Yeah they definitely weren't bedded in properly because when they were it was immediately obvious.
I just thought that because it's still 'winter' I'd save the green pads for warmer, dryer weather. I didn't expect to be riding in such nice conditions in February. I'm sure we'll get some foulness before too long.
I'm up north next weekend for family stuff so I might try for a few hours at Hamsterley otherwise it'll be 2 weeks between sessions and I've fully got the riding bug back.
appltn
I’ve cracked and ordered a set of Tech4 V4 to probably replace my Trickstuff Direttissimas
Interested to hear how they compare to trickstuff.
“Sounds like they weren’t properly bedded in”
It amazes me how big a difference this makes - I tend to ride around the roads dragging the brakes for a while and then do lots of stops with more brake dragging in between. Has to be in the dry so they get hot enough. Also, when ridden in the wet without being bedded in, they seem to get worn out in hardly any miles.
Interested to hear how they compare to trickstuff.
Respective bikes should all be rideable this weekend, and I’m relatively injury free so will give them all a semi proper go.
I’ve ordered black with silver reservoir caps but does anyone want to swap their silver lever blades for my black lever blades?
I can sell you some unused ones as I’ve already swapped to black? £20?
I can sell you some unused ones as I’ve already swapped to black? £20?
Yes please. I’ll dm you.
Interested to hear how they compare to trickstuff.
Me too! Unfortunately I’m nursing a broken hand since this time last week so it’ll be another 3-4 weeks before I’m able to try them 😕
Tried my mates Tech4 V4's yesterday on their maiden voyage, ..with 220mm rotors and the green pads they were too grabby....even with the red organic the stopping power is face melting. As a serial panic braker I'd have to go down to 200mm rotors or I would die.
Has anyone actually tried both the new Tech4 E4 Vs the V4? ...I might be considering these myself now..
Tried my mates Tech4 V4’s yesterday on their maiden voyage, ..with 220mm rotors and the green pads they were too grabby….even with the red organic the stopping power is face melting. As a serial panic braker I’d have to go down to 200mm rotors or I would die.
I've got 220/203mm rotors with the green pads on tech 4 v4's, had tech 3 v4's on 203/180mm rotors on the last bike.
I don't find them too grabby at all, just tons and tons of face melting power, on top of oodles of lovely modulation.
You'd get used to them after a few rides. My only complaint with the tech 3 v4 was that to get to the power they needed a decently strong pull, the tech 4 have the power more easily accessible.
E4 Vs V4, apparently due to the increased piston size the v4 will have a softer lever feel, but a bit more power.
The leaking pistons issue, is this something Hope are aware of?
I think my front has this - the last 2 rides the front brake has been honking like a flock of geese until it got a bit of temperature into it, rear is completely silent.
Checking this morning after a night ride yesterday, these are the pads - definite wetness at the top of one of them :
https://flic.kr/p/2oih9zh
One side of the rotor Vs the other:
https://flic.kr/p/2oiisra
https://flic.kr/p/2oih9yF
And the inside of the caliper on the corresponding side, all dry:
https://flic.kr/p/2oiisrf
The only thing I've put on the bike since it was built was some muck-off protect and shine and the closest that got to the front brakes was on the fork stanchions and definitely nothing on the brakes.
They're about 200km old.
Easy replacement by Hope, or do I need to go back to where I bought them?
Ok, yep I 100% have a bit of leakage from one of the pistons. The wonders of 4k mobile phone video!
https://youtube.com/shorts/PRvt_4sBLxo?feature=share
One of my riding buddies had to warranty one of his Tech 4s
Yeah I've emailed Hope, got a returns form so will get them to sort it out.
Brake removed and cleaned up and back in the box ready to go back to Hope.
I extended and pushed back the pistons to make sure the seal hadn't got unseated or something like that but any decent pressure on the brake and you can see the fluid just bubbling and starting to appear.
The stainless pistons are bloody brilliant though, I can push them back in with my finger - could never do that with the tech 3 pistons!
Whoever had the 'warbling' sound issue, you might want to check yours - mine started warbling before turning into a full on honk when they were cold. Obviously the disc be was getting very slowly contaminated over the course of a few rides.
So I wonder what the problem is :?. Is it the seals, the piston recesses,or the pistons themselves ?
If the pistons move very easily, could they be too small, in a tiny tiny way. But has to be something causing fluid to get out.
I'm kind of glad I've paired the new leavers with the last model V4 calipers, and was considering having Hope replace the pistons for the new SS ones. But until we know where the issue is, I think I'd be better holding off doing that
My Tech4 e4s have been faultless & leak free so far and they've been on the bike since the hopes came out
To be fair, it's a single piston out of 8 so it's probably just a dodgy batch of seals that got into some of the brakes. And judging by the few people that have had issues it's not that common.
