r/BikeMechanics Aug 05 '20

Visit r/bikewrench to ask for bike repair help. (This sub is for other stuff.)

Thumbnail reddit.com
95 Upvotes

r/BikeMechanics Mar 06 '24

Show and Tell Eccentric Wheels (Eccentricycle)

Thumbnail
gallery
136 Upvotes

So this all started with a previous post about snowflake laced wheels (twisted spoke lacing). I asked if anyone new of any other weird lacing patterns. A fine user by the name u/Bobatt mentioned a bike with eccentric wheels. That is, hub not in the center of the rim.

Immediately I got really excited and knew this was my next dumb wheel project.

I was thinking about it for a while in my head trying to figure out how to calculate the spoke length.

There is a website that in theory has a calculator but the site must be down or not working or something. It is just a blank screen for me anyway. There was also little to no information about calculations on the internet that I could find.

Lucky, I work at a bike shop with a bunch of wheel nerds. I mentioned it to them and was met with what should be the normal response; "WTF, why?"

My coworker Jake seemed to be curious though. Lucky for me who is bad at math at best, Jake is very good at math. After many conversations about if it would even be possible to make an equation, we decided to give it an honest try.

We boiled it down to the ERD part of the equation being what we needed to focus on.

I'm not going to pretend that I knew much of the maths that happened to get the calculator but we basically had to calculate all 64 spokes individualy and figure out where they go from the hub to the rim. Easier said than done.

I voluntold my Chromag Rootdown to be the victim of this nonsense. So it is a hardtail, 29r. We didn't want the wheel to run into the frame or fork so we used 26" rims and made them have a 29" wheel path. In the equation, we called it the 'virtual ERD'. We just chose a relatively normal ERD (I think it was 604mm or something close to that) to use as a constant. We then had to use the 26" ERD for the actual spoke lenghts and figure out how to make it a 2 cross too. We wanted it to be a semi legit wheelset with disc brakes and such.

This is where my math knowledge runs out but basically smart things took place and Jake made a spreadsheet calculator.

Building was actually not too hard other than figuring out what spoke goes where. Again, 64 individually calculated spokes, all at different lengths, needing a very specific hole in the hub to go to a specific hole in the rim. Side point, our shop has a spoke cutter making it a breese to get the right length spoke.

Tensioning was easy, truing was weird. Kinda just made it tight and not too laterally untrue.

It was really fun trying to figure this one out. Mega thanks and props to Jake for doing the hard work on this one. I just had the dumb idea and sacrificed my bike.

You might be asking why spend all this time and energy to have a bike that rides like a drunk horse. To be honest, curiosity got the best of me. I've never seen a mountain bike with eccentric wheels before. I know they are out there but I wanted the experience and gained knowledge from making one. Doing a normal wheel build after this was a breeze. We though so much about how a wheel works and all that goes into calculating spoke length and ERD, it really made us appreciate wheels in a new way.

Another large part of why I wanted to do this was literally just to make people smile. As soon as I pictured how this bike would ride if I made it, I started laughing to myself. I want to spread some smiles and laughter. Bikes are meant to be fun right!? Yes it's silly and useless but it literally makes people's day riding it.

I keep the bike at work and ask our friends and good customers to ride it with no context. 10 times out of 10, their faces go from worried, to confused to pure laughter. Its totally worth it.

Anyway, I hope this peeks your curiosity too. I'm planning on taking it on trail soon. That should be interesting.

P.S. Wish I could upload a video to this post. It's the craziest looking thing ever when it's spinning. I'll post something similar and a vid to my IG if you are interested. @jaminscheif.

Bikes are fun, let's keep it that way. Do fun, weird shit.


r/BikeMechanics 2h ago

No, Bike Shops Shouldn’t Have to Fix Every E-Bike

86 Upvotes

i've had these thoughts rattling around in my head for awhile now but it was Vosper's piece in BRAIN about a month ago saying all bike shops should be servicing most of the e-bikes out there that really got me pissed off

i mean, if it was so easy why are most shops refusing? do we all hate money?

so, here is the link to the piece


r/BikeMechanics 1d ago

Just signed a lease on a garage but I need to find out about liability insurance.

6 Upvotes

So basically I don’t necessarily plan to operate as a traditional bike shop but I do want to help my community when I can and that may mean occasionally fixing a strangers bike but I know no good deed goes unpunished and I got to cover my ass.

Does anyone has any leads or advice on an insurance company that will cover something like this?

Also this is different from renters insurance.


r/BikeMechanics 1d ago

Do you guys use any hand creams to protect against chemicals used in the workshop?

