c/bicycle-mechanics

Had a customer insist his brake rub was "just cable tension" last spring

Guy rolls in with a disc brake that's been rubbing for weeks. He's convinced it's a simple cable adjustment. I spin the wheel and it's rubbing in one spot only, so I show him the rotor is visibly bent. He argued with me for 5 minutes before I grabbed a truing fork and straightened it right in front of him. The look on his face was priceless. Anyone else deal with customers who think they know the problem before you even look at the bike?

Called BS on tube sealant for years. Now I'm a believer.

Had a customer bring in a road bike with a tiny puncture last week. Stuck some Stan's sealant in there. Held 90 PSI for 3 days straight. Never thought I'd say this but I'm ordering a gallon for my own bike tomorrow. Anyone else have a product they refused to touch and then it proved you wrong?

Took me 2 hours to find a seized derailleur cable on a 3 year old bike

Customer brought in a bike that wouldn't shift past the middle of the cassette. Figured it was a bent hanger or a dirty pulley. Checked both, cleaned everything, still had the same problem. Finally pulled the cable all the way out and found a tiny rust spot inside the housing near the bottom bracket. That one spot was enough to bind the cable under tension. Has anyone else run into hidden cable corrosion that took forever to track down?

Pro tip: a customer's comment about spoke tension changed how I work

Had a guy come in yesterday with a wheel that kept going out of true. He mentioned he used to build wheels for a shop in Denver and said 'you gotta listen more than you look.' I always focused on the truing stand readings. So I tried his way, closed my eyes and plucked each spoke on a wobbly wheel. Heard one that was way off pitch. Fixed that spoke alone and the wheel came out dead straight. Anyone else use sound over sight for truing?

Finally caved and went tubeless on my gravel bike

I spent like 2 years running tubes on my Kona Rove because I didn't want to deal with sealant mess. Then last month I did a 40 mile ride on the C&O Canal towpath near DC and got 3 flats in 15 miles. My buddy let me try his tubeless setup and the difference was night and day. Has anyone else had that moment where stubbornness just wasn't worth it anymore?

Watched a flat-fix video from some shop in Oregon and it blew my mind

I was looking up how to patch a tubeless tire that kept leaking at the sidewall, and this mechanic showed a trick with a rubber cement plug and a dollar bill as a patch. Has anyone tried that method for tough sidewall holes?

Doubted ceramic chain lube for ages until my drivetrain stayed clean through a whole wet week

I used to think ceramic lube was just marketing hype. Paid $18 for a bottle of Squirt and figured I'd proved myself right when it wore off after 60 miles. But then I rode through six straight days of rain in Portland last November. My chain stayed quiet and I only wiped off a little gray sludge once. My buddy Dave who runs a shop had been telling me for years that the cleaning time alone was worth it. After that week I finally got it. Anyone else have that one product or trick they swore was fake until a real world test changed their mind?

Had a shop owner yell at me about using a torque wrench on carbon stems

I was working at a shop in Portland a few years ago and this older mechanic saw me torque a carbon stem to spec. He laughed and said I was wasting time, that his 'feel' was better than any torque wrench. I shrugged it off until I had a customer come back with a cracked steerer tube from another shop that didn't use a torque wrench. That repair cost the customer $400 and he was pissed. I still get teased for being slow but I haven't had a single warranty claim from my work since. Do you guys trust your hands or do you actually check torque specs on carbon parts?

The debate on greasing pedal threads - anti-seize vs. grease

I used to always slather grease on pedal threads like my old mechanic taught me back in 2010. But last year I started using anti-seize compound on aluminum cranks after reading a thread about galvanic corrosion. Now I'm torn - the grease never caused me issues on steel cranks, but the anti-seize feels like overkill for a pedal. Anyone else switched methods and seen a real difference over a few years of riding? Or am I just wasting time with the extra tube in my shop?

That moment I realized my chain was installed backward on a customer's bike

I've been working on bikes for about 4 years now, mostly at a co-op in Portland. Last month a guy brings in this vintage Schwinn and asks me to put on a new chain. I do it quick, 5 minutes tops, everything looks fine. He picks it up that afternoon and calls me the next day saying the chain keeps skipping on the smallest cog. I tell him to bring it back. So I flip the bike over and start spinning the pedals, and I notice the chain is rubbing funny against the derailleur cage. That's when my coworker Sarah walks by and goes 'hey, your chain is facing the wrong way, all the printing is upside down.' I had no idea chain direction even mattered on most bikes. Turns out some chains have an inner/outer side and I just slapped it on however. Felt like such an idiot. Has anyone else missed something that obvious and felt dumb about it later?

Ngl I had to walk a customer's bike home after a shifter cable snapped mid-shift

I was out on a test ride after adjusting a guy's 9 speed setup downtown near the coffee shop by 3rd street. Went to shift from the big ring to the small one and the cable just let go with a pop. No warning at all. Had to push the bike 6 blocks back to the shop while he stood there looking at me. Turns out the housing was rusty inside from a bad install the previous owner did. Has anyone else had a cable fail on a test ride? How'd you handle it?

Why does nobody talk about how bad cheap cable housings are for shifting feel?

I was helping a buddy tune up his old hybrid last weekend and he had this no-name housing from Amazon. I figured it'd be a bit stiff but man, it was like trying to shift through molasses. We swapped it for some basic Jagwire stuff I had lying around and the difference was night and day. Has anyone else run into this where cheap housing just kills the whole ride?

