Comedy Headset Service By “Aerospace Engineer” Hambini. 

3:05 white powder? for a minute I thought we were about to discover the source of Hambini’s weird erratic personality. A bit of Charlie

Thanks for the informative video on what not to do on a headset service!

Also, why did the compression plug have to come out, especially if your going to bash on the steerer? Leaving the compression plug installed at least means you're hitting metal and not raw unsuppored carbon. Also how he just keeps bashing it risking the compression ring to gouge into the steerer 🤦 Just a little tap to get some play and then push the steerer back up to release the compression ring from the bearing and the ring just slides off and the steerer drops. Also just clamp the seat post and tilt the bike down and that way nothing can fall anyways. I've never seen an "expert" litteraly get every step of the most basic maintenance task wrong 🤦

Another Hambini roast. Standard engineering practise is to grease any metal/ composite interface/threads. He may be an aerodynamicist or whatever as well as a plumber but not a mechanic I would trust.

You seem to like taking shots at him but as a point so does he to others. He puts his work out so it’s open to criticism, all is fair.

maybe the message of the video was "how to do it wrong"?😢

Wow, I like watching Hambini but this was painful. How can he do so many things wrong in what is a very simple job.

Just stumbled on this video, Reginald. Never seen the Hambini video before. I’d just like to say that the jury isn’t out! 😂 This is a genuine “how not to”.

Jesus, that is literally the worst mechanicing (if that's a word) I have ever seen!!! I have always been a bit suspicious of Hambini but this train wreck means I cannot ever take him seriously again!! I would honestly sack any mechanic working for me for practices like this! Thanks for highlighting this.

That video was gold dude... Looks like the aerospace oil imagineer got reamed !

The backwards brake pad is telling. As an engineer, I'm an electrical engineer, your job is ALL ABOUT DETAILS. Small details. Large details. All of them. The more critical the detail, the more attention you pay. If you're a good engineer, this mindset is ingrained into everything you do. If you're not a good engineer, well, you might mount brakes backwards.

There's one subtle issue glossed over in this video that is worth mentioning - the clamp bolts on the stem should be tightened and loosened incrementally, alternating between the 2 bolts, in order to ensure the loading on the clamp is reasonably even from top to bottom at all times. A quick thought experiment to explain why - If both bolts are initially evenly tightened and one is loosened completely, then the remaining tension (Which is more than the tension either bolt was carrying while both were tight) is carried entirely by the remaining bolt, leaving the bolt and more importantly the clamp loaded significantly more than they were when both bolts were tight. Similarly, when tightening the bolts, if you tighten one bolt up to the recommended torque and then tighten the second one, also to the recommended torque, the first bolt will now be loose. This is not mentioned even in the official instructions for installing a lot of parts with paired bolts on the same clamp, so you can follow the official installation procedure to the letter, using a torque wrench and still have a dangerously installed stem with a loose stem bolt afterwards. A scenario where this is even more important is on Hollowtech II crank pinch bolts, where the bolts are even closer together and in the much stiffer clamp at the end of the crank. It takes a little longer to tighten and loosen paired bolts like this (Especially on cranks where you usually have to spin the cranks 180 degrees for access each time you switch bolt), but at least you can be sure they are sharing the load evenly and the part is firstly clamping firmly enough to stay in place and secondly that the stress on the part is carried evenly across the clamp as per the part's design. Speaking as both a very well qualified mechanical engineer and someone who worked on and off for over a decade as a bike mechanic, that Hambini video is absolutely shocking from both sides of the fence. One trick I have seen, and even occasionally used, with GT85/WD40 is when MTBing in extremely muddy conditions is that spraying the downtube and chainstays with WD40 just before going out riding in thick mud does stop mud sticking to the frame, for a while at least.

