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21 votes
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Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

What makes a combination hard is the ratio between the size of the front sprocket and the rear one (front divided by rear). The higher this ratio is, the harder the combination is. To make the ratio ...
Rеnаud's user avatar
  • 20.6k
13 votes

Is it possible to replace/regear the front cog? My easiest gear is too easy and I want to try for a higher resistance

You can't just move all the chainrings down a notch and add a bigger one: they'll interfere with the chainstay, which makes this impossible, and it would also be difficult to get the shifting right. ...
Adam Rice's user avatar
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13 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

An example with numbers: Let’s say the chainring (front sprocket) has 40 teeth and your currently selected cassette sprocket in the rear has 20 sprockets. For every turn of the chainring the chain ...
Michael's user avatar
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12 votes
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Cannot figure out how to stop outer edge of front derailleur hitting chain

There are two main factors that decide how much the front derailleur moves Limit screws Cable tension The resulting derailleur movement may be limited by either of them, so you have to get both ...
DoNuT's user avatar
  • 4,496
11 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

Renaud's answer succinctly covers the gear ratio part of your question, so I'll address the gear shifter part. To start from basics, bicycle chain-based transmissions "change gears" when ...
MaplePanda's user avatar
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10 votes

Help choosing right chainset / crankset - commuter looking for a faster top speed

There is quite alot to unpack here. Single chainring (The cog at the front), (Often called 1x, meaning "1 times" rear cogs vs 2x or 3x) has been around for a long time in the MTB world and ...
mattnz's user avatar
  • 50.9k
9 votes
Accepted

Training vs increasing gear ratio

On road, gears much less than 1:1 aren't really quicker than walking anyway. 4.8km/h is a realistic walking pace pushing a bike uphill. With 30:40 you'll ride this at a low - but not unreasonable ...
Chris H's user avatar
  • 59.7k
8 votes

Why can't the Schlumpf Mountain Drive be used along with the 14-speed Rohloff?

If you use the Rohloff Speedhub, then you should use the Schlumpf Speed Drive (not the Schlumpf Mountain Drive). According to the Manual-Schlumpf-Mountain-Drive.pdf Please note, that Rohloff only ...
Michael Altfield's user avatar
7 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

And finally I'd like to address the third part of your question, if I understand it correctly: Why do the large chain rings in the front grow from the inside out (the outermost chain ring is the ...
Peter - Reinstate Monica's user avatar
7 votes

Is it possible to replace/regear the front cog? My easiest gear is too easy and I want to try for a higher resistance

Having a rarely-used grannie chainring is good if you ever strike a climb or big headwind and simply run out of legs. Your chainrings are rivetted together, so they're not easily changed and you'd ...
Criggie's user avatar
  • 125k
7 votes

Is there still production of manual gearbox bicycles?

There is currently to my knowledge one manufacturer of gearboxes: Pinion. Compared to internally geared hubs (IGHs), their flagship product offers more range (max 636%/18 speeds, vs 514%/14 speeds for ...
Rеnаud's user avatar
  • 20.6k
6 votes

Is the gear cycle a sham?

If I am understanding the question correctly, the OP is asking what benefit there is to a multi-speed bike compared to a single-speed bike. The human body acts as a high-torque, low-power engine. ...
Adam Rice's user avatar
  • 30.1k
5 votes
Accepted

Bike chain jumping at lowest and highest gear, fine in the middle

Did you clamp the cable in the correct spot on the deraileur? It's possible with some setups to direct the cable to the incorrect side of the clamp. Which in some cases may change the lever arm a ...
user72590's user avatar
5 votes

Is it possible to replace/regear the front cog? My easiest gear is too easy and I want to try for a higher resistance

Most cheap bikes use a square taper fitting for the cracks and any crank with the same square taper fitting will fit. There are thousands of such cranks available - just search eBay for square taper ...
John Rennie's user avatar
5 votes

Is it possible to replace/regear the front cog? My easiest gear is too easy and I want to try for a higher resistance

