Glad you figured out why the fluid wouldn't flow in; that would have made me crazy. As ever, you're the guy, Luke. 🥖🥖

I would just like to point out that you have a unique thirst for finding, investigating and solving issues with bike components that most "pro mechanics / assembly operatives" do not have or wish to use these days! The enthusiasm is contagious! There is still hope! 🥖

This is like Sesame street for cycling adults. Every episode im learning something new.

Not sure how a nylon washer would fare with respect to heat build up, but you can use a copper washer - they can be found in many different diameters and thicknesses. Copper is softer than aluminum, so it shouldn't damage the caliper - copper washers are widely used in the automotive industry as crush seals between aluminum parts. As always, awesome video and I'm so glad that you produce videos more frequently now. 🥖 🥖 🥖

Guaranteed quality content as always - smashing it mate 🥖

5 out 5 🥖 as always. The hose issue had me yelling at the screen, "why did they design it like that" I would never have figured it out, I think, so chapeau to you sir.

Sorry Luke, thread derail, but I noticed in one of your other build videos with hydraulic brakes that you cut the hose to length, installed the clamping nut, spike and olive, then assembled it into the lever. This is really tricky as the chance of cross threading the clamping bolt is high and aligning it to screw in is difficult. Try this: cut the hose to length, install the spike, then install the clamping bolt loosely into the lever with the new olive inside. Then push the hose in and tighten the clamping bolt. Jobs a good'n.

A couple options: 1)Feibang sells replacement pistons that might work. 2) I'm not sure about using nylon washers as they have a low crush load and may fracture, I'd look at ceramic (mica) washers or copper.

Just want to say your technical knowledge and ability to review parts has really come along, whilst keeping the casual jovial delivery style. Well done on going up a gear (pun intended) and think you are showing the decision to do this full time is sound. Also feel you have a good groove in doing the budget line of bike stuff which in this increasing insanity of mainstream bike prices is very much needed. Cheers

Ahhh yes… the old ‘hidden washer’. What a thoughtful gift 😉

You make some of the best reviews out there. I love how every time you find a problem, you dig deeper to find the source and figure out a solution. Very few people do that these days. 🥖🥖🥖

Lived in Brill for the first 14 years of my life. loved going down those hills but hated going up! ended up living in Derbyshire so it was good training for the dales! now live in Newcastle and compared to both Brill and Derbyshire, it dead flat! good job as I’m now in my 60's and hills are harder than ever! Good video, as they always are. Thank you.

Great videos as always! I would definitely replace the steel washer with nylon ones or even better Teflon. Best regards from a German viewer!

I'm sure you can find a small aluminium shim the right thickness to replace the washer. Cut up pieces of cassette spacers could work to provide enough of a stand-off. 👌

Love your videos Luke. Easily one of my favourite cycling KZfaqrs. You seem the most relatable, informative and all round genuine guy. Have some baguettes 🥖🥖🥖🥖🥖

the week has been saved!!! Kudos to the homework done on the patent , these brand should be paying you for these product reviews! savages that ride mountain bikes :D:D:D:D:D the attention to detail is brilliant with the wear on the anodised area. the explanation is clear and unbbbbbbbiased, thats why we love your work! love watching the passion and the funnies, the shout out shows support to the local community, does youtube content get better? 🥖🥖🥖🥖🥖🥖🥖🥖

Love you Trace keep up the good work!

generally speaking, if the hose compression nut is the se thread pitch and diameter, you can simply screw any line into a lever or caliper. The oliv being brass it will conform and seal once tightened properly. Basically you could have simply unsrew the LTwoo caliper and bolt the existing hose into the zrace caliper.

I'd love a channel like yours for mountainbiking. Awesome vid!

The washer is to align the piston, keeping the pad centered. There was probably a machining issue with the caliper body or with the piston depth and this was just an easy fix.

🥖🥖🥖🥖🥖 top video again Luke, sadly I won't be changing my Hopes just yet. I'm actually off the the garage right now to see if Hope just leave a washer floating around behind the piston...😂 Love your determination to solve these problems you encounter and I love seeing stuff in bits!