Mine had 5 pistons across both calipers leaking out the box - some of them were like yours and leaking enough to pool on the pads. Hope wanted me to send them back, but I had some uplift days booked and no spare brakes so they sent me some seal kits instead.
Some of the seals were folded over (Im guessing the lip caught on the piston when it was installed). However, some of them were fine and still leaking, so I replaced all of the seals and no more leaks. Glad its fixed but pretty poor considering how much they cost.
My levers are also clicking, but they sent me some master cylinder pistons without asking so Im assuming its a known problem... Theyre brilliant when they work though!!
Well that was disappointing, I fitted the brand new Tech4 V4s and have leaky calliper pistons at both ends out of the box. I couldn't even get them to firm up and have a defined bite point, they just both pull to the bars.
I exercised and lubed the pistons before fitting them to the bike and my impression at that point was very positive, the calliper is quite large and has a much wider opening than the Direttissimas which made it really easy to work with the pistons. The pistons were super smooth and as others have said I could push them back with my finger.
All of the hardware and fixings seem very high quality and much more sturdy that on the Direttissimas. I think the quality of fit and finish is a lot closer than I remembered from the last time I had a play with the Tech4. I think that might have to do with this set being black anodised rather than silver which probably hides a bit of the difference.
Anyway, I've sent these videos to Hope and also Biketart where I brought them, hopefully it'll be resolved quickly because they do seem very nice otherwise.
https://www.youtube.com/embed/rEBxkWSXUH4
https://www.youtube.com/embed/POxKzSKV2kQ
Your vids are private.
Hmmm, interesting that all these leaks are on V4 callipers.
Anyone had similar issues with the E4? My E4’s have been faultless so far (touch wood)…
Your vids are private.
Oops, should be fixed now.
Hmmm, interesting that all these leaks are on V4 callipers.
Anyone had similar issues with the E4? My E4’s have been faultless so far (touch wood)…
The leak on mine was on the small piston which is the same one the E4 uses for all 4, so I think it's just coincidence tbh. They'll use the same seals/pistons for the E4 and V4 small piston.
Yes my issues were with tech 4 E4
Fitted Friday before a wkd trip to bpw last summer ,rear brake kept loosing pressure but thought if rushed the bleed,once inspected a found fluid bubbling from the piston
1. Returned to wiggle and swapped no issues
2.replacement arrived but the lever creaked like a 20 year old dark peaks gate
3. Replacement again from wiggle arrived and I was suspicious As the clearbag was holding fluid and by thispoinytge front had developed the same issue so I sent them both back
4. At this point i was convinced it was an issue with the same batch so ordered a completely different colour in v4 .........same story within a few miles loss of power and fluid leaking from pistons .
Sent them back for refund
Absolutely gutted as for the 10 minutes they worked they felt incredible
Genuinely gutted as I loved them but Jesus they need to sort there assembly out
Why did you choose a refund? What will you get that's as good or better?
I'm going to give mine a close inspection tomorrow. Theye were awesome last week but a bit spongy. Hopefully all I have is a little air in the system rather than a leak.
I haven't suffered any squealing or honking yet.
After issues with leaky shimano this thread has taken a turn for the worse at the point I’m looking to replace some brakes. Personally I’d take hassle free and no downtime over absolute performance everyday.
The Hope's appear to have absolute performance though and they're completely serviceable and rebuildable for their entire lifespan.
I'll take a minor inconvenience over throwing my brakes in the bin.
Whatever the assembly issue is I bet they don't hang around fixing it.
Inspected my e4s after reading this but mine are fine. Had them 6 months ish so hopefully if they haven't leaked yet they won't start doing. Front was making a bit of noise in the dry last week but that may be pad difference as I've got green front red rear.
That refund loop from wiggle is why mine went back to Hope, they'll rebuild it and make sure it's fine rather than just exchanging it for another one that might also have the same issue.
Only bought mine in September from Wiggle and Hope were fine dealing with it directly.
Fwiw, tech3 E4 here. Used the new hybrid pistons and tech4 master cylinders a few weeks ago.
Stripped the calipers and used new seals with no issues on the front. However, on the rear i forgot to lube up one piston, so when i thumbed it in one seal was damaged and it leaked.
Apart from that (and it was my fault), they are really, really good.
@sharkattack I chose the refund as 4 brakes seemed enough to convince me I'd given them a pretty good shot at actually working.
I'm not of your thinking that at £400 that should be labelled as a minor inconvenience .
