Questions tagged [gears]

Gears in the drivetrain of a bike.

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52
votes
5answers
98k 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 ...
43
votes
11answers
25k 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. Apart from being heavier, how much will I lose in performance if I use hub gears?
35
votes
5answers
12k 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 ...
33
votes
5answers
8k views

Why are most bicycle gears designed to have so much overlap

For bikes with a front derailleur, I've noticed that the gearing ratios of most bicycles are not linear, and there is an odd "overlap" between those power ratios as you switch from one front gear to ...
25
votes
6answers
5k 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?
22
votes
4answers
6k views

Pedaling at different gear ratios on flat terrain: what's the point?

I have seen many cyclist pedaling at different gear ratios on the same (flat) terrain and cruising at (roughly) the same speed. They move quite fast, but when I look at how fast they pedal, I realize ...
21
votes
4answers
66k views

Help Me Understand My Bicycle's Gears

I've recently started commuting with a bicycle (Giant hybrid bicycle). I've been trying to learn a little about bicycling to make my commute easier and my time on the bicycle more enjoyable. Please ...
18
votes
6answers
7k views

Does riding high gear up a hill damage a recumbent bike?

I have a recumbent trike with 26 gears. While normally I would shift to a low gear when going up a hill, I found that I can go up hills in the highest gear, the configuration that gives me the fastest ...
18
votes
5answers
16k views

Always cycling in highest gear, why?

For all my life I have noticed that I always cycle in the highest gear (most of my bikes had at least 3x7, so it wasn't a lack of options) whilst most serious cyclists cycle on relatively low gears ...
18
votes
8answers
12k views

What is the simplest way to lower the gearing on my touring bike?

I have a 2004 Jamis Aurora with a 52/42/30 triple and an 11-32 cassette in the back. 30x32 (25.3 gear inches) being the lowest gear is frustrating for the hilly terrain where I live (e.g., 7% grade ...
16
votes
4answers
3k views

10 gears to singlespeed

My second hand Hercules bicycle came with 10 gears. Two gears in the front and five in the back. The gearshift does not work well and since I cycle in the same gear all the time anyway, I consider ...
15
votes
3answers
2k 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?
14
votes
5answers
8k views

Worries about a gear ratio of 1:1?

I'm planning a randonneur-like bike with drop bars, STI shifters, and nevertheless some low gears. The crankset could be a "compact plus" (I guess from Sugino), 44 and 28 teeths, and the cassette a ...
13
votes
2answers
6k views

How efficient is string bike? Is this really a revolutionary bike?

Bicycles are getting evolved with good technologies or methodologies as the period changes. Now, this one bike, so called string bike has been introduced, which doesn't have chain, derailleur but ...
12
votes
7answers
7k views

What is the purpose of so many gears?

My bike, which I love dearly, has 21 gears, which appears to now be standard among mountain bikes. Is that truly better with a bike that has, say, 7 gears? And why is it that the amount of gears a ...
12
votes
12answers
71k views

While pedaling standing up, bike crank gives in as if shifting, what is causing this?

While standing up and pedaling, the cranks give in as if shifting. It seams like I am shifting down, but my hands are off the shifter, almost like the chain is skipping a link. I took it to a bike ...
12
votes
5answers
66k views

Why does my gear slip when going uphill / standing?

I have a road bike that I use to commute ~6 miles to work every day. Some of the portions of the ride are at a steep incline, and I've noticed that when I get up to stand on some of these hills, my ...
12
votes
3answers
4k 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. ...
12
votes
2answers
1k 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 ...
11
votes
6answers
12k 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?
11
votes
7answers
8k 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 ...
11
votes
3answers
2k views

What is the generic name for the gear shifter where you have one trigger for the up shift and another for down shift?

I recently bought a bike with new advanced gear shifters where you can shift easily as the shifter has a trigger for the up shift and downshift? I would like to replace the twist shifter in my old ...
10
votes
5answers
4k views

My bike goes up one gear at a time, but down two: is this normal?

Just over a year ago I bought a new bike (a Giant Escape 3) with a trigger gear system - my previous one had a grip-twist to change gears. After riding and experimenting for a while, I was able to ...
10
votes
2answers
17k views

Moving tfrom Shimano 9- to Shimano 10- speed

I'm thinking of changing the 9-speed Tiagra rear mech on one of my (road) bikes to something, still Shimano, but 10-speed. The obvious replacements I'll need are cassette, right-shifter and chain. ...
10
votes
3answers
9k views

What is the impact of changing to a smaller chainring?

My road bike has a Campagnolo Veloce gearset. It's running 53 and 39 tooth chainrings. I have a 13-25 10sp cassette. I find that a lot of the time when I'm cruising, I'm on the big chainring and in ...
10
votes
2answers
2k views

Is there a difference between big chainring and big sprocket, and small chainring and small sprocket?