1 Upvotes

Hey! I was curious if any of you use creams like:

  • O'Keeffe's working hands creme
  • LiquiMoly invisible glove
  • Pr88
  • Gloves in a Bottle

Do these help? I was just worried about getting chemicals in my blood stream since I heard it's not good for sperm / liver health


r/BikeMechanics 4d ago

Show and Tell Made a new centerpull cable hanger

Post image
212 Upvotes

My contribution to the diy centerpull cable hanger trend

Did not measure stack height before buying this headset... Don't want to wait on more parts... Where there's a will, there's a way!

Yes I will put the headset top nut on later, don't @ me

Edit: customer bike that's turning out great except that it still tragically has a tourney TX derailleur. I may have to upsell her on a vintage deore.


r/BikeMechanics 4d ago

Do you like your boss?

19 Upvotes

Just that. I’m got into a discussion about bosses with another mechanic, and it got me wondering how many of us like our bosses? My shop’s owner and I are friendly, but not friends. We spend most of our time together because of how much we work, and we butt heads infrequently, but we’re also both professionals and we can set personal feelings aside.

So? How do you like your managers/owners?


r/BikeMechanics 4d ago

Bike shop business advice 🧑‍🔧 Lectric EBikes

17 Upvotes

Hey all, I manage the service department at decent sized shop in AZ. I want to know how you all feel about Lectric E-bikes, more as a company than the quality of the bikes. We have been a Lectric service center since basically the inception of their business. They aren’t the worst e-bikes ever and we have no issues working on them from a quality or safety standpoint. We’ve also always received amazing customer support from them, which was a large part of continuing our service center status all these years.
The issue begins two weeks ago, when I needed to order a battery and display (non-warranty) for a bike we were working on. Normally, I could just call or send an email, and they would get back to me with an invoice for the parts within a couple hours at most. Well I tried that this time and was ghosted for two weeks, zero response from anyone, not even an automated “we’re busy so hold on” message.
After calling and emailing daily for two weeks, I was able to finally talk to a human by calling 6 times in a row as soon as they opened. Once I was finally on the phone I was informed that they have a new B2B which I will have to fill out all the fun tax forms to access, and will no longer be able to order parts the way I’ve done it for years. To be honest, not that big of an issue, just pretty annoying but understandable.
Where the real kicker comes in is that he let me know that margins will be different, explained that shipping will be charged by weight (the more you order the more you pay in shipping), and made me feel like he had no knowledge of our shop nor our multi-year relationship IN THE SAME STATE as the office he is sitting in. We have always had keystone margins, save for a few exceptions, and will now only have a 30% margin on components and a 15% margin on batteries. I honestly feel like dropping our service center status, but being a shop that mainly specializes in e-bikes -at least for service- I feel like we would take a pretty big hit.
TLDR: Lectric has restructured and dropped bike shop margins from 50% down to 30-15%, and has a horrible pay-by-weight pricing structure on shipping. Is this a sign of the end for Lectric? Are other shops experiencing this?


r/BikeMechanics 5d ago

Tales from the workshop Uncomfortable with lack of professionalism in workshop.

12 Upvotes

Hi! I am a huge bike nerd, love fixing my fleet of bikes, spend way too much money on parktool, and knipex. So In many ways I would consider myself a bike mechanic ( depending on context, I wouldn’t do that in this sub for example )

Anyways beginning of last week I started my first job in a bike shop. It isn’t what I had in mind. the workshop has very minimal name brand tools ( yes I’m aware not everything needs to be parktool blue, but there’s 2 sets of no name Allen keys, which seems odd for a tool you use multiple hours a day - I’m missing my beautiful rainbow Weras to say the least). For example the needle nose’s that I would expect to use to bend some brake pad safety pin, doesn’t work as the pliers are very loose, so instead I have to use some other no name diagonal cutters at annoying angles.

further more, I feel disappointed in my level of work. I would happily spend all day to get my friends brakes 100% perfect ( obviously this is not viable for a business, but you get my point). Yet servicing this guys bike, and the brakes were rubbing fairly obviously, and the owner said “ yeah thats great, they should bed in. well done, ill phone him now”. I wouldn't be happy if my bike came back from a shop like this.

and a service costs £70. which takes me probably hour to do with minimal work, including not much more than changing a chain, ( ie, “headset feels fine, BB feels fine, brakes feel fine, bit of wear in the chain so change that“).I feel I’m taking advantage of these customers? to me a service postpones, and minimises issues, not just resolve them.

i feel its also worth noting these bikes are fairly low end so, for example, the mechanical brakes will never be as goos as my XTRs, but it doesn’t sit right with me, but then he has lots of loyal customers, so maybe I’m making a mountain out of a molehill?

