Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [sprocket]

A sprocket or sprocket-wheel is a profiled wheel with teeth that meshes with a chain. Bicyclists normally call the front sprocket attached to the cranks the "chainwheel" and the rear sprockets either "sprocket" or "cassette."

3
votes
1answer
46 views

Early Rider Belter hub maintenance

My son has had an Early Rider Belter for around 14 months. Recently, I've noticed the free-wheel sounds "gritty", and there is quite a bit of friction if you move the cranks backwards while the rear ...
5
votes
1answer
68 views

Lockring spacer Shimano cassette

I recently purchased and am now installing a 9 speed Deore XT cassette sprocket (CS-M770) on a Specialized Stumpjumper FSR XC. It's replacing a CS-HG50-9, and is mounted on a Shimano rear hub (FH-M525)...
1
vote
1answer
75 views

Fixie sprockets

this post is a little different to your norm, so I'm not expecting much. I'm partaking in a competition where we are building a chain driven wheelchair and currently have it set-up using bicycle ...
14
votes
5answers
2k views

What are the disadvantages of having an old, worn cogset?

I'm always a little wary of people telling me I should replace things on my bicycle that aren't broken. Because of this, I'd like to know details and symptoms about what happens if I ride my bike with ...
1
vote
1answer
215 views

What is the top sprocket?

I am reading the Shimano specs and I cannot figure out what is the "top sprocket". An example: https://bike.shimano.com/en-EU/product/component/sora-r3000/RD-R3000-SS.html "Low sprocket" (I couldn' ...
5
votes
2answers
847 views

How worn is this chainring?

I have the chainring shown below. It's the front sprocket of an ebike. Does this chainring need replacing or are the teeth still OK?
1
vote
1answer
56 views

Does only Rohloff manufacture the sprocket for their Speedhub 14?

Are there any manufacturers other than Rohloff who make the sprocket for the Rohloff Speedhub 14? Is the sprocket Rohloff specific or is it a standard / general / everyday part?
1
vote
1answer
65 views

How long does a freewheel cog last?

4 months I asked this question when I changed my chain: What can be done wrong changing the chain in a single speed? and the solution was to change the freewheel cog. I decided to "invest" in the not ...
-1
votes
1answer
41 views

Difference between drivetrains

I have a 3x10 speed MTB. Will it be a upgrade or a downgrade to move towards a 1x10 and will I be able to easily ride above 60km per hour as I can with the 3rd gear in front?
-1
votes
1answer
59 views

Widely available cassette cogs: recommendations?

I'm trying to determine what are the most widely used/available cassettes and corresponding cogs. I don't care much whether they are high-end components or low, though I expect the low-end ones to be ...
1
vote
0answers
68 views

Ever heard of a snapped rear gear sprocket?

Has anyone come across a rear gear sprocket snapping before? A clean break straight across the diameter. Happened at bottom of hill but not excessive force by any means. Not new but not terribly old ...
1
vote
1answer
126 views

Should I get a smaller chainring or bigger cog?

I built a single speed bike about a year ago, and am starting to change out parts to make it more comfortable for me. The first thing I'm wanting to change is the gear inches, which I didn't give much ...
1
vote
2answers
68 views

Coaster brake: concave sprocket orientation

The sprocket for my coaster brake hub is shaped concavely in the middle, it is not symmetrical. I've seen some people on Youtube who had it mounted on the hub facing inward, and others facing outward. ...
2
votes
1answer
83 views

How can I know the number of teeths I need to go uphill?

I have a singlespeed with a flipflop hub to change to fixed gear. In my freewheel sprocket I have 16 teeth and in the ring chain 46 teeth. For me this is almost always the perfect combination for ...
1
vote
3answers
121 views

cogs for front wheel

See this wheel. Can I put two freewheel cogs on it, instead of one freewheel and one fixed? (driving clock and anti clock, so both driving forward) Then get this wheel onto front steel fork, by ...
2
votes
1answer
380 views

What do I need to replace my singlespeed freewheel cog?

As I learned in this question, the cog of my freewheel are damaged and should be replaced. I've been searching for some information but I'm still not sure of what I need. At the beginning I though I ...
1
vote
1answer
122 views

I want to get rid of the front gears on my Scott Aspect 740 2016, what size sprocket would fit the stock cranks

I would like to know the cheapest sprocket but good quality to buy to single speed my stock Shimano FC-M300 crank set to get rid of the gears and go "1-by" so its a single speed just on the front.
3
votes
2answers
138 views

Which rear cog should I remove if I want to add a 26 for climbing?

I have an old road bike with 53-39 rings and 13-23 cassette. Although it's generally flat in my area, I like to get to the top of these hills where they put the radio antennas (without dying). Max ...
0
votes
1