Great video Luke, we're pretty new to the channel but really enjoy your content. I was wondering if you'd considered getting those brake pads analysed by a local asbestos company? As although the "wonder material" has been completely banned in the UK since 1999, China still use it. Might be worth getting them checked incase your breathing in anything nasty. Although it will make them excellent at dealing with heat of course 😅. Keep up the good work 👍🏻🥖🥖

You could glue the washer to the back of the piston, stop it jiggling around. 🥖 🥖 🥖

Really loves your expression during the "savages" bit. Keep the good work, i really love your content. Also mandatory 🥖🥖🥖

Luke my dude, great video. Regarding the metal washer, I believe the nylon would avoid corroding the aluminium but will probably give a squishy feeling, or affect baguette efficiency. Anyhow, stay safe 🥖

thanks for the review. I tried to buy calipers for postmount from them - they could not send it in 2 weeks, which saved me from this wonderful quality.

Absolutely loving the more frequent content 🥖🥖

I would put the piston in the lathe, and step it down a tad, to have an "oil-surface". 0.2mm is more than enough

🥖🥖🥖🥖🥖 Fantastic. As said by others, the extra mile you put in here will save people's minds from blowing up!!!

Can you fit a small allen key in the bleed port all the way down to the olive/hose port? If so, do so, set the hose in place and then take the key out and bleed the system

Would have been cheaper, quicker and lighter to ride without your smartphone; but more entertaining? Absolutely not! You're the reason I'm a competent home mechanic, just don't let velorexia get the better of you Luke 🥖🥖🥖🥖🥖

Nice bit of hands on investigation. Always a pleasure to watch 🥖🥖🥖🥖

this green colour looks fantastic!

Well done on fixing the olive fitting installation,they seem like good brake calipers,hope they fix the production fault.

I have a bar+stem combo from OG-Evkin, about 15.000km on it and still good as day 1, I'd say to try getting a set from them especially to match the frame on the bike! :) Only issue was the internal routing of the bar, my mechanic said he just couldn't make the bends and ended up routing it outside (it's just the bar and the bike is not full internal, so all good..)

Love how deep you can dive just to review things

Nylon washers sound like a good idea, they look like pretty good callipers bar the small asterisks

You could have careful cut part way through the olive and then used a screwdriver to twist and snap it off. I've done it many times on my Ultegra. Ultegra hose isn't cheap.

Have my issues with Zrace and their quality control. Have had their mechanical disc brakes and their crankset and both had issues. Found the disc brakes with no documentation. Even when you used their stated torque settings in time the screw hole stripped. You had to constantllt asjust the cable as the pad wore. The pad wore quickly and since I needed to replace the back calliper, it just made sence to buy new callipers. I went with ONIRII Hydraulic Disc Gravel Road Bike Brake and have no regrets. Do not have to contsantly adjust the brake cable. Their cranks, had an initial problem where the crank shalf was not done to spec and was too short. The seller replaced it to his credit. Now I see this issue with the washer as further evidence. I just might get the fully hydralic disc brakes but would give one of Zrace's chinese competitors a first look.

the thread on the hydraulic cable caliper mount screw looks way different then the "normal" cable end on the splitscreen bit... this body looks like it has been made on a 3d milling machine or with water pressure🤔 great tech guys!!🥖🥖🥖🥖🥖🥐🥐🥐🥐🥐🍷🍷🍷🍷🍷🍷🍷🍷🍷and any good bagetté needs a good wine people"😂

like a groupset detective !

Would ceramic pistons from another manufacturer fit?

Learned how to build a bike watching your videos. Thank you 🥖🥖🥖🥖🥖

A silicon o-ring maybe or put a nylon washer is a must as it won't damage the metal

Great video as always , those calipers are pretty tasty 👌 you must live pretty close to me , would be cool to see you riding around and see the bike builds in person 👌🥖🥖🥖🥖🥖

The insert (barb), olive and hose should be flush with no hose sticking out the end. When installing the barb, the hose bulges somewhat and should hold the olive in place. Then when fastening the hose nut with the assembly gently butted against the shoulder within the caliper, all should become crimped correctly. SRAM introduced threaded barbs and olives to ensure correct assembly, see SRAM hose fitting kit!

got me some Og-evkin stuff, got the steam and handlebars for my new build :)

Looking stylish in the Siroko gear Luke 👍👍

Nylon washers is a good idea but maybe the aluminium will skuff them up into the oil so i think it might help to get something with a wider diameter that wont be able to move about so much.