sorry to brake your logic but your brake on pushing on the bolt straight.. you are wrong. if you have a rubber, tightened at the "entrance" of the friction force, as you brake harder, the tension on the brake pad will elongate it thin it out (reducing the thickness of the pad), and also start tearing it. the bolt of the brake pad is not meant to hold the braking force, but just the rubber insert not to fall out. if you have it as shown in Hambinies video, you will have compression in the direction of braking force, making the pad thicker and also it will be butting up against the insert holder. also you will have more pat material where your biggest braking force is generated... from most of the comments it seams that you are trying to find a way to make it look worse than maybe it is. 1st of, you assume the video is uncut and every part of the video, blt not being tight is as is... the wheel was supported by the tool drawer from underneeth... which you would see maybe... but to your credit you have a lot of good points and explanation

Crazy state of the bike….

Please, don't get too harsh with this 5 yrs old engineer and his beloved hairdryer. 🙏🏻

Serious question, Can you explain why you hold your Titanium bike in high acclaim when it has a defective bottom bracket? According to the SRAM specifications, your frame hole is too small. Do you feel that you ignore manufacturer data because you know better?

To be fair to Hambini, that video appears to be from 2017. His maintenance skills might have improved a bit since then.

He is not the neatest mechanic/engineer but this service deserves a badge of dishonor; Sewage headset service by a 5 yrs old!

I as a rule dont like people point scoring off each other, I would never criticise another persons video. However I was pretty shocked at the poor practice in this video. Its certainly not the way I work. I also cringed at the top cap being tightened, that was pretty much the worst thing on the video. This is after all a pretty simple job for a decent bike mechanic 👍

Ham could paraphrase Dr. McCoy's (Star Trek) favorite declaration: "Damn it Jim, I am an engineer, not a mechanic".

This video needs some kind of content warning. Watching that bike getting that treatment has left me traumatized. And what's going on with that bar tape?

You sure this wasn't a joke video ?

It’s not just road salt, Hambini lives close to the sea, in the well known aerospace capital of the UK, Grimsby😀 That regular ride to ‘the oil refinery’ exposes the bike to wind blown salty sand from the Humber estuary. A few weeks commuting in those conditions and any bike will experience corrosion. Grease would indeed help, GT85, a more expensive version of WD40 aka kerosine with added teflon doesn’t.

He went in dry 😂 My days.

trying to go head to head with Hambini is a bad idea

The front wheel was not removed for obvious reasons, it was seized in..

Thoughts on the Hambini Christmas Reaming? 😂

Yes, this is a really strange thing what Hambini is doing here. Especially when you know how much precision and meticulousness he puts into his bottom brackets (of which i got a PF30, that works very well). Besides - i am a very thorough „greaser“ myself. I grease literally almost ANY screw on my bikes. Most important: The pedal axis screws! I had a case some time ago with a so-called bike „designer“ who sold me a bike where he had installed the pedals without any grease. It was almost impossible to loosen them later on. Never forget to put LOTS of grease on those threads…

He was pretty quick to post a reply video, slamming your titanium bottom bracket description.

Specific greases and weights are needed for each application. E.g ti prep for titanium etc. Where 2 different metals contact each other there is galvanic corrosion. Water and salt is the catalyst therfore cleaning and re-greasing is needed more in wet or dirty conditions. This maybe stating the obvious but it is often neglected.

Haha.. fun video. He's a bit slack, but you're a bit hard too. Yeah - no grease is dodgy. Bring it on :)

For the life of me, I don't understand why he didn't remove the front wheel, before removing the fork... I'm not skillful in anything,and I can be a bit of...cluts😅 but I would definitely remove the wheel first, before removing the fork,to be serviced,greaced, cleaned, whatever... Why he didn't loosen the screws,when removing the stem... Again...idk😅 And that squeaking sound when installing the stem on the steerer, I mean...why making it harder than it has to be..And no lubricant of whatsoever????? Man.. And... just because someone is highly educated engineer, doesn't mean he's good with tools,or just plain old bike service! We learn..!😅😊 Greetings from Croatia from Kris 😎

He does enjoy playing in the dirt it seems, I remember watching his video on how to service shimano hubs and almost throwing up.

