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TRP Spyre C - upgrade housing or move to Shimano BR-RS785

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TRP Spyre C - upgrade housing or move to Shimano BR-RS785

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Old 07-10-18, 08:05 AM
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lukasamd
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TRP Spyre C - upgrade housing or move to Shimano BR-RS785

Hello,
I use TRP Spyre C with Ultegra 6800 shifters, Avid GS2 rotors, TRP pads and standard, non-compressionless housing.
They are ok, very comfortable because I have two wheelsets (one for road, one for gravel) but I can use full braking power only on drops - force is small when I have hands on shifters.
I used Avids BB7 before and they were awful in maintenance, but force was a little better.

Now I can move to ST-RS685 shifters and BR-RS785 hydro brakes, then can sold 6800 shifters na Spyres... sbould be very ok price but... It big change.
Will it better, or I should try compressionless housing with Spyres and/or also TRP rotors?
I'm very sceptic to hydros because of more difficult maintenance.
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Old 07-10-18, 08:13 AM
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Coiled square wire brake housing has been adequate, on brakes, for generations...
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Old 07-10-18, 08:25 AM
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Yep, but TRP recommends compressionless and many people say, that there is difference between standard and such housing.
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Old 07-10-18, 08:47 AM
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I've ridden some poorly set up spyres and the difference between my own set is major. I figure the Yokozuna housing that I built them up with makes a significant difference in feel, but I also noticed a very noticeable increase in power by switching out the stock pads. Altogether, I feel that braking power is very adequate and above the level of my 6800 calipers on my much lighter road bike.

I'm still on the lookout for a set of st-685/br-785's since I doubt there will be any new post mount road options coming from shimano in the future.
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Old 07-10-18, 08:54 AM
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How much is housing & bar tape? Why not try the cheap route first? TRP Spyres are pretty decent. Maybe following the manufacturers recommendation might be worth considering.
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Old 07-10-18, 09:37 AM
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Yep, so I wonder what is better choice. And if replace housing, what should I choose? TRP, or maybe jagwire KEB-SL?
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Old 07-10-18, 10:45 AM
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go for it then, ... rear the longest run ,
but physics of deceleration renders rear brakes less effective because weight shifts forward..

could go to pads from someone other than TRP.. too..

The Hy Rd is hydraulic entirely within the caliper.. cable up to there..
so EZ swap..
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Old 07-10-18, 11:08 AM
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Spyres are pretty good and they mate well with recent Shimano levers. I'd try compressionless housing and a careful setup. In the best case scenario they still won't feel as good as hydros. Hydraulic maintenance isn't really a big deal, particularly with Shimano. You replace pads as needed and don't need to adjust for pad wear. If the brakes feel a little mushy usually putting the bleed funnel on the lever with a bit of mineral oil and pumping the brakes will improve the feel. Every year or two bleed the brakes properly.-less than an hour's work even at an easy pace.
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Old 07-12-18, 02:30 PM
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Originally Posted by lukasamd View Post
Now I can move to ST-RS685 shifters and BR-RS785 hydro brakes, then can sold 6800 shifters na Spyres... sbould be very ok price but... It big change.
Will it better, or I should try compressionless housing with Spyres and/or also TRP rotors?
You're asking two different questions here.

1) Will it be better?

Absolutely. If you are at all concerned about the amount of hand force necessary to achieve maximum braking power RS785 hydros are head and shoulders above any mechanical disc brake. That's not to say there aren't some very good mechanical disc brakes, but I really think the people who claim they're as good as hydraulic brakes have either tried poor hydros or don't mind squeezing the lever hard. Some people even like to squeeze the lever hard. Hydraulic brakes aren't for them.

2) Should you try compressionless housing?

Again, absolutely. Compressionless housing makes a big difference and is the best bang for your buck here. If you want to hedge your bets, go to the LBS and get just the amount of housing you need for the front brake. Minimal risk. Also pay attention to how well your calipers are lined up with the rotors. You can make the brakes you have work really well. Don't spend the money to upgrade without making sure you've got the best performance you can out of your current brakes. Unless you just want to upgrade, in which case you should. It sounds like you kind of don't want to.