Just use a o-ring the same OD of the washer in that caliper. Most o-ring rubber is safe inside braking fluids & it'll not chip nor mar the threads. 🥖🥖🥖

I'm surprised they didn't implement a snap ring design, instead of the washer for spacing. 🥖🥖

Washer to keep oil free moving so doesn't cause a force suction the oil sticking it to the flat side of the piston we have the same sort of thing in auto levelling fmin resin 3D printers it's to let the oil flow back level in the caliper if it didn't it would just stick and lock up! Very hard to explain in a comment but hopefully you get the idea? We have flat build plates that push down on the liquid resin but at the start of each print it'll rise to leave an air gap for the resin to flow back in place and it'll come down and press the liquid again the film but its all to avoid force suction of the oil getting stuck to the flat side! You probably tried to pick money up in the wet it gets stuck to the floor with the suction from water

Our man always delivering TOP tricks and ideas to upgrade or bikes 🥖🥖🥖

Bro, I got a similar model from Liipro and I just realized that when I trigger the brake, the caliper opens a little bit due the lack of structure, so the brake will never completely work properly, also the rotors will be damaged due the pads not be in the proper contact, so be sure that when you press the levar the caliper don't move in the internal side of aluminum block.

Im faaar from the person that would go through what you do, and even if you do it for me, I still wont touch it with a long stick. BUT I love your videos and look forward to them every week.

3D printed shims would work a treat, and also let you tailor the shape! BAGUETTES FOREVER

Great vid! That washer is very strange. How thick is the rear face of the piston? Could you cut a shallow groove across the piston to allow oil flow and break the potential suction effect? Would save you maybe 5g 😂 🥖🥖🥖🥖🥖🥖

🥖 🥖 🥖 The washer could also be used as a volume spacer, so you would have enough fluid for when the pads wear. 🥖 🥖 🥖

Thank alot luke..

Would buy a Siroko jersey in the Trace Velo colours, make it happen! 🥖🥖

I would replace the washer with nylon ones - for dat dere weight saving.

Try replacing the metal piston with a ceramic piston, so you can ditch the metal washer

No better feeling when you get the better of a problem product eh!

Nice video as always, disc brakes aren't for me , I will continue with rim brakes as long as I can

Washer behind the piston classic fudge especially as the mating gave was flush. The washer and galvanic corrosion would be more of a concern rather than the loss of anodisation on the monoblock of the caliper. Extra weight but for something that light is it really a problem? The hose length into the caliper is a handy thing to know thank you. 😊 . Fair play you found it though. 🥖🥖🥖

Top tire quality investigative video! I love this type of content

Great job... You're testing, investigating and solving so we don't have to 😂👍 keep up the great work Luke 😊👏👏👏🥖🥖🥖🥖🥖🥖🥖🥖🥖🥖🥖🥖

you are a master in solving the problems of these ali express components. but not everyone is like you ...

I wonder whether the zrace has copied the hope caliper to the point that ideally you should use the hope type olive, and nut assembly as its quite unique. I have hope RX4s on a bike and the fitting is unique. I'd need to have a close peek at the zrace.

I was actually thinking of using the 4 piston version on my MTB... Because shiny. Little disappointing to hear of the pistons leaking, so I'll stick with SLX for now.

