27 votes
Accepted

What are the counter-intuitive surprises an amateur bike mechanic encounters, after pedals and cables?

More grease is not always better. Attracts excessive dirt and stuff. Well-greased bearings don’t spin smoothly by hand. Lots of amateur mechanics under-lubricate or use too thin of a lubricant because ...
14 votes

What are the counter-intuitive surprises an amateur bike mechanic encounters, after pedals and cables?

Anyone tinkering with bikes needs to be aware of the perverse variety of standards (how many bottom bracket standards are there now?); that multiple actual sizes can be indicated by the same nominal ...
13 votes
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Why do I constantly have to re-index gears?

The most likely causes are cable friction and derailleur hanger misalignment. Indexing adjustment has gotten more sensitive to both as the speed count has increased. Derailleur hanger misalignment ...
Nathan Knutson's user avatar
11 votes
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Impossible to properly adjust rear derailleur indexing

The number one cause of poor shifting is excess cable friction somewhere along the line. You describe "hesitant" shifting coming down from largest cog to the next. This is a symptom of ...
Jeff's user avatar
  • 9,970
10 votes
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What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets. ...
Argenti Apparatus's user avatar
10 votes
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Shimano Acera hits spokes. Which screw to turn?

You need to adjust the L-Limit screw - Have a look at this Park Tool guide. The problem may also be a bent derailleur hanger. Checking and, if needed, fixing this is best done with a specialized tool, ...
mattnz's user avatar
  • 49.8k
9 votes
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How do I adjust my handlebars to allow me to ride hands free?

Stability of a bicycle is mostly determined by its geometry: primarily the wheel diameter, wheelbase and front fork geometry. If the rider is not touching the handlebar it has very little effect (its ...
Argenti Apparatus's user avatar
9 votes

Why do I constantly have to re-index gears?

Your shift cables need to be replaced, like NOW. This is a very possible symptom of deteriorating cables (as in, starting to fray and eventually snap), which makes sense considering 10 and 11s ...
MaplePanda's user avatar
  • 15.5k
8 votes

How do I adjust my handlebars to allow me to ride hands free?

In short It is part of the design on the bike but if a bike has been damaged the stability of the handlebars gets worse. Personal experience In many years of riding (Dutch) bikes I have noticed a ...
Willeke's user avatar
  • 3,696
8 votes
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Rotor rubs caliper after every ride

Sounds like you are adjusting the position of the wheel axle in the frame drop outs to move the rotor relative to the caliper. Your weight and the forces generated going over bumps will push the axle ...
Argenti Apparatus's user avatar
8 votes
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Are Adjustable Stems With Reasonable Merit?

Whether they work: Short answer yes, they do not have major widespread problems. Most problems that do occur are related to undertightening the bolts on them to start with, or adjusting them without ...
Nathan Knutson's user avatar
7 votes
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How can I tilt up a stem of my bike's handlebar which is held by two bolts?

Adjustable stems follow a couple different design schemes, all of which involve some interlocking toothy bits that hold the angle in place. If the angle isn't changing, the toothy bits are still ...
Nathan Knutson's user avatar
7 votes
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Adjust deraillers after changing chain?

Replacing a chain on a drivetrain that was previously well tuned will not take it out of alignment. Provided that the new chain is the same width and number of links as the old one and that the ...
Carbon side up's user avatar
7 votes

How do I adjust V-brakes as the pads wear?

The rim brakes on my last bike had a barrel adjuster that did what you ask. My new bike has disk brakes and they self-adjust. The barrel adjuster here is the black cylinder on the right-side. The ...
Ross Millikan's user avatar
7 votes

What are the counter-intuitive surprises an amateur bike mechanic encounters, after pedals and cables?