Generally, big-box store bicycles aren't worth upgrading. If you get to the point you're riding enough to want an upgrade, it's usually a lot more cost-effective to just buy a better bicycle that ...
Andrew Henle's user avatar
  • 10.6k
5 votes

Bike cable tension not consistent when shifting up as compared to down

This is normally a divide and conquer problem, although on a cheap bike, it could be the sum of a number of small problems - if the latter, be prepared to have your patience tested. First instinct is ...
mattnz's user avatar
  • 50.9k
4 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

Another thing I always wondered was why the gear shifters on each side seem to be opposite to each other as well. On a road bike, there is a "large shifter" and a "small shifter". ...
Eric's user avatar
  • 548
4 votes

Does this chain seem short? Does this photo indicate any obvious drivetrain issues?

Are you on your largest chainring in this picture? (Chainrings being the large cogs by your pedals). I see the chain deflecting slightly between the bottom of the lower jockey wheel (on the right in ...
SSilk's user avatar
  • 4,199
4 votes

Gear won't change to bottom range if set for top and won't change to top range if set for bottom

If you have put a brand new Tiagra derailleur on your bike with 10 speed Ultegra then you have installed an incompatible derailleur. Shimano altered the cable pull for the Tiagra 4700 edition and it ...
Swifty's user avatar
  • 12.8k
3 votes

Training vs increasing gear ratio

Since you want to be faster on climbs (as you clearly stated), you can't cheat physics (it's not meant as an elitist statement). Lower gearing will just give you a comfortable cadence down to (s)low ...
DoNuT's user avatar
  • 4,496
3 votes

Turbo Trainer Cassette vs Bike Gears

The name 8/9/10 speed freehub is in fact misleading. You can use 7 speed cassette on the trainer, but you'll need 4.5mm spacer for that (that you install on the freehub body before the cassette).
Rеnаud's user avatar
  • 20.6k
3 votes

My bike gears are not shifting and I want to manually get it to stay in 1st gear

Given this brief problem description I need to make some assumptions here. If your goal is simply to run your bike in one of the larger sprockets without addressing the actual problem, you could try ...
rellachs's user avatar
3 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

It's easiest to think about chain speed. A big sprocket means slow rotation of its shaft corresponds to a given chain speed. A small sprocket on the other hand means fast rotation of its shaft ...
juhist's user avatar
  • 19.1k
3 votes

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

The physics of simple machines like gears or pulleys is related to levers: pulling on the longer end of a lever is easier, pulling on the shorter end is harder (shorter lever arm). The "levers&...
Peter Cordes's user avatar
3 votes

Training vs increasing gear ratio

Training is always good, but if your gears are too hard for a sustainable pace there is no way around changing your gears. Of course reducing weight would also help on climbs.
Michael's user avatar
  • 27.8k
3 votes

Broken gear shifter case. Is it safe to use?

Without a picture, it is impossible to tell. Unfortunately, safety cannot be described in absolutes. A cracked component is likely less safe than one that is not cracked, but there is big gap between ...
mattnz's user avatar
  • 50.9k
3 votes

Chain drops when shifting up a gear at the front?

I am guessing it drops to the outside of the largest chainring when going from medium to large ring, in which case it sounds like your high limit screw is set too loose. If this is not the case, ...
WornChain's user avatar
  • 1,589
3 votes

Chain drops when shifting up a gear at the front?

This video is a good resource if you want to try front derailleur adjustment yourself: First thing is to assess where the chain drops. In the extreme positions (largest ...
DoNuT's user avatar
  • 4,496
3 votes

How can I add an additional freewheel to the existing solid bicycle axle?

Firstly a quick correction - the freewheel is attached to the hub of the wheel, not the axle. Your axle stays still relative to the frame, and the wheel revolves around the axle on bearings.Upshot,...
Criggie's user avatar
  • 125k
3 votes

Derailleur intermittent rubbing

Check if the bottom bracket is loose. If the bottom bracket shaft (or axle?) just moves a little in the bottom bracket, the gear can bent outwards. If it is not very loose, you might not notice it ...
flukx's user avatar
  • 211

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