This video is the reason why I use with pity at all those recent newbies which by those super expensive overcomplicated hydraulic disc brake dead weight cra[ supposedly solving problems I never noticed during decades of riding road bikes even at time when they where not fancy.

about the washer - it looks like it's better to replace pistons or make some shanels fot oil on the pistons to prevent siking. Like on sram ones

Very helpful having already bought them and about to install. Cheers. 🥖

this is an amazing video. thanks for your hard work!

halfords sell zrace brakes under the "clarks" brand, they look to be heavily inspried by hope calipers and trickstuff maxima levers Clarks CRS C4 aka Zrace M1 X2/X4

Interesting thoughts around the washer - nylon is a good choice for preventing metal particulates, though it will compress more than a steel one (shouldn't be a problem as you only need a small gap) and it needs to be compatible with the oil - DOT 4, the older oil that used to be common was pretty nasty on plastics, I'm not sure what mineral oil would do to it. Might be fine, might start to dissolve it slowly. Just some thoughts! Great video as ever but I do miss the comedy intros 😢 Have a bonus duck. 🥖🦆🥖

Test it without the washer, and let's us know if it had any loss of performance. Great video 🥖🥖🥖🥐🍞

Like thank you for your shows have bought my first item from alie express

I have the mountain bike zrace m1 X2. They're great.

🥖🥖🥖🥖🥖 for the Baguette King, did you ever get around to testing and reviewing the JuinTech brakes ? I thought you had a pair to test a while ago

Great video, as always you're Luke 😊I wonder if the Hope RX4 is more similar to this brakes 🥖🥖🥖

So, beside from the weight benefits, is there any braking performance improvement?? Or the L-Twoo calipers were already quite good?

The problem is not the caliper. Instead, the olive and the nipple are not working well. There are several different olives for different cable/housing sizes.

@0:50 wait wheres the dada dadada bo shabo sha boda bondondonba music? AKA the intro theme.

🥖 i wouldnt use a washer like that, if its pinned between the housing and piston it could trap an airbubble

I got my 1st piece of siroko clothing, bib shorts very impressed..nice bit of discount too..🥖 do think it would be possible to do a comparison on brakes , different discs and pads , so many out there ..what’s gives the best performance for your money.. Cheers Dave

You are worried about 100 or so grams. Clearly, you're not a 20 stone bloke on a road bike. I am, and that's after 24000 miles. Liking the content ❤

Hey Luke, when you described what to do before sticking the olive-d line in, what did it look like before you stuck it in? That part gets cut off in your demonstration. (Baguette)

As always awesome and very informative content. Watching your content its like you preparing to watch movie at your house you make food, drinks and make yourself comfy 🥖🥖🥖🥖🥖

I don't know why they have to have hydraulic hoses between the lever and the actuator. Surely they could have a force sensor in the lever, communicating wirelessly with a hydraulic pump on the caliper, powered by solar power paint on the frame, or woven into the lycra…

12:23 I appreciate that comment 😂, we are indeed savages with our brakes 🥖🥖🥖

Excelente video como siempre, respecto a la arandela del Caliper, quizás una arandela de teflón ya que el teflón se caracteriza por tener baja fricción, ser incomprensible, y tener exelente resistencia química, se que resiste bien el calor, pero no sé si resistira tanto como para el calor que se genera dentro de los calipers, tengo pensado comprar este conjunto, muchas gracias por tus vídeos y saludos desde Chile, haces excelentes videos.

Some old hope 2 pot mono mini had space washers for modulation and bottom out as you show, ta stay safe

teflon washer would be ideal 🥖🥖

Review the 12 speed electronic groupset

Looks like the washer is used to keep the piston from being pushed into the caliper to far when bleeding.

I can easily lock up my wheels with rim brakes, just do not see the point of disk brakes on a road bike. On my mtb disk brakes work perfectly, but do tend to over grab when not careful with the lever pressure. Rim brakes on a road bicycle are lighter, have plenty of stopping power, simpler, and never fail. I believe disk brakes on a road bike are trying to solve a problem, that does not exist. The one thing that disk brakes do better, is make the manufacturers more money.

you could probably 3d print some adapter plates to reduce the weight of the L-TWOO mounting plates. I would go with nylon washers. Steel and aluminum definitely do not play well together. 🥖🥖 Also not being a weight weenie, 100g difference is not really a major deal in my book to worry about this stuff, I could give up ice cream if I care that much. LOL.

Nylon washers indeed sound like a solid choice. Will get rid of a gram or two as well 😜🥖 ( as long as nylon is compatible with the fluid, chemically )

I bought these and the calipers didn't seem to have 2 holes for the fluid, just one. anyone else?