On Jun 4, 2020, at 6:05 AM, L DB <luca...@gmail.com> wrote:
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- Super slick brake cables: Jagwire elite sealed brake housing. On this note, I have noticed a greater gain in the brake performance with cables and housing that are super slick rather than the compressionless variety.
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Any amount of flex in the brake arms?
Not that I've noticed.
> On Jun 5, 2020, at 00:04, L DB <luca...@gmail.com> wrote:
>
> Thanks Ryan.
>
> Any amount of flex in the brake arms?
>
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On Jun 5, 2020, at 2:41 AM, Luca De Battista <luca...@gmail.com> wrote:
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On Jun 5, 2020, at 1:34 PM, Eric Daume <eric...@gmail.com> wrote:
I disagree, I’ve experienced lousy power from long reach Tekros with all kinds of levers: Shimano aero, Shimano non aero, Tektro, etc.
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the return spring is so light that you need to have very low friction in the cables to prevent the levers from rattling
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Re Paul Klamper disc calipers: Yes, there are now three actuator arm lengths. I suspect the standard road arm was designed for current 7900+ Shimano STI levers, which have longer cable pull and lower MA than older Shimano levers. The long pull option is non-controversial since Shimano established this standard with V-brakes in the 90s, and most people have adhered to it. The "Campagnolo" arms are presumably intended to match the v3 Ergopower levers, which have higher MA than current Shimano; v2 Ergos should be very similar, lever shape excepted, since I don't think the calipers which match v2 and v3 levers are different in any significant way.
If you're going to pair Klampers with some other non-V-brake drop bar levers then either the road or Campagnolo actuator arms might work, but which ones might be best will depend in the brake feel desired and the MA of the particular levers used; ideally one would try both arms. This also applies to matching levers with rim brake calipers; some trial and error when using parts not designed together would seem to be almost inevitable.
Later,
Stephen
1. Shimano 7 & 8 speed brake levers from 105SC onwards, including the current R400
2. All road STI levers with exposed gear cables, with the possible exception of recent low-end 8/9 speed ones; decoding Shimano's brake-speak is confusing
3. However, all of the recent 10 & 11 speed STI levers with hidden gear cables (starting with Dura-Ace 7900) use the more recent longer cable pull and lower MA; this is compensated for in the matching calipers. This can make braking power significantly and noticeably lower when used with older calipers, but probably helps with mechanical road discs.
Re 2 & 3 above: I don't know what Shimano have done with the recent Sora or Claris stuff, so good luck with those.
Later,
Stephen
After some research, some more context.
From the smallest to the highest cable pull:
1. Campagnolo
1. SRAM
1. Shimano SLR/super SLR everything from the latest 80s : 7 speed to 8, 9, and 10 speed shifters with external cables*
2. Shimano super SLR new 10 speed shifters with internal shifter cables
3. Shimano super SLR EVO. 11 speed shifters
* those three seems to share the same cable pull ratio...
The main difference between Campagnolo and old shimano seems to lie in the brake actuation : Campagnolo is progressive, so the harder you pull, the harder is squeezes
Shimano is degressive, so the harder you pull, the less is squeezes
Now, I wonder how all this fit together and how a progressive or degressive cable actuation can in practice influence brak performance...
In practice, most relatively modern levers and calipers *except* Shimano 7900+ should be compatible, but YMMV. This comment does not apply to everything pre about 1990, and certainly does not apply to Mafac or Universal levers (which are outliers).
Later,
Stephen
I've had exceptionally good braking performance with the R559s using the following setup:
- Koolstop e-bike compound pads
- Pads are about mid-height in the slot
- TRP RRL brake levers (to a comment above, since they are the same company they probably design the brakes and levers to a similar cable pull)
- Super slick brake cables: Jagwire elite sealed brake housing. On this note, I have noticed a greater gain in the brake performance with cables and housing that are super slick rather than the compressionless variety.
Hope this helps a bit,Collin in Sac
On Thursday, June 4, 2020 at 10:26:48 AM UTC-7, Luca De Battista wrote:Thanks. I am using compressionless outers and look stop salmon pads. They are a bit old so I can swap them for a newer pair that I have lying around.My brake levers be are campagnolo veloce 10 speed, ultrashift.On Thu, 4 Jun 2020, 16:12 Ryan Watson, <rswa...@me.com> wrote:I have Tektro R556 on two bikes, and have used them on many others. As far as I can tell, the 556 and 559 are identical.I have brazed-on Raids on one bike. And I’ve used bolt-on in the past.As far as absolute braking power, they’re the same to me. I seek out steep, twisty mountain roads and definitely put them to the test.I use the same red Yokozuna “Mathauser” style pads on both. The original pads on both the Raids and Tektros are terrible in my opinion. Definitely upgrade the pads on your 559s before giving up on them.The Raids look really cool and have better clearances, but it’s a constant struggle to keep them quiet. They squeal horribly unless adjusted just right with a lot of toe-in.The Tektros never make a sound and are easier to set up and adjust.Good luck!Ryan
Hello there,I have currently installed some Tektro r559 on my 650b conversion and the braking is OK...but not great. A few sudden stops during mythe last ride were very ...exciting to say the least.In the meanwhile I have found a couple of mafac raid, and I wonder if it is worth installing them (no brazing posts...yet)Now the question is : who has a direct experience of the two different brakes? How do they compare?If the mafac is substantially more powerful, I may consider installing them, otherwise I will probably switch to 700c tyres.Thanks,Luca from France
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