Gears in the drivetrain of a bike.

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9
votes
2answers
12k 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. ...
6
votes
4answers
4k 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 ...
5
votes
4answers
26k 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 ...
9
votes
1answer
973 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 ...
30
votes
5answers
9k 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 ...
7
votes
9answers
41k 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 ...
4
votes
4answers
11k views

Type of cycle for losing weight and staying fit for a beginner [closed]

Over a year ago I was diagnosed with a collapsed arch in my left foot and despite trying many times I have not been able to get back on the treadmill. I have been thinking of getting a bicycle to ...
0
votes
2answers
1k views

8 speed shifter with 7 speed cassette

I just got a bike with broken hanger and derailleur. As the owner didn't want to put money in good parts, I installed a cheap Sunrun derailleur compatible with index, and a new hanger. Just after I ...
10
votes
10answers
31k 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 ...
6
votes
5answers
2k 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 ...
5
votes
3answers
807 views

rear shifter lever gets stuck when shifting gears

All the shifting was working smoothly until my bike fell off to the ground (edit1: to my right side hitting the right side of the bike) with me couple days back. Now after about a week when I took my ...
3
votes
2answers
319 views

Rear gears don't turn anticlockwise

I've taken the rear wheel off my bike but the rear gears are stuck and do not spin freely anticlockwise. It had been out of use for about 4 days, kept in a dry garage. I took the wheel off because it ...
0
votes
2answers
307 views

What to upgrade to achieve a higher top speed?

I enjoy going fast and my current bicycle tops too early, what kind of upgrades would I need to make to achieve a taller final gear?
-4
votes
1answer
122 views

Closely spaced nonoverlapping 36 (2x12x2) gears borrowing from music theory. Good idea?

I had an idea. Why not space gears on a bike the same as musical notes? For example, in music, if you start on a certain note (let's say C3), you need to go up 12 more half steps (notes) to get to ...
35
votes
5answers
61k 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 ...
17
votes
4answers
41k 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 ...
31
votes
7answers
12k 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?
15
votes
6answers
9k 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 ...
6
votes
6answers
2k 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
5answers
4k 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 ...
6
votes
1answer
1k views

Shifters and internal gears

I have an Airnimal Joey with 8 (internal, Shimano Inter 8) rear gears. I wanted to install drops handlebars and the shifters. I got the Shimano Sora ST-3300-8 Right / Rear 8 Speed Shifter, which I ...
4
votes
3answers
2k views

Efficient gear shifting

I've recent purchased a road bike bit of a classic with the downtube shifters, lugged steel frame etc etc. Before I mainly road my fixie, thou I do have another geared bike, but it left a bit to ...
4
votes
3answers
5k views

Can I drop-in a compact crank set with my current 105 groupset

I live near a lot of hills and am fairly new to biking. In my lowest gear I still can't keep up at an efficient pedal rate on the hills. I found out they sell "compact cranksets" which in addition ...
3
votes
3answers
5k views

Which gears combinations shouldn't be used?

Is there any general rule or recommendation to avoid usage of certain gears combinations (for 2xN and 3xN gears systems)? Do they differ for mtb and road bikes? I know that it's recommended not to ...
2
votes
2answers
3k views

Can't shift front gear, despite loosening, tightening, etc. What could be wrong?

Disclaimer: I'm clueless and am piecing together what little information I know from reading this site and from watching YouTube 'intro to repair' videos. I've been gifted a used mountain bike, my ...
8
votes
3answers
7k 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 ...
6
votes
4answers
900 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?
6
votes
3answers
2k views

How can I increase the highest gear ratio?

I am looking for some higher cog front gears for an old bike I am considering. I've been away from it for some time and don't know the current number of cogs on the front ring, but I am looking to ...
5
votes
4answers
249 views

The shifter for the front derailleur is “soft” in my vintage bike

So I bought a used vintage bike. I just love the bike and it's awesome. However it came with one problem: gears problems. First of all I have very little experience with bike, especially gears (...
5
votes
4answers
22k views

Can I fit a cassette with a larger range with my Shimano Tiagra 10-speed ( GS-4600) derailleur?

