Gears in the drivetrain of a bike.

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2
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1answer
1k views

Shimano Nexus Inter-3 internal gear hub stuck in second gear?

The situation My Shimano Nexus Inter-3 internal gear hub is stuck in second gear (it's a 3-gear hub). When I take the external cable housing apart, I can move the pin that goes inside to change gears, ...
7
votes
5answers
2k views

Does gear ratio affect Power?

Let me preface by saying that this may not be the right SE. I considered asking on the Physics SE, but I thought I might try here first. If it is wrong, I am not against it being migrated. From basic ...
27
votes
5answers
31k views

What are the pros and cons of internal gears?

I've had my hybrid 24-speed for a bit over 3 years now, and just last weekend, when looking for a bike for my wife, discovered internal gears. Suffice to say it blew my mind when I saw 7-speed ...
5
votes
2answers
248 views

What's the deal with the axle of my wheels? (or, why is one gear so much smaller than the other?)

I want to put a smaller set of gears on my bike, but looking at the wheel I see that I already have the smallest gear for my axle. Comparing it to another wheel, I found that the other wheel has a ...
11
votes
3answers
2k views

How to avoid wearing out gears?

I have a Specialized Tricross which I bought new last year. In that time (approximately 1K miles), I wore out my chain and gears. At least two of my gears are still slipping, even with a new chain. ...
22
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5answers
1k views

Can you shift both the front and back gears simultanously?

Is it advisable to shift both the front and back gear simultaneously? Can this cause any damage?
4
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3answers
16k views

Heavier Thicker Chains and Gears for Winter due to Salt?

I have two bikes: one having gear-things outside and one with inner-hub. The gear-outside-bike has suffered a lot due to the salt during this winter, the other hilariously looks like a new one. I ...
4
votes
2answers
179 views

Switching from 3x9 Gears to Cheaper Ones?

Alert I am unsure of the right terminology for gear-wheel but I mean the round things near pedals such as 3x9 or typically with 3x7 (3 front, 7 back) mix in commuting bikes. My current gears are 3x9 ...
3
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1answer
4k views

What are the advantage of the different gear shifters

I have just buy for the first time a road bike (Boardman Team Carbon) after long years on hybrids bike and unfortunately due of a injury I didn't have much time to experience with it. The bike has a ...
6
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4answers
3k views

What difference does the range of gear size matter?

I get the idea of ratios and the obvious that a smaller gear on the front and a larger one on the back will give you an easier end result but what difference does the range of a chainset or groupset ...
8
votes
1answer
655 views

Setting chain length

My chain broke and in a moment of silliness (I was cold wet and slightly annoyed) I threw the broken one away before thinking about measuring the new one. Is there a guide to getting the chain ...
3
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2answers
2k views

What's the shortest / easiest “granny gear” available?

What's the range on granny gears - the innermost, smallest front chainring?
5
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2answers
607 views

Do you need to lubricate gears after cleaning gears and chain?

I just cleaned my gears and chain with a biodegradable degreaser. I'm going to lubricate my chain. Do I also need to lubricate the gears or do I just pedal and make sure that I hit all gears? Will the ...
7
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4answers
3k views

How to fix front gear taking 2 shifts just to move onto next cog

I was out on a ride yesterday and several times when I was changing up and down between big chain ring and little chain ring (I only have the 2 rings up front) it required 2 gear changes. The gears ...
9
votes
7answers
11k views

What range of sprockets is useful in a road bike cassette?

My road bike currently has a 27/39/53 crankset and a 13-26 cassette, both of which need to be replaced. I occasionally find myself in both extremes—while heading up the very steep hills of the Bay ...
4
votes
3answers
2k views

Gear indicator on SRAM X5 Shifter shows wrong gear

I have SRAM X5 Shifters like this one: The indicator is now showing the gear above the one I'm actually in, so if like the picture it shows a 2 I would actually be in 1 (the smallest chainring), a ...
11
votes
6answers
5k views

How many effective gears do I have on a 21 speed bike?

I have a 21 speed bike (a hybrid commuting bike). But AFAIK, this does not mean that I have 21 different gear ratios. Is there any way to calculate the different gear ratios?
7
votes
1answer
916 views

Rear Derailleur Cage Lengths

What effect does the length of the cage on a rear derailleur make to bike setup/shifting?
27
votes
7answers
6k views

What's the efficiency of hub gears compared to derailleurs?

What's the efficiency of hub gears compared to derailleurs. I know that hub gears are not as efficient, a part from being heavier, how much will I loose in performance if I use hub gear?
8
votes
1answer
629 views

Chain clicks when the back wheel is in highest and lowest gears

When I have my back wheel gears in either the lowest gear or highest gear, my chain clicks as I peddle. How do I fix this?
14
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3answers
1k views

Should I clean the grease off the gears?

I usually keep my chain well lubricated. However, my gears are usually greasy. Should I be cleaning the gears or are they supposed to be greasy?
28
votes
5answers
7k views

Perfectly setting up gears - how?

Every time I have my bike serviced, the bike shop sets up the gears on a stand in their workshop. The gears change perfectly on the stand, but when the bike is on the road, the rear derailleur doesn't ...