What did I get thats better of as qood,well that's subjective as I've actually got some brakes that have actually performed flawlessly since I replaced the last pair of hopes,TRP DH EVO with 2.3mm rotors
Tbh I'm still gutted the hope brakes didn't work out as the lever feel when working is so light it helped my carpul tunel syndrome out no end .
@ta11pau1 I 100% agree mate but the first failure I thought that's a one off ,so paid again for a new one using my wiggle +
this meant I got a new brake the next day and then just awaited the refund of the faulty unit.
The second brake I didn't even get to find if that leaked as the lever had a creak so sent that back.
Then my third order arrived already with fluid in the clear bag from one brake, I'd then decided to try the v4 and when that didn't work out I think I was more than entitled to lose faith
Especially as I'd posted on the mtbr post with others having the same issue
I'm a massive hope fan but this put me right off
The product is Fantastic but I'm wondering whats going on in the assembly line .
Even silly simple stuff I had a pro 4 fortus 30 boost front wheel delivered last year with qr adaptors installed which they sorted quickly but that gets me thinking the people in assembly aren't bikers not that they need to be but someone should be on top of the qc a bit more and know boost 15x110 doesn't take qr adaptors
Qr boost is a thing, not common but it's found.
Wasn't a option they offered and don't think I've ever co e across qr 110 but don't doubt somewhere obscure it exists.
What is the metal looking bit on that seal damage photo?
Are new seals metal backed? If that's the case, how do you get them in?
Or is it a bit if swarf stuck on the seal?
I have had the issue sadly on E4 tech 4 ....first set was just the rear but second set both had the issue .
Second set also had the rear clicking lever .
Sent them to hope for repair then sold them .
Worryingly I've just received a pair of F22 in silver for my birthday and the first ride the pedal squeaks.
Removed it yesterday and the right pedal Bush wasn't seated correctly and no grease on the axle.
Not what I usually expect from hope
The Hope’s appear to have absolute performance though and they’re completely serviceable and rebuildable for their entire lifespan.
I’ll take a minor inconvenience over throwing my brakes in the bin.
I take what you’re saying completely especially the non disposable nature of it, but for someone like myself, time starved and without the skill, patience or time to undertake anything other than basic servicing, things like stripping a brake down and replacing seals pistons etc isn’t what I’d expect on a brake of any price let alone a premium product. I want fit and forget. I like the serviceability but with a view to getting many years out of them not fixing an issue within months.
What is the metal looking bit on that seal damage photo?
Thats the piston itself. plastic middle(ok its not actually plastic, but i cant spell phe.. 😆 ) with the stainless steel outer, its that outer bit you can see.
Are new seals metal backed? If that’s the case, how do you get them in?
According to the exploded diagram on the Hope site,the seals are the standard as before on the tech 3 X2,E4,V4 calipers.
This is the bottom of the new T4 piston, and its got either a chamfer or roundover on it, so i cant understand how it is catching the seal when being fitted.
Dyna-ti, eh, he's referring to the pic of the caliper with the piston removed from it, so your answer makes zero sense. I was wondering the same thing as onzadog.
Are we talking about this? I interpreted that as a hole pulled in the seal (and the seal twisted) so you can see the metal of the calliper bore behind it.
But the bore is anodised black with the rest of it. Looks to me like it's on the surface.
I sense theres now irony in the threads title.
Yeah that looks like swarf on the top of the seal. That absolutely shouldn't be there.
I sense theres now irony in the threads title.
I was thinking that. Shame to see all these issues as the reviews were so good. I do have a high level of confidence Hope will get it sorted though.
Does it? Looks like the inside of the seal to me as to the left you can see what looks like the silver continuing under the rubber and it looks like the rubber has been deformed away. I always thought the seals where just rubber though 🤷.
For balance, absolutely no issues with my tech 4 e4s that I’ve had on for a few months now! Not sure if I rate the green pads though, think the reds are a better all rounder
Does it? Looks like the inside of the seal to me as to the left you can see what looks like the silver continuing under the rubber and it looks like the rubber has been deformed away. I always thought the seals where just rubber though 🤷.
They are just rubber. As I said, that's swarf and not supposed to be there. It's a flat flake rather than a chunk but either way it's still going to impact seal performance.
I checked my E4's at the weekend and they're bone dry so hopefully I don't have this problem.
I know it's a bummer for those who have had to mess around waiting for replacements. Still though, of all the manufacturers to have an issue with I'd rather it were Hope than anyone else. I trust them to sort this out and everyone will be enjoying amazing brakes asap and hopefully for the foreseeable future. And I'm no fanboy, I've been very critical of them in the past.
How long have Shimano been churning out brakes with the famous wandering bite point? And Sram with the plastic pistons that get stuck when the sun comes out? 10 years or more, with no solution in sight?
