c/bicycle-mechanics

Tension headache: I snapped a chain mid-ride in Austin, then another one 3 miles later

I was hammering up a hill near Town Lake when my chain let go, snapped clean at the pin. Fixed it with a quick link, got back going, then the same thing happened on the next climb. My question is, are cheap chains just that bad, or was I doing something wrong with my indexing and tension from the start, has anyone else had a double snap like that?

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calebw50•1d ago

Realized I was tightening BB cups with the wrong tool for 2 years

Been using a basic pin spanner on cartridge bottom brackets, wondering why they kept creaking after a month. Finally borrowed a shop's proper BB tool at the co-op in Portland and holy cow, the cups went in flat and solid. Has anyone else struggled with cheap tools causing noise that you blamed on the parts?

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thomas291•7d ago

Cheap torque wrench bit me, glad I caved on the nicer one

I got a $35 beam torque wrench off amazon and it was way off, stripped a stem bolt on my gravel bike. Shop let me use their digital one and the difference was night and day, so I paid $150 for a CDI and now I actually trust my builds. Anyone else get burned by budget tools early on?

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matthewh28•11d ago

Torque wrench calibration nearly cost me a frame last week

Last Tuesday I torqued a stem bolt to spec with my Park Tool TW-5, snapped the bolt clean off, and the bar rotated into the top tube before I caught it. Turns out the wrench was 30% off after 3 years of daily drops in the van. Sent it in for calibration, the tech said he sees this constantly, especially with beam type heads. Has anyone else had a trusted torque wrench drift that bad, or am I just unlucky with my abuse?

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taylor_flores•12d ago

Bottom bracket creak took me 3 weekends to chase down in Tucson

I got this intermittent creak on my commuter bike in Tucson, only when I pedaled hard out of the saddle. First I torqued the cranks, then the pedals, then the chainring bolts, even swapped the seatpost. On Sunday number three I finally pulled the whole crankset and found a hairline crack in the BB shell, right where the frame was welded. Took about 6 hours total of messing around in my apartment for a 10 minute diagnosis once I actually looked close. Has anyone else burned that much time on a creak that wasn't the bottom bracket at all?

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andrewt41•13d ago

I swore by steel ball bearings for years, ceramic actually won me over

Picked up a used hub with ceramic bearings last spring just to test them, figured I'd be swapping back within a week. After 600 miles of winter gravel in Portland, they're still spinning smoother than any steel set I've had, no regrease drama. Anyone else make the switch and find it was more than hype?

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felix155•14d ago

Found a cracked dropout hidden under paint on a 2020 frame, check yours

Last month I had a customer bring in a bike that just felt off in the rear end. Nothing obvious, no wobble at the wheel. I pulled the rear wheel and the dropout area looked clean, but the paint had a tiny hairline bubble. Sanded it down and there was a crack running about 2 inches along the dropout. Frame was a 2020 model, so it was out of warranty anyway. Bike was never crashed, just ridden hard on gravel. Took me 3 hours to find it because it was hiding under the clear coat. I've already checked 5 other bikes from the same batch and 2 have the same issue. Has anyone else seen cracks like this on that era of frame, or know what causes them to start under the paint?

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ramirez.sage•18d ago

My old 3-in-1 cable cutter was the problem, not me

For like 8 years I fought with housing and cable ends, always blaming cheap parts or my shaky hands. Last month I finally bought a proper Park Tool cable cutter after my buddy Shawn watched me struggle and said 'dude, your tool is toast.' The difference is night and day. My old cutter would crush the housing instead of slicing clean, leaving those little burrs that made shifting feel mushy. Now I get a perfect cut every single time and the cables slide through housing like butter. I used to file every housing end after cutting, now I don't even check them. Has anyone else had a basic shop tool secretly hold back their work for years?

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elliot_grant38•19d ago

Torque wrench click lied to me on a carbon seatpost clamp

I torqued a seatpost clamp to 5 Nm on a customer's bike last Tuesday, heard the click, but the post slipped an hour later, so I checked the wrench against a digital gauge and it was reading 1.2 Nm high, has anyone else had a trusted torque wrench drift like that?

1 comments

amy_foster56•20d ago

Rotors warped after one hard descent, should I switch to bigger discs?

I took my gravel bike down a long mountain pass near Asheville last weekend and by the bottom my front rotor was pulsing so bad I could feel it in my teeth. It was a 160mm on a 200lb rider with loaded bags, probably braking the whole way down. Do you all think going up to a 180 or 203mm rotor on the front is the fix, or am I just dragging the brakes too hard in the first place?

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joseph_coleman•21d ago

Torque wrench calibration is the shop's biggest lie

Overheard a guy at the co-op say his 15 year old Park Tool was 'close enough' after dropping it on concrete. Took mine in for a $40 calibration check after 3 seasons and it was off by 20% at 5 Nm, has anyone else found their head units drifting that bad?

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blair_allen•21d ago

Shop press versus torch and hammer, which do you trust for crusty old steel frames?

I had to replace a headset cup on a steel frame from the 80s last month, the kind that's pressed in tight like it's welded. My coworker Dave said to just heat the frame and tap it out with a drift, the way he learned in 1995 at a shop in Portland. I went with buying a cheap clamp-on press kit for $140 instead, and honestly it fought me for two hours because the frame is ovalized worse than I thought. Dave's method would have wrecked the paint on this collectible, but I still wonder if I wasted money on a tool I'll barely use. Has anyone else had to pick between saving a frame's finish and spending cash on a specialized tool, and what did you go with?