You'd think for an engineer he'd have the correct tools For working on a bike! Like the headset remover tools ive seen enough 😂

From viewing this video of his, he looks like an amateur bike mechanic. But many of your criticism of him in your video show that you are often wrong as well (from his response video), and yet you claim to be a trained bike mechanic. It seems weird that you have had to go back 5 years into Hambini's history to find something wrong. Greasing the bearing seating is optional. I apply a very small amount. The grease shown in the mountain bike video was excessive. That much grease is a great muck accumulator.

A Master Class in how NOT to service your headset. Not all mechanics are engineers and not all engineers are mechanics.

Spraying your whole bike with GT85 makes it faster when braking!

I wonder how many system and component failures on the F-35 can be attributed to Hambini....

I have never had to bang out my fork. Maybe a soft tap from my hand, but never had to bang on it like like that. I have a friend who owns a bike shop. She has a "wall of shame". His headset would go onto that wall. And who works on the fork and doesn't remove the wheel?

Are the brake pads on the wrong sides of the bike, thus meaning the direction of travel is wrong? I couldn't tell from the image.

As a bike mechanic i'm crying as his bike is. That is painfull to watch 😢😢😢

“Yesterday I couldn’t spell engineer. Now I are one.” 😂

That ratchet head resting on the frame...................mmmmmmmmmmmmmmmnnnnnnnnnnngggggggggggghhhhhhhhh

remember who Hambini or Sanjeev really is: a PhD in Aerodynamics, Lead engineer from a reputable company, 25+ years experience in the job of aerospace engineering, selling bicycle parts on his RU-vid channel under as chosen synonom 'Hambini'. If anything above written sounds strange to you, especially the part with PhD and selling bicycle parts: congratulations! You passed the red flag test of how to spot a con artist. Well done. Nothing wrong about selling bicycle parts, but things Hambini claim he is and thing he does on YT doesn't match together.

Lol Hambini is such a hack. Ps I’m a bicycle mechanic of over 30 yrs experience in the bicycle industry. Great video by the way.

That top cap is obviously threaded to the bolt. Also, do you know any doctors who smoke or drink excessively? He may treat his own bikes carelessly but that has no bearing on his competence.

gotta enjoy a good ole reeeeming

So it's OK to spray your frame with GT85 (with all its rough aditivites) all over but not good to put a small amount of grease between the bearing and the frame... blimey!

Well now I feel not do bad, working on my bikes like I am not sure what I am doing. Still doing better job than aero engineer... Thanks for video, I really liked that video.

I appreciate the first video I saw of you debunking Hambini about striking a bearing vs using a puller but watching this video? Oh man, saltiness is in the video. You are just going overboard, to the point that I can also smell jelousy. Stop using Hambini on your videos, instead make videos that contradict him and other "wrong" mechanics without mentioning their name, make your own name without riding someone else's name. Disclaimer: I am not a Hambini fan, I am not an expert(that is I'm watching bike videos) and English is not my native language but this will be the last time I will watch your videos. I did not even finish watching this video because all I can feel is saltiness. Good luck.

It is his own bike he can bodge it as he please I think, like many other home mechanics :D

I'm an Aerospace Engineer with vast experience with the big players. I've always been suspicious of your Hambini, Peak Torque experts. It is extremely rare to work and gain working knowledge in a wide range of speciality areas, typically Manufacturing, Composites, Design, Stress, Aerodynamics, Fluid Mechanics etc. They are distinct roles in themselves and you don't move between them and definately not expert in all of them.....

I laughed so hard when i saw that big hammer in his hand 😂 And the sound of those hits...hahahahaha 🤣 Hammerini making a foul of himself again. I bet anybody will do that job better after watching a youtube video with how it should be done properly.

That rust in that steering is exactly what GT 85 leaves for you in winter months! Don't do it!