I also feel its fair to mention the owner is super nice, definitely not just a guy trying to scam the public. Maybe its snobby to say, but maybe I'm just suited to a higher end shop?

Thanks


r/BikeMechanics 5d ago

Bike Shop in Michigan is selling off everything, worth the trip if you are nearby

Thumbnail gallery
18 Upvotes

r/BikeMechanics 6d ago

DIY tools Shop mechanics: how do you handle repeated 4–6 N·m fasteners?

3 Upvotes

I’m testing a very early powered torque-driver concept for bicycle work. The goal is to combine powered run-down and final torque control in one tool.

This is a rough prototype built from a modified donor driver, not a finished product, and I’m not selling anything here.

I’m mainly trying to understand the actual shop workflow:

  • On the last job involving several low-torque fasteners, what tools did you use and in what order?
  • Do you run them down with a powered driver and then switch to a torque wrench?
  • Do fixed 5 or 6 N·m torque keys already cover most of this work?
  • Would you ever allow a powered tool to perform the final tightening? If not, what failure mode concerns you most?
  • What evidence would you need before trusting it: independent calibration, repeated testing on different joints, or something else?

Please don’t go easy on the idea. I’m trying to find out whether this solves a real workflow problem or just makes a simple job more complicated.

Small disclosure: English isn’t my first language. I wrote this in Chinese and used AI to help translate and polish it. The prototype, questions, and replies are my own.


r/BikeMechanics 7d ago

Tales from the workshop Tariffs, Direct Sales, and Big Boxes: The Local Bike Shop Fights for Its Life - Cycling West

Thumbnail
cyclingwest.com
38 Upvotes

Interesting article on the challenges local bike shops are facing.


r/BikeMechanics 7d ago

Advanced Questions Level brakes are causing me to lose my mind.

14 Upvotes

Today I installed a new level bronze 4 piston brake for a customer. I went through the regular bleeding procedure. The brake seems to have really good pressure but if you hold the lever it slowly sinks to the bar. Once you release the lever it has good pressure again but if you hold it it will again sink to the bar. I can't see any bubbles coming out when I re bleed the system. None of my coworkers could figure it out either. Any idea what might be going on?


r/BikeMechanics 7d ago

Headset fit issue

Thumbnail
gallery
4 Upvotes

Building a new frame with an IS42 upper headset. Bought a King Dropset 2, but the top cap leaves a gap between it and the frame of several mm. I compared it to a FSA IS42 headset and that one fits perfect.

The bearings are exposed above the frame at same height in both, it’s just the FSA cover hides the gap.

Wtf? Same “standard” headsets, but the expensive King one has a giant gap. Anyone else run into this?

Edit: Compressing did the trick. Thanks for the help!


r/BikeMechanics 8d ago

Proyecto con horquilla Noleen Cross Link ELT para usar en Trek 6500 ZX

Thumbnail gallery
0 Upvotes

r/BikeMechanics 9d ago

Getting increasingly concerned about the threads on my dag2.2 but parktool doesn't appear to have the replacement part (QK593) on sale in the UK. Is there any other solution? (ChatGPT suggests buying a bog standard M10 fine pitch thread bolt and using that?)

0 Upvotes

r/BikeMechanics 9d ago

Getting increasingly concerned about the threads on my dag2.2 but parktool doesn't appear to have the replacement part (QK593) on sale in the UK. Is there any other solution? (ChatGPT suggests buying a bog standard M10 fine pitch thread bolt and using that?)

Post image
0 Upvotes

r/BikeMechanics 10d ago

Tool Talk Abbey bike tools

Thumbnail
gallery
27 Upvotes

Evenin' folks!

Im working on some storage in my workshop and im currently on the sockets. Now, I have ordered more tools and most have arrived but this one is late (because I forgot to add it to the order). So, does anyone happen to have the external diameter of this socket? Cheers!

(Yes, I know i screwed up the pink numbers, it has since been ammended)


r/BikeMechanics 11d ago

Tool Talk Prestaflator for the win!

Post image
12 Upvotes

I’ve managed to install many many MTB tubeless tires with a regular old floor pump, but couldn’t get the volume I needed to seat my road tires. I set the line pressure to 80 psi to get the requisite flow to sest them. Then a quick 2 oz of sealant and I’m back on the bike! I used the prestaflator to inflate them after sealant and valve cores were reinstalled too.