In my experience, BSA and T47 cups are counterintuitive, and it is the right side cups that are left threaded, I.e. opposite to the case for pedals. Note that the original question was more broad, and ...
7 votes
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Can't shift into lowest gear on a new road bike (pics)

Absolutely it's fixable. The L and H screw should never need to be touched normally - they act as stops to prevent the chain going too far and jumping off the cassette. The cassette will end up in the ...
Criggie's user avatar
  • 124k
6 votes

Saddle height for toddler's balance bike

They grow so fast it really doesn't matter, but if the kid looks too low then they are, so go up a bit. Rider should be able to stand over the seat with both feet on the ground. While some balance ...
Criggie's user avatar
  • 124k
6 votes
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Why does my rear derailleur's indexing work for either the high or the low gears, but not both?

When adjusting the tightness of the derailleur cable, it should affect the shifting across the whole range of gears evenly. The way you phrased the question, it sounds like you are experiencing ...
Kris's user avatar
  • 702
6 votes

What can be done to seat post too long/saddle too high?

I think what you are saying is that you need to drop the seat post all the way down into the frame, so the saddle is as close to the frame as possible. You need a seat post to connect the saddle and ...
Argenti Apparatus's user avatar
6 votes
Accepted

Is the part of the v-brake noodle which sticks out of the noodle holder a standard fixed length on all noodles?

Noodles vary a little in their design and dimensions, including the tip area you are referring to that projects past the cradle or holder of the brake. The most important differences in noodle ...
Nathan Knutson's user avatar
6 votes
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Brand-new pedal bearings are almost seized up, should I adjust them or try to "wear them in"?

Imho, you should adjust the bearing preload. You already found the nut and counter nut under the plastic cap. While you're at it, you might want to check if there's enough grease in the bearings. Or, ...
Burki's user avatar
  • 1,248
6 votes

Brand-new pedal bearings are almost seized up, should I adjust them or try to "wear them in"?

Not applicable in your case, but future readers might have pedals which are based on Bushings, not Bearings. Adding for completeness, but your spec page clearly says bearings. Cheaper plastic pedals ...
Criggie's user avatar
  • 124k
5 votes
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Front derailleur takes 6 clicks to shift gears, instead of 3

This is normal. The procedure is called trimming. It allows you to move the front derailleur cage a bit to prevent the derailleur cage rubbing on the chain due to the changing angle of the chain ...
Batman's user avatar
  • 46.2k
5 votes

What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:
Carel's user avatar
  • 8,299
5 votes
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How to tighten v-brake pad without turning it out of position?

I usually just grab the pad with my fingers, and carefully apply torque in the opposite direction of the torque I apply to the screw. The two torques must be roughly equal (very roughly), if you apply ...
cmaster - reinstate monica's user avatar
5 votes

What tool to adjust brakes

Shimano BR-MT520 brakes are hydraulic discs. The alignment can be adjusted by loosening the two mounting bolts. The bolts typically have Torx T25 size heads, so you need a basic T25 wrench at least. ...
Argenti Apparatus's user avatar
5 votes

Is this a helmet defect or not?

The jagged and uneven edges you are seeing around the straps are merely cosmetic. At best they are at the minimum tolerance for manufacturing quality and at worst are an isolated case of tolerances ...
Lien028's user avatar
  • 382
5 votes
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Visible play in the front wheel that is not in the thru axle but in the hub itself? (video included)

Yes, this is play in the bearings. How to fix it depends on the type of hub you have. 'Cup and cone' bearing hubs have ball bearings between fixed cups in the hub and adjustable cones on a threaded ...
Argenti Apparatus's user avatar
5 votes

Impossible to properly adjust rear derailleur indexing

I had the same problem - it seemed that the setup was correct, but sometimes the shifting was all over the place. Tightening the bolt from the rear derailleur hanger to the rear derailleur improved ...
bernhardrusch's user avatar
5 votes

What are the counter-intuitive surprises an amateur bike mechanic encounters, after pedals and cables?

In some Campagnolo chainsets, the central screw for tightening the hirth joint that connects the two halves of the crank spindle is left-handed, quoting the manual: Warning: the titanium central ...

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