7:51 After sending a clarification I did not get any answer from ITM, so I tried to send more info trying to explain what I'm asking, I referenced this video, and shared a link to it, a screen shot. But still no answer. It's simple, thing to answer, is the stem cap threaded? only two options Yes, No. Strange they can't answer a simple question.

By the way top cups, require very different tightening forces, depending on brand and type, from 5Nm up to 10Nm (eg Look) Hambini is known for his know how on aerodynamic and BB design and manufacturing, which are the best in the bike industry.

Hes not even using a Torque wrench on a carbon head tube waw! 31.38 the top cap the back is higher than the front like he's stripping threads not putting it back in straight!.be why it's screaming!

Whose bike was it? His own?

14.23 whats up with that tyre the rubber looks all deformed that bike Looks like a barn find but hes got the garmin on it so is this a daily driver? No i hope not its someone who doesn't appreciate what they have!

Someone is jealous here 😂.

his bike is an absolute mess, wouldn't want to own that bike even if you gave it to me for free

Genuinely can't work out if he's trolling or not

I enjoy Hambini’s more academic videos/power points, he demonstrates he inherently understands stack tolerance issues, something most just do not get. He is definitely a smart “Engineer”. Most qualified BE, PHD “Engineers” go through a predominantly academic training route and hence commonly do not ever gain the soft skills and knowledge of those that go through a more practical route. This video should be used as a brilliant example of getting someone with the wrong training/experience doing a job. I hope Hambini takes the positives from your video in understanding that being a smart PHD person, commonly does not give you the soft Engineering skills. This is what apprentice training was for. Horses for Courses. For videos on more academic subjects. I smart PHD person is the Horse for the course. For videos on the soft aspects of basic bike maintenance, an experienced, thinking maintainer is the Horse for the course. Being wise in Engineering, is knowing you can learn something from everybody.🙂

Reginald, may I ask for advice? I got a Triban RC120 for free, it's brand new and I liked it. Planning to do some upgrade to 105 groupset, what are your thoughts? What would you do? I also will upgrade tires and little things like carbon seatpost and stem...

Happy Christmas Reg!

What a complet bodge job. The kind of repair you do at the side of the road in an emergency. All in a hurry, no grease, brute force. Apparently the top cap has an integrated bolt. Hambini got himself a bit cocky. You known you're going to be watched by thousands of people. He should've informed himself a bit better and tried to do a more professional job if his intention was to educate people. I can't understand it unless he was asking to get rimmed 😅😂

Taking the piss out of Hambini? That was fun 🤩

Wow, I wouldn't treat my hack bike with so much disrespect! It's obvious he hasn't got a clue.

HE USED A TORQUE WRENCH TO REMOVE BOLTS. THAT WILL DESTROY THE INSIDE MECHANISMS. I wouldnt trust this guy with my bike.

I think the bar tape says quite a lot about his competence

No grease in the bearing steerer wtf!

Thanks for posting. This video is shocking! Not even my winter bike, that sees both snow, rain and sweat from indoor training, have ever had corroded steerer tube bearings. The handling of this bike is pure foolish. I kinda expected he would put it down on the handlebar/saddle at some point.

Wow, that hurts. This shows the difference between an engineer and a mechanic.

So bad for an engineer, unbelievably crap. That is the work of a 5yr old

Pixie dust ALWAYS works!!!!😊😊😊

Hi there, 9000 series brakes have the set screw on the front. ~really they do, both the direct mount and center mount. Also a bike mechanic, I get things wrong all the time it’s easy to do with all the different standards. Pretty certain on this one with the calipers. It’s on my bike now.

So awesome love all your vids, you dont see this kind of stuff from bigger youtubers like gcn. Happy holidays!❤

I haven't watched the video yet but the title gets a thumbs up 🤣

He published a reaming of this video where he claims his top cap has a threaded collar. That does not make any sense to me. Why would a top cap be threaded. I commented and he replied. He wrote wits obvious that it's threaded. Strange. Nothing obvious.

