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PSA Hayes dominion ...
 

PSA Hayes dominion A4 brakes £95

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I'm using Magura MDR-P floating rotors (2mm thick) on mine, with the sintered pads. Hoping the Uberbike race matrix reappear in stock soon.

Good solution to the barb/llive situation is to use Uberbike fittings as they're all reusable:

https://www.uberbikecomponents.com/category/436/Hydraulic-Replacement-Fittings


 
Posted : 15/05/2023 11:23 pm
doomanic reacted
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Anyone using the Hope 2.3mm rotors?


 
Posted : 16/05/2023 12:19 am
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Next question; has anyone used a SRAM hose instead of the supplied Hayes hose? There have been reports over on EMTB Forums of people experiencing difficulty threading the Hayes hose through the chain stay and frame of the Kenevo SL.

I asked;

Anyone using the Hope 2.3mm rotors?

I got the following reply from Hayes;

We recommend a max thickness of 1.95mm and a min of 1.75mm for best performance.

2.3mm will be a tight squeeze and we would not recommend that.  2.0mm should not be an issue.

Hopefully that information may be of use to someone.


 
Posted : 16/05/2023 6:06 pm
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good you are getting replies from Hayes, seems they may be increasing support etc for UK.

Re. your question on hoses, and I may have also answered this (kinda on emtb forums) - not used SRAM, but have used Shimano. Shimano were new hoses, so no mineral oil contamination. Banjo is the same as Hayes, used the above mentioned Hayes shaped olive/barb and a Shimano nut. 6 months and 1500km, no issues.

SRAM banjo was different design. and I didn't want to have to faff with fitting new Banjos as there was enough bodging going on without adding more opportunities for incompetence... 🙂


 
Posted : 16/05/2023 6:14 pm
doomanic reacted
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I'd expect 2mm rotors to scrape for the first few rides. It's tricky to align the calipers even on 1.95mm rotors.

Hayes hose is 5.4mm (SRAM is 4.9mm), it wouldn't fit in the hose clamp on my Pike.


 
Posted : 17/05/2023 1:30 am
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I'm using magura 2mm rotors with no problems . Those grub screws make things far easier to set up. My only slight irk is that when I have to take front wheel out to mount in a fork mount rack it can mess with ailment when wheel is refitted. I use a little wegde to keep pads apart in case I press brakes when loading bike onto rack so might have a look at that.


 
Posted : 17/05/2023 9:23 am
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I bought the hayes D series discs cheap from CRC. They're advertised as 2mm. Not had any problems with them rubbing and they seem to work nicely.

The stock pads are okay, but not really adequate for me. Got som Galfer pros coming which should solve that.


 
Posted : 17/05/2023 3:14 pm
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If there's an unbutchered set of these sitting around waiting on a return, I'd be interested in buying them 🙂


 
Posted : 21/05/2023 10:00 am
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So had a weird one today. Had a hose detach itself from the brake lever when I got the bike out the van. Thought user error when fitting the barbs into the hose. Gave the other hose a tug and that detached as well. Got home and took them apart and fitted 2 new barb / olives. These also didn't grip into the hose and could be totally removed by hand. I expect the olives I bought from ebay are too thin to grip into the hoses.

So next step. Get in touch with hayes and try to get proper olives etc?? Or is there a supply in the UK. I can bang my old brakes back on but I really liked these.


 
Posted : 21/05/2023 2:30 pm
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Did you do the nut up enough to deform the olive?


 
Posted : 21/05/2023 3:49 pm
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Ye I'm pretty positive. But the even if not the barb seems too thin. Can be inserted and pulled out pretty easily by hand.


 
Posted : 21/05/2023 3:54 pm
dc1988 reacted
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If the olives were adequately compressed it would have gripped the hose so hard pulling it out by hand would be pretty hard/impossible.

So the question is - are they undersized?

Got any pictures of the used/unused parts?


 
Posted : 22/05/2023 11:01 am
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Ill post up some later when i can. I'm hoping it was user error and i am just being a nugget :0


 
Posted : 22/05/2023 2:02 pm
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Hopefully this image works OK. Both the olives were crushed but obviously not enough to grip the hose properly. Good chance I didn't to them up properly. Never had this issue with brakes before and I have fitted loads.

Olives


 
Posted : 23/05/2023 10:35 am
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What adaptors are folks using for a 220mm front disk? I've found out tonight that the Magura adaptor (QM45) fouls the caliper.


 
Posted : 23/05/2023 11:30 pm
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If anyone is on the fence with these and want to sell them on i would really like a second set for my hardtail.

Thanks all


 
Posted : 26/05/2023 1:16 pm
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What adaptors are folks using for a 220mm front disk? I’ve found out tonight that the Magura adaptor (QM45) fouls the caliper.

I'm using the Uberbike adapter on my Fox 180s. Works fine.


 
Posted : 26/05/2023 1:20 pm
dc1988 and doomanic reacted
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Update, stock rear pads gone after 50 hours may have got a few more hours but was in Dunkeld and didn't want the hassle of changing pads on the trail. Did start mucking about with the modulation by unscrewing the one under the lever to get them a bit more like my Guide re (RSC lever) due to locking up wheels more often due to increased power. Then sort of got used to the power and screwed them all the way back in as they were when they arrived.
Front catches a bit due to taking front wheel out to putting in bike rack but otherwise all good.
What pads are you lot running ??
Need to look at some longer lasting ones.


 
Posted : 07/06/2023 1:16 pm
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The black semi-organic ones do indeed not last very long. The bronze Hayes sintered T100 last longer, provide even more stopping power, but take a **** load of bedding in and howl a bit when hot.

They are also quite pricey.