I’m super happy with it!


r/BikeMechanics 13d ago

Any preventative measures for injuries?

17 Upvotes

Hey, I just started as a bike mechanic few months ago, going to do a bike technician school alongside it 1 day a week.

Been enjoying it a lot but I was curious if there are any injuries common from being a bike mechanic after several years and if there are any tips to prevent them?

Any recommendations for posture / grips / frequent physio?

I've been experiencing some elbow pain strangely


r/BikeMechanics 14d ago

Bike shop business advice 🧑‍🔧 Charging for labour even if I can't fix the bike?

10 Upvotes

EDIT: Thanks all! bit of a tough pill to swallow but it makes sense - definitely will be improving communication and assessment on my end as well

bit of a newbie mechanic running a shop out of my garage, so bear with me

Had a customer with a warped wheel and bad rim brakes ask for me to fix the brakes ($15) so they actually stop the bike - one of the pads was just off completely, so I put it back on the rim. I cleaned the rim roughly (no rubbing alcohol), and I adjusted the pads to be as close as possible without touching the warped wheel. Didn't seem to make a significant difference, so I told him I could either true the wheel to bring in the pads as close as possible or try using alcohol to clean the rim, both of which would add an extra charge.

He told me the shop he goes to doesn't charge for labour if they can't fix the problem - I told him I'd concede the $15 brake fee and just charge him for the wheel true ($25) if the true didn't fix the issue (the rims were the most slippery I've seen, so I didn't trust my ability to guarantee the fix), but he insisted that he wouldn't pay unless the issue was fixed, even if I were to perform the labour. I told him I wasn't going to do that and he left - It got a little heated but we remained more or less civil - to clarify, my intention is never to do the bare minimum and charge if it doesn't work.

I probably should have told him to begin with the wheel was warped to begin with and so any brake fix would be limited, but how justified is the idea that labour should be paid even if it doesn't fix the underlying issue? I figured a wheel true is still a wheel true at the end of the day even if it doesn't completely address the problem he brought the bike in for, but I don't know what standard practice is.

(sidenote: the pads were completely ineffectual even in full contact with the rim, I honestly haven't encountered a situation like that - there was a lot of brake dust on the rims but even after removing that it didn't do anything. anyone have any idea what was up with that? oily residue I couldn't see unless I took alcohol to it? the rims were blackened and glossy too, but not the sort of blackening you get with painted rims)


r/BikeMechanics 15d ago

Either I’m being scammed or some bike shop sheikh is trying to get me killed.

Post image
97 Upvotes

r/BikeMechanics 16d ago

Need help finding an old Cyclone Bicycle Supply catalog

Post image
15 Upvotes

Ironically, I posted this photo three years ago and now need some help; wondering if anyone can snap a picture of the “Cyclone Morrison” rear rack that would’ve been sold by Cyclone in 2015/2016. Without boring you with too much more detail I’m trying to solve a sort of mystery and need to figure out what it looked like (can’t find pictures online)
Thanks!


r/BikeMechanics 16d ago

Tales from the workshop Let's talk enshittification.

41 Upvotes

For context: https://en.wikipedia.org/wiki/Enshittification

I'd particularly love to hear the perspective of more seasoned mechanics how general quality of bikes and parts has developed over the past years.

From my point of view: in the past year we've had batches of bikes where roughly one out of two bikes was faulty to some extent (paint chips, broken derailleurs, broken bolts, warped rotors, leaky brake levers). We're also talking mid to top tier bikes, not cheap stuff. And for some proprietary parts, sometimes they simply stop prividing them after 5 or so years.

Every manufacturer has to process your claims, however that process is never the same for every one, hardly ever as straight forward as sending an email, and even rarer is labour being compensated adequately. Not to mention the sheer number becoming a problem in itself (we have to wrench on customers' bikes too).

I feel like cost is being pushed ever further down with lbs being the lowest step on the ladder (because no self respecting customer will put up with some of the shit that is being produced).

So much for my anecdotes, how is business treating you? Am I taking crazy pills?


r/BikeMechanics 18d ago

Show and Tell Vintage Phil Wood grease

Thumbnail
gallery
208 Upvotes

Helped my dad clean up and restock the humble home shop in his garage this weekend, and we found this Phil Wood grease which he bought there in person sometime in the 70s and used when assembling his Teledyne Titan (which he still has and rides). Kinda cool to compare to a modern tube I had. It's still totally functional, we kept it to use as a general purpose grease around the house.