Hambini is right on many accounts and he has a courage for calling out the bike industry that went in deranged mode recently with its unnecessary tech nobody has asked for and insane prices... but then Hambini is absolutely shite bike wrench and I would not let him work on my trusty steel bikes let alone carbon fiber ones... My aluminum seatpost gets off from the steel frame easier than he can drop his carbon fiber fork. Go figure...

I've heard things about him and maybe people said some bad things. But I immediately knew all of it was 100 percent true based on his video reactions to criticism. He is congenitally unable to accept constructive criticism. We all have room for improvement. He could really learn things if he would only listen.

He is like, he does not give a shit about bicycles :D, to me it is kinda shamefull to record "this"

Hambini has just put you to sleep.

i did cycling years. and i never seen bike look like that. why so dirty. i doubt mechanic bike look like that.

I see many efforts to destroy hambini's reputation, why so?

Hambini… In the land of the blind. A one eyed man is king.

From what I saw from Hambini over the past few years...he looks like a really good engineer...but that's all. He know how to really design good stuff, he know how to manufacture things...but being a good mechanic is another thing. And that's not because you are a good(or even a perfect) engineers, that you are a good mechanic. You could, but usually, it's rarely the case.

I literally winced when he repeatedly whacked the steerer tube with the Birmingham Screwdriver. And again when the top cap was tightened 😬 I'd appreciate a video on how to replace headset, including IDing the size/type, when/where to apply grease. I'm sure park tools have one but i enjoy your channel.

I don’t know this hambini guy but as an aircraft technician in the aviation industry for the past 15 years, I have worked on all different types of components whether is it from strip down to disassembly and assembly line most importantly thing the key is greasing when you do the assembly on an aircraft component Especially metal-to-metal contact surfaces this is why greasing is very important! IDK this guy what engineering is in But for sure if in the aviation industry, he will be out!! 😂 I do have a Dogma F12 I service my own and maintenance and I don’t do dry installation why I know if you don’t grease or lube the bike definitely creaks.

that bike is more neglected than my 90's mtb full steel road bike converted bike

Shajt.

We may disagree on many points but I'm definitely with you on this one Reginald, that was a first rate hack and painful for me to watch. Makes me think a lot of the bb creaks Hambini is trying to fix are something else entirely. This vid has altered my opinion of Hambini and his competence somewhat for sure.

One thing I'd disagree with is the expander plug - the main purpose it serves is as a preload anchor for the top cap. In carbon forks it also prevents crushing but it's not its primary function. Some carbon forks don't even use it - depends how thick the steerer tube is, after all it's no different than the seat post which you can clamp with much higher forces without crushing.

Well, Reginald you seem to have exposed Hambini as a pretty sloppy bike mechanic, the level of work expected from a 5 year old and as an added bonus, you've made a pretty entertaining enemy, I can't wait for the next installment.

The headset bearings don't rest on a bare carbon "cups". There are metal seats top and bottom bonded to the inside of that head tube.

I would say the way he removes the outer race of the upper bearing is 100% fine. BUT it needs to sit loose. As it was here.

My first thought was his actions were just plain inexperience. But I think there's actual ill in his skill and a blithe desire to beat unmerciful on carbon components. People have been slapping things together for years I suppose. But it's a strong reminder why I do all my own work. If I get stranded in the boonies or late for work, I have only myself to blame.

I remember wincing all the way through this video the first time I watched it.

HaHaHiHiLOL! How not to do it! That should be the title of Hambini's video! The sound heard when he tightens the top cap could be the expander being pulled up! I would of course also use a lot of grease, maybe a little Carbon Assembly Paste on the grip surfaces of the expander, and on the stem, if it can turn at the specified torque! I would only use copper grease if I had nothing else, because it is intended for things that get very hot, such as brakes on cars, and it is toxic! Otherwise I think you are 100% right Reginald!🤣😭😎👍

I assume the GT85 stuff is done as a form of lubrication. The banging of the steerer tube was pretty bad. He's certainly no bike mechanic.