Originally Posted by lukasamd View Post
I'm very sceptic to hydros because of more difficult maintenance.
It's something new to learn, for sure. Getting them set up the first time can be tricky and messy, especially if you've never done it before. After that they're pretty close to trouble free -- until they aren't. Things can still happen. I had my pistons get stuck and broke one trying to force them to move. That was a mess and I had to buy a new caliper. Overall, I think I spent more time tinkering with mechanical discs when I used them. If you really wanted to try hydraulics, I would say don't let the maintenance dissuade you. If you're looking for a way to convince yourself that it's OK to stick with mechanicals (and obviously it is), this is as good a reason as any.
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Old 07-13-18, 10:22 PM
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Yes hydro will be better especially from the top of the levers. The only maintenance I have had to do to my hydro brakes was the initial bleed and loosen the 2 screws holding them to the frame to align them. IMO less hassle than the cable brakes I had.
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Old 07-25-18, 01:51 PM
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I decided to move to hydraulic, becuase had a good option to upgrade (to ST-RS685 shifters and BR-RS785 brakes). Also replaced rotors to new XT RT81 160 mm (my CX bike has 160 mm without any adapter).

First ride and... I'm really disappointed. In comparsion to TRP Spyre-C:

- Modulation is great, great, fantastic! It's much improvement
- Breaking power is... the same, or maybe a litte weaker? Don't know why...

I didn't mount new brakes and shifters, becuase don't like hydros and don't have all required tools. I ordered this to trusted bike service and everything is ok, but power in top of the levers is mediocre (on down is great). I'm also not heavy rider (about 72 kg) so... it's strange.
Maybe becuase of pads? I use J02A Resin with radiator from BOX.
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Old 07-25-18, 02:05 PM
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With new rotors and pads you'll need to bed them in a bit. Have you done that? Here's a link to a description: Art's Cyclery Blog Ask a Mechanic | Bedding In New Disc Brake Pads
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Old 07-25-18, 09:10 PM
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Originally Posted by lukasamd View Post
Hello,
I use TRP Spyre C with Ultegra 6800 shifters, Avid GS2 rotors, TRP pads and standard, non-compressionless housing.
They are ok, very comfortable because I have two wheelsets (one for road, one for gravel) but I can use full braking power only on drops - force is small when I have hands on shifters.
I used Avids BB7 before and they were awful in maintenance, but force was a little better.
Did you attach the Spyre's the same way as the BB7's with the cup and cone and washers?
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Old 07-25-18, 11:58 PM
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Originally Posted by Andy_K View Post
With new rotors and pads you'll need to bed them in a bit. Have you done that? Here's a link to a description: Art's Cyclery Blog Ask a Mechanic | Bedding In New Disc Brake Pads
Hm.. maybe it is the problem. I will check and bed them. Thanks!

Originally Posted by cobba View Post
Did you attach the Spyre's the same way as the BB7's with the cup and cone and washers?
Yes, I have used Spyres for few months and they were attached correctly.
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Old 07-26-18, 01:31 AM
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Originally Posted by lukasamd View Post
Yes
Are you saying that when you attached the Spyre, you did use the cup and cone washers that were used with the BB7?
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Old 07-26-18, 02:09 AM
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No, I mean I use all elements from Spyre BOX - not from BB7, All according to the official TRP instructions (except for non-compressionless housing)
Also, it doesn't matter now - I replaced Spyres by hydros and try to achieve the best results.
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Old 07-28-18, 02:43 PM
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upgrade the housing and get bigger rotors
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Old 07-29-18, 01:54 PM
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Let me tack on a question as I am probably about to buy some Spyre mechanicals. Do you cut compressionless housing with the same housing cutter or does it require a special cutter?
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Old 07-29-18, 11:16 PM
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Originally Posted by Paul Barnard View Post
Let me tack on a question as I am probably about to buy some Spyre mechanicals. Do you cut compressionless housing with the same housing cutter or does it require a special cutter?
It's like cutting derailleur housing except with a slightly awkward layer of fibers that may need cutting with scissors or a razor blade to clean it up depending on the sharpness of your cutters. But yeah, normal housing cutters. Good stuff, 100% worth it.
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Old 07-30-18, 12:50 PM
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Originally Posted by cpach View Post
It's like cutting derailleur housing except with a slightly awkward layer of fibers that may need cutting with scissors or a razor blade to clean it up depending on the sharpness of your cutters. But yeah, normal housing cutters. Good stuff, 100% worth it.

Thank you.
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