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phoenix_campbell88•21d ago

Heard a customer 'fix' his own bike with a hammer, now I check everything twice

Guy rolls into the shop yesterday in Portland with a bent derailleur hanger, says he 'straightened it out' with a framing hammer. Charged him $40 for a new one after I showed him the crack in the aluminum. It got me thinking, how many times do we trust a customer's story about what they did before actually looking? Has anyone else had a 'quick fix' from a rider turn into a bigger repair than the original problem?

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rowan_butler93•24d ago

Tried a torque wrench on my old steel frame, surprised myself

I've been turning wrenches for about 20 years, mostly on vintage bikes. Always did bottom brackets and cranks by feel, never bothered with a torque wrench. Last week I borrowed a decent one from a buddy to check my old Raleigh, and it turned out I was running the crank bolts way tighter than spec. The bolts weren't stripped, but the spider had microfractures I never noticed. Lesson learned, even old school stuff benefits from a little precision. Has anyone else found hidden damage after finally using a torque wrench on older parts?

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gavins43•24d ago

Lost a customer over a seized seatpost in Portland

Had a guy bring in a vintage steel frame with a seatpost stuck solid for like 15 years. I tried the usual tricks, heat, penetrating oil, even made a DIY puller with a threaded rod from Home Depot. After 3 hours of fighting it, I snapped the post clean off inside the frame. Told him it needed a machine shop to drill it out, cost around $120. He got mad, said I should've warned him about the risk upfront, and left without paying. His buddy now does his own work. Has anyone else had a customer bail after a repair went sideways, or do you always set expectations before touching seized parts?

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jordancoleman•27d ago

Regular customer finally let me fix his 14 year old shifting issue

Had a guy come in last Tuesday with a 2011 hybrid he bought new. He always said the gears just felt crunchy and it was normal. I took it on a test ride and the cable was stretched about half a centimeter, plus the rear derailleur hanger was bent 2 degrees. Showed him with my Park Tool gauge and he just stared at it for a minute. Said he had thought for over a decade that he was just a bad shifter. Rebuilt it in 20 minutes and he rode around the block twice, came back laughing. Anyone else get customers who put up with a mechanical issue for years because they think it's their own fault?

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burns.ruby•28d ago

That cheap brake bleed kit cost me a full hydraulic system

Picked up a 25 dollar bleed kit off Amazon to save a shop visit on my MTB. The fittings stripped after one use and the hose cracked during the bleed, so I finished the job with brake fluid all over my garage floor. Took it to my local shop in Portland and they said air got into the lever, which killed the master cylinder. New lever and caliper rebuild ran me 180 bucks plus labor. Has anyone else gotten burned by bargain bleed kits or am I the only one who learned this the hard way?

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roberts.jordan•29d ago

Took the cheap route on cable cutters, no regrets after 2 years

Everyone at the shop said buy the $120 Snap-On cutters, but I grabbed the $35 Park Tool ones from the hardware store in Tulsa. They've cut through maybe 300 sets of housing without a frayed end or a skipped bite. I keep them sharp with a quick file pass every few months. Anyone else running budget tools that hold up fine?

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umaf44•1mo ago

Finally got my spoke tension gauge technique down after 20+ wheels

Honestly, I used to just go by feel and had way too many trueing stand comebacks from customers. After Tim from the co-op showed me to always calibrate at the rim bend and do 3 passes, my last 6 wheel builds have been dead straight. Anyone else struggled with the Park Tool tension meter reading inconsistently?

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wren826•1mo ago

Swapped my bench grinder for a spindle sander on brake pads

Used to hand-file every pad until my wrist gave out after 3 sets. Now I knock them down in 2 minutes flat with a 1 inch spindle and the finish is way more even. Anyone else running this setup for pad shaping?

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mia_singh24•1mo ago

Just realized my shop's tire levers used to be the weak link, now they're not

I run a small repair bench out of my garage in Tucson. For two seasons I kept snapping those cheap plastic levers on tight road tires. Like, every other tubeless install. Switched to a metal set with a curved tip after a customer's rim got gouged. Night and day. The leverage is different, you can actually roll the bead off without fighting it. What do you all use for stubborn tires, or do you just rely on technique and a good thumb?

2 comments

valsullivan•1mo ago

Serious question, why do people overtighten headset bearings?

I just had a guy bring in a bike where the headset was so tight the bars would barely turn. He said he'd watched a video and cranked it down to stop wobble. Waste of 20 minutes of his time and mine. The top cap just needs to remove play, not clamp the fork tight. How do you explain this to customers without sounding like a jerk?

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calebw50•1mo ago

My old shop foreman told me to stop using grease on pedal threads and it fixed my headache

For YEARS I was putting grease on pedal threads before installing them because that's what I always did. He pointed out that pedals actually need anti-seize or dry threads because grease makes them loosen over time. Has anyone else been doing it wrong this whole time or am I the only one?

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the_elizabeth•1mo ago

Customer told me my truing stand was way off after I did his wheel 3 times

Guy came back with a Park Tool gauge and showed me the rim was out by 1.5mm on the drive side, so now I check lateral runout with a caliper before touching the spokes.

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ryan_clark40•1mo ago

I finally stopped using Park Tool chain breakers after 8 years

Always swore by the Park Tool ones because that's what I learned on in Denver at a shop. Then a buddy let me borrow his Pedro's chain tool and it just felt smoother, no stripped pins or bent links. Anyone else had a brand they were loyal to that turned out to be not all that?

2 comments