I am using a road bike as commuter its and old bike and have weird front gear selection 52 and 42. So I took it to work this morning and thought that for a change I will ride it on big gears. While I ...
9
votes
8answers
21k views

How to position a bike for work without a stand

I want to tweak my gears, from time to time: Adjust my front and rear derailleur limits, see if the shifts are smooth, make small adjustments on the cable tension, and so on. Is there any way to get ...
9
votes
7answers
17k 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 ...
9
votes
9answers
57k views

Chain slipping on newish bike

I've looked at most of the answers for related questions and they all speak about replacing parts that are old. I just bought a new bike from a friend who rode the bike for about a month before ...
9
votes
4answers
7k views

Chain skipping on some gears

I have an old cruising bike with 21 gears. A few months ago I was pedalling back home when my chain broke, and I was only able to get the chain replaced this week. After having it replaced I noticed ...
9
votes
4answers
15k 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
3answers
5k views

Can double chainrings be used with a clutch-type rear derailleur?

I've been reading up on Sram's CX1 1x11 cyclocross-specific group. It hinges on two technologies to minimize the potential for dropped-chains/chainslap. The CX1 clutch rear-derailleur keeps the chain ...
9
votes
3answers
10k views

Bike not changing correctly between two gears

I have only recently started riding to work and I've been given a bike by a friend which is in reasonably good shape. For the way things are working out I keep the front gear in the same position and ...
9
votes
1answer
1k views

I find that I'm always in my highest gear. What options to I have to re-distribute the ratios to a more useful range

I have three gears in the front and 8 in the back, but I always use the highest gear (I live in a flat place) I might drop down one or two gears occationally but this is only a small fraction of the ...
9
votes
2answers
518 views

How to check the gear before renting a bike?

I don't own a bicycle. Whenever I go cycling, I would need to rent one. The first thing that I always check is to see if the brakes are working properly. Sometimes, I have no idea that the gear is ...
9
votes
5answers
6k views

Compact crankset, how to use and criticality of cross chaining

I have a road bike with 50/34 compact crankset and 12/27 10sp cassette. While I don't think I could run a 53/39 one given the hills I happen to climb, but sometimes I get the feeling the right gears ...
8
votes
6answers
2k views

Group of Bikes: Is 3x1 an option?

I'm an RA for a dorm that is considering buying a number of bikes that would be owned by the dorm and lent out to students. I will be at least in part responsible for maintaining the fleet (about 10 ...
8
votes
6answers
13k views

Why are there almost no bikes with a single chainring?

Bikes with two or three chainrings are the norm, and then there are singlespeeds, but except for kids' bikes, you see almost no stock bikes with a single chainring in front but a cassette and ...
8
votes
3answers
2k views

When to shift gears on a hybrid bike?

I know what gears do what (what makes pedaling easier or harder), but my sister and I are having a debate on when exactly to shift. I think I read somewhere that it is better to shift when coasting or ...
8
votes
2answers
8k views

Do I have Direct Mount or Hanger Mount?

I'm very very new to bicycles and obtained a little project for me to work on, hence the amount of rust on the parts currently but I'm not sure if I have a direct or hanger mount derailleur? I'm 100% ...
8
votes
4answers
28k views

Best bicycle for a moderate to extremely hilly suburbs?

I've moved to an area that's notoriously hilly. I had gained a lot of weight but managed to ride it off by cycling in a well built but extremely faulty and wastefully heavy chinese bike. The gears ...
8
votes
2answers
2k 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 pedal. How do I fix this?
7
votes
6answers
3k views

Unable to pedal when in high gears

I'm a complete novice with bicycle maintenance and have a slight problem. I just picked up a 2nd hand bike as taking part in a charity event this weekend and an unfortunate accident meant my mine was ...
7
votes
4answers
62k views

Special hub requirements for an 11-speed group

In a question earlier today (Changing cassette from 8 to 10 or 11 to meet the Shimano 105 5800 groupset) the Op asserts that they would need to change their hub, if they wanted to go from a 10- to 11- ...
7
votes
5answers
3k views

Are single-speed bikes better equipped to handle cog/chain wear?

I need to decide between a single-speed and multiple-speed bike. I usually ride multiple-speed mountain/city bikes in the highest gear anyway (around town). They're not intended for that, and doing ...
7
votes
1answer
1k views

What does a gear 'spinning out' mean?

I'm asking as I'm reading Sean Kelly's autobiography, where he uses the expression when he and his team were at the front of the peloton, trying to reel in a breakaway: It was a long, long chase ...
7
votes
3answers
38k 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 ...
7
votes
2answers
884 views

Rear derailleur cage bigger than cassette necessity

I use a Shimano Ultegra 6600 rear derailleur with short cage in a 11/28 cassette. The derailleur is at the end of its useful life and would like to exchange for a cheaper one, since I intend to ...
7
votes
4answers
331 views

Electronic shifters

I have been reading alot about the electronic shifters that are out now, specifically the ones on TREK bikes. I was wondering if they are worth the price, and more importantly how do they perform.
7
votes
4answers
2k views

Comparing gear ratios on different bike types

How can I compare gear ratios on different wheel sizes? How can I compare gear ratios on MTB with tracking bikes with bigger wheels? How can I compare gear ratios with gear hubs?