That old guy at the co-op showed me a trick that saved me 30 mins on cable routing

I was at the local bike co-op last Saturday trying to route some internal cables on a 2015 Cannondale frame. A older guy who volunteers there watched me struggle for a bit then just handed me a magnet and a piece of string. He showed me how to tape the string to the magnet and fish it through the frame, then pull the cable back with the string. It took me maybe 5 minutes after that. Has anyone else got a weird trick like that for internal routing that just works way better than the normal way?

That internal headset install took me 4 hours longer than I thought

I was swapping a fork on my old Rockhopper and figured the headset would take maybe 30 minutes. But the crown race wouldn't seat right no matter how hard I hammered it. Turns out the new fork had a slightly wider steerer tube and I didn't measure it beforehand. I ended up filing down the race inside for like 2 hours until it finally slid on. Anyone else ever have a simple job turn into an all day thing because of one part not fitting?

Had a spoke snap on a rural delivery route last fall

I was about 12 miles into a 35 mile rural route near Smithville last October when I heard that distinct PING. The rear wheel started rubbing against the brake pad with every rotation. I had to walk the bike a half mile to a farmhouse and ask if I could borrow a wrench. Managed to loosen the brake caliper enough to limp the rest of the way without the wheel locking up. Has anyone else had to patch up a wheel on the go with limited tools?

Finally saw why people swear by facing tools

Used to think facing a frame was just a waste of time. Extra step for no real gain. Then I got a customer's bike where the headset kept creaking no matter what I did. Took 15 minutes with a Park HTR-1 to face the headtube. Zero noise after. That was 3 months ago and the bike still rides perfect. Anybody else have a tool they ignored for years before trying?

Tried using a torque wrench on every bolt for a full month

Last month at the shop in Denver I decided to torque every single bolt on every bike that came through. Brake calipers, stem bolts, derailleur hangers, the whole deal. Took way longer than my usual 'good and tight' method, but after 45 bikes I had zero come-backs for loose parts. Normally I get at least 2 or 3 complaints a month. Has anyone else tried this and stuck with it, or does the time cost drive you crazy?

I think the whole tubeless tire craze is overhyped

I've been running clinchers with tubes for 15 years at my shop in Columbus and I still see more issues with tubeless setups than benefits. A customer came in last month with a brand new tubeless system that wouldn't hold air after 3 rides, we found 4 punctures from tiny glass shards. With a tube, that's a $6 fix in 10 minutes, but with tubeless, I had to clean the sealant mess and patch the tire from the inside. The sealant dries out after 2 months in Ohio weather, and half the riders don't check it until it's too late. Everyone says tubeless rides smoother, but I've done back to back tests on the same gravel loop and the difference is barely noticeable with good tire pressure. Has anyone else dealt with more roadside failures from tubeless than it's worth?

Heard a loud pop on a test ride last week and found a cracked head tube

I was checking out a used bike at a shop in Denver and took it around the block. When I hit a small bump, there was this sharp crack noise from the front end. Turned out the head tube had a hairline fracture near the bottom bracket shell, get a good light and really inspect those weld joints before you roll anything out the door. Has anyone else run into frame failures that looked fine at first glance?

Hit 1000 tube changes in a single season last summer and my hands still hurt thinking about it

I kept a tally on my shop wall just for fun and was honestly shocked when I hit 1000 tubes swapped between May and October. Most were from goatheads out here in Colorado but a solid chunk were people running tires way too soft for their weight. Didnt realize how much repetitive grip work actually messes with your forearms until I couldnt hold a coffee mug straight by November. Anyone else ever track specific repairs over a season and see a number that caught you off guard?

Hit 5000 flat repairs in 8 years at the shop, never thought I'd count that high

I was logging a tube swap yesterday and my repair counter rolled over to 5000. Bet half of those were from goatheads on the local trail. Anyone else keep a running tally of something dumb like this?

My shop foreman told me to stop using Park Tool grease for everything, he was right about that one thing

Hit 500 full tune-ups last week without really noticing

Was going through my invoice book from 2023 and counted 500 tune-ups I did out of my van last year. That's like 10 a week on average, which honestly blew my mind because some weeks I feel like I'm barely scraping by. I work mainly around the Twin Cities area and most of those were for people just wanting their commuter bikes running smooth for spring. Has anyone else ever actually gone back and counted what they do in a year? It's kind of wild to see it on paper.

Appreciation post: The Park Tool truing stand I was sure would be overkill

I borrowed my buddy's old wheel truing stand for two years and thought it was fine, then finally caved and bought a Park Tool TS-2.2 for $180 used last month and the difference in precision is wild, now I can get wheels true to under half a millimeter in ten minutes. Has anyone else noticed a huge jump in quality from their old gear to a pro-level tool?

Found a trick for getting stubborn disc brake rotors true

I was fighting a wobbly rotor on a customer's bike last Tuesday, the kind that rubs no matter how much you bend it with a standard adjusting tool. After about 20 minutes of frustration, I pulled out a small crescent wrench and used it as a lever against the caliper body to apply even pressure. It sounds crude but it worked way better than the proper tool because it didn't slip off the rotor edge. Anyone else have a weird tool that works better than the purpose-made one?