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Gears in the drivetrain of a bike.

13 votes
Accepted

Why do I constantly have to re-index gears?

Derailleur hanger misalignment will tend to reduce the margin for error in the adjustment, and make it hard to avoid certain gears where there's some jumping or noise. …
Nathan Knutson's user avatar
12 votes
Accepted

Does effort require to pedal depend on the gear ratio or the gear inches?

Gear inches. Gear inches are, for better or worse, the most commonly recognized way of making the kind of comparison you're trying to make here, which one is harder to pedal. Gear inches are simply ho …
Nathan Knutson's user avatar
10 votes
Accepted

How to achieve 24t-38t front chainrings

This setup with its 14t jump has most often been done with 104/64 triples, mountain triple FDs, and a bashring or guard in the outer position. Cheating the capacity number on mountain double FDs mostl …
Nathan Knutson's user avatar
9 votes

What is the best gear combo for me on road bike?

A closer cassette will give you the benefit of closer intervals between gears. If you don't need the 34 with the terrain you ride, that is all upside. …
Nathan Knutson's user avatar
9 votes
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Choosing a rear derailleur for 11-42t cassette on a SRAM 10-speed 1x system

One confusing thing here is that SRAM themselves, that I know of at least, have never made or warranted a 10 speed 11-42 1x setup. So you're not going to hear from them or their product documentation …
Nathan Knutson's user avatar
8 votes

What is the generic name for the gear shifter where you have one trigger for the up shift an...

"Trigger shifters" is pretty close to being a standard generic term for them. Basically all English-speaking mechanics would recognize it as meaning the type of shifter and only the type of shifter yo …
Nathan Knutson's user avatar
7 votes
Accepted

Hot water to unjam trigger shifter

It could hypothetically help get them working, but at that point you'll have washed out a bunch of whatever lubricant remains and should replace it with something anyway. When they stop working, the …
Nathan Knutson's user avatar
7 votes

Alternative gear ratio newbie question: Am I doing a mistake for this commuter?

The Shimano Deore and Alivio level 32, 34, and 36t rings in steel are the best there are for people hanging out in those gears a lot for on-road use, and they're cheap too. … you made both sets of changes (34t or 36t mid ring in front, 34 or 36t big cog in back), can the RD total capacity and max cog size handle that and if so, does it still give you access to the climbing gears
Nathan Knutson's user avatar
7 votes
Accepted

What should I do when my rear derailleur cable guide is too narrow?

You need a stepped shift ferrule. You have no reasonable options if you're using compressionless shift housing. On the left is a picture of a 5mm to 4mm one, which Jagwire is the main remaining prod …
Nathan Knutson's user avatar
6 votes
Accepted

How to properly gear compensate for short crank arms?

Being able to easily compare gearing across bikes with different crank lengths is the main reason why Sheldon Brown advocated switching to the proposed Gain Ratios system for expressing bicycle gearin …
Nathan Knutson's user avatar
6 votes

What is this thing called that holds the gear shift cable (not the wire)?

In Shimano-ese, it is part of the "Outer Receiving Unit." You can pull up the exploded view diagram for you specific hub model on techdocs.shimano.com to corroborate what you need. Then you can go …
Nathan Knutson's user avatar
5 votes

How should I gear a 12" wheel on an adult bike?

Using an 8 or 9 tooth BMX cassette hub will get you into the normal useful range for singlespeed gearing pretty easily with a normal large road ring. 53-9 on a 12" gets you about 70 gear-inches for ex …
Nathan Knutson's user avatar
5 votes

New derailleur - shifts up smoothly, or down - but not both

You mentioned replacing the RD and cassette but not the chain. Unless somehow the chain is nearly new already, you should replace it along with the new cassette. Unless it's very worn, it's not likely …
Nathan Knutson's user avatar
5 votes
Accepted

What are all of the speed numbers for a bike?

The gearing range and the interval between available gears tell an equally or more important part of the story. …
Nathan Knutson's user avatar
5 votes

Internal Gear Hub Nexus 7

If you've got the yellow mark dialed and you're shifting only while coasting, and it's happening as you get into the slacker cable tension gears, it is possible there's a kink in the cable somewhere hidden …
Nathan Knutson's user avatar

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