Been using Galfer Greens, which are pretty damn good. For cheap, the nukeproof ones are OK.


 
Posted : 07/06/2023 3:03 pm
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Theres not an especially wide choice after market. I'm 2/3rds through the black semi organics whilst waiting for my Galfer greens to arrive. I have some standard Galfer's as a back up, but what I really want is Uber bike or Galfer to make some Ebike compound pads for them, because I find the existing a bit weak at my weight. Unfortunately, neither do presently.

EDIT - Now I've reminded myself and looked again, BikeInn have Galfer ebike pads, if anyone is after them.


 
Posted : 07/06/2023 3:57 pm
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Is anyone using one of the Peacemaker clamps with I-Spec EV shifters? Do the clamps work well?

I believe they were initially only compatible with earlier I-Spec I/II shifters, so I'm interested in how well they work with the EV spec stuff.


 
Posted : 12/09/2023 4:39 pm
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I effectively had the same problem as @mactheknife. The generic olives I purchased on eBay didn't fit properly. I noticed the issue due to one of the brakes leaking. When I gave the other a fairly gentle tug, it completely detached too.

I concluded the issue was with the Olives, which are not the same dimensions as the official parts from Hayes.

I reached out to Hayes support, highlighting that there were no UK based retailers where you could purchase the official Olives. They kindly sent me a couple of service kits.

  • Insert and Olive 2-Pack: part no. 98-39471
  • Brake hose with banjo kit:  part no. 98-36138-K001

If you search on these part numbers, you can find a few European sellers, and Mech Monkey in UK seem to have them in stock 🙌


 
Posted : 12/09/2023 4:47 pm
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Is anyone using one of the Peacemaker clamps with I-Spec EV shifters? Do the clamps work well?

I just got one attached to a bike I bought. Appears to work very well with the I-Spec EV shifter, shame they don’t make one for the left to fit my dropper lever to. I know it has a fair bit of left/right adjustment but can’t remember if/how much rotational adjustment there was. How you get on with one will depend on where you like your shifter in relation to the brakes though.

I have just bought a Formula clamp (which I am hoping will fit the Hayes brakes) for my dropper lever, may fit it this evening. I like the tidyness of everything on one clamp, I wasn’t actually having a clash with separate clamps.


 
Posted : 12/09/2023 5:04 pm
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PXL_20230912_165656158.MP_Original


 
Posted : 12/09/2023 7:09 pm
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PXL_20230912_165723071.MP_Original


 
Posted : 12/09/2023 7:10 pm
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Pics (on previous page) show Peacemaker I-SpecEV mount from front and rear.  Left right adjustment is built into the shifter and a good amount of to/fro rotation allowed by the Peacemaker.

For anyone interested the Formula clamps are a non starter.  Sticking a 4mm bolt through a 5mm hole I’d have chanced but the holes appear to be further apart and the clamp meets the brake without clamping the bar.  Back to a separate clamp for the dropper lever


 
Posted : 12/09/2023 7:16 pm
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Finally got around to fitting mine after the front Guide failed on a ride. Again.

IMG_6188

IMG_6189

Uberbike 2.0mm 220mm rotors and spacers with the Dominion calipers. I did the front on Saturday as it's easy and the improvement over the Guides is phenomenal. The rear was more of a challenge and I had to drop the motor in the end to get the hose fed through the frame. I've used the bar clamps that came with my and my buddy's AXS conversions for the shifter and dropper lever. I was looking to get some Peacemaker clamps until I saw the price!


 
Posted : 12/09/2023 8:36 pm
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After 3 months of riding these, I'm happy to say they've presented no problems at all and are, with Galfer e-bike pads installed, my new favourite brake.

They feel lovely and I immediately notice the difference when using my other bike with shimano Zees.

BUT. After 10 minutes all the differences are forgotten and I just get on with the riding.

The biggest difference is the galfer pads. Apart from a nicer lever actuation, actual braking performance on the stock organics wasn't as good as Zees with uberbike e-bike pads.

So the question for me now, is how will Zees feel with galfer e-bike pads? I'll know soon enough since I now have some waiting in the wings...

Make of this what you will!


 
Posted : 13/09/2023 7:39 pm
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Galfer Es are awesome (possibly too good) on my son's Saints.  Can't imagine the Zees will be any different.


 
Posted : 14/09/2023 12:13 pm
 FOG
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Am I the only person who doesn't find Galfer pads amazing? I have tried them in two different brakes and while I certainly can't say they're bad, they aren't any better than some other, cheaper brands


 
Posted : 14/09/2023 12:57 pm
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I find the Hayes Sintered absolutely rock solid, and Galfer greens about on a par (but more easily available). I did not find the ebike ones as good.

However my old riding buddy, same build as me, similar bike, Hayes Dominions, same lack of skill, finds the galfers complete mince. I find that odd!


 
Posted : 14/09/2023 1:06 pm
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@bobolous do you have an email address you contacted as I am struggling to find anything?


 
Posted : 15/09/2023 6:25 pm
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Am I the only person who doesn’t find Galfer pads amazing? I have tried them in two different brakes and while I certainly can’t say they’re bad, they aren’t any better than some other, cheaper brands

Surely that depends on the compound you've tried? For example, I'm entirely ambivalent to their standard black organics, probably because I'm too heavy to get the best from them, but the e-bike pads are quite splendid.

I suspect theres a fair amount dictated by ones riding style and preferences too tbh.


 
Posted : 15/09/2023 6:42 pm
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I contacted them via the support portal on their website:  https://hayesbicycle.zendesk.com/hc/en-us

This got picked up by someone in USA who then passed it to the European team (in Germany I believe).


 
Posted : 15/09/2023 6:52 pm
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