it feels.

jeffy
Posts: 1325
Joined: Sun Oct 05, 2014 11:51 pm

by jeffy

are all the component parts in the kit separate for install?

i.e. are the hoses attached to the calipers or shifters?

my confusion stems from the term "fully bled" being used (a likely misunderstood by me)

with UK braking being Right = Front and Euro being Right = Rear are the UK supplied Kits compatible with a Euro set up?

Sorry for the Dumb question.

... also i have not seen any packaging but apparently it is lovely? any updates from those who have purchased?

Pollekes
Posts: 3
Joined: Sun Nov 09, 2014 12:57 am

by Pollekes

My daughter is riding them for 2 months now on her new Ridely X-Fire.
Was a bit of a challenge to get the parts on time for the first Superprestige race of this season.
Got the shifters from Shimano Europe, but they didn't have the RS 785 calipers available, so I got these from Bike24 in Germany.
Bled them myself, since they came with black hoses and my daughetr wanted white :roll: and I had to guide them through the frame anyhow.
Setup is with 160mm front and 140mm rear.

I wouldn't recommend to use the R685 or XT calipers, since you might hit the banjo hose mount with you heel, while getting on and of the bike.

Brakes deliver great performance and are absolutely trouble free (so far). :)
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