I'm currently running a 2x10 shimano tiagra 10-speed drivetrain with a 50/34 compact crankset, a 12-30 rear cassette, and a Shimano Tiagra GS-4600 derailleur (that's medium cage aka road long cage) on ...
4
votes
3answers
98 views

Adding gears to a childs trike pickle pashley

I'd like to add gears to my disabled son's pickle pashley tricycle. I have made a start by adding a 5 speed casette, but I'm stuck trying to work out how to shift the gears as there is no where to ...
4
votes
2answers
203 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
votes
1answer
196 views

Chain overshoots cog when shifting from low to high gears

Hi when shifting from low to high gears my chain is overshooting the cog and jumping into the next one. I tried turning the low limit screw outward to move the derailer in towards the low gears but it ...
2
votes
1answer
3k views

Bicycle slipping gears on middle sprocket gears 4-7

I see lots of questions on gears slipping but not sure it's the same as what I have. Out of 21 gears I only have problems with 4 (middle sprocket (2) on left shifter gears (4-7) on right shifter). ...
2
votes
1answer
184 views

Can an IGH have the same maximum overdrive-ratio as a crank-sproket setup?

Is there an IGH that gives one the maximum overdrive-ratio that one might get with a 39-53T crankset and a 11-34T freewheel? If not, what is the mechanical roadblock in making one ?
2
votes
3answers
610 views

How to get a lower gearing

My trusty old CF racer was stolen the other day, and I'm looking for a replacement. I saw this bike at PlanetX and was intrigued. It's a full carbon bike with (last years) Ultegra components for a ...
2
votes
2answers
11k views

Shimano Revoshift repair

My bike has a grip shift (Shimano revoshift) which isn't shifting through all 8 gears. Even with the gear cable removed (it recently broke) it will only shift through half of the gear numbers and ...
2
votes
2answers
198 views

Triple chainring + nonstandard sloped cogset. Can this work?

It seems that on my mountain bike and all other multispeed bikes I have seen having a rear cassette or freewheel all have sloped cogs, meaning they go from largest to smallest in order of decreasing ...
2
votes
2answers
144 views

Half speed internal hub gear?

Rather than resort to radical gears such as a very small granny chainring (such as 20T) and a very large rear cog (40T), both of which can cause some problems for derailleurs as well as other problems ...
1
vote
2answers
17k views

Difference between Shimano HG51 8-Speed Cassette and Shimano HG50 8-Speed Cassette

Can anyone tell me the difference between Shimano HG51 and HG50 8-Speed Cassettes? I can't find any information online about this so was hoping someone might be able to help me. I am looking to ...
1
vote
1answer
611 views

SLX chainring compatibility

I'm considering swapping the inner ring on my SLX double chainset (M665) from 22T to 28T. I noticed that the newer M675 has a 40/28 option, so I figured that the 28T chainring from this set-up would ...
0
votes
2answers
291 views

I need to change my bike from UK to US Spec

I bought a bike from the UK. The brakes and shifters are on the opposite sides. I want to change it so the front brake is on the left and the rear is on the right, Same thing for the shifters. I ...
0
votes
2answers
172 views

Hypothetical 1x10 simplification to 1x3 or 1x5

This is a hypothetical question that will help viewers (including myself) better understand gears and their limitations. Suppose someone sees a bike they like at a local bikeshop and it just happens ...
-2
votes
1answer
118 views

Left side isolated granny gear, right side all other gears? Possible and practical? [closed]

To me, the left side on a bike that doesn't have a rear disc brake is being somewhat wasted. So how about this idea... on the right side have the normal gears but on the left side, have a ...
-4
votes
1answer
101 views

Super close ratio high gears via double size sprockets… practical?

I am wondering why they use such small cogs on a bike. Problem with that is as you get down below about 15 teeth, you cannot get precise steps to the next gear. For example, you can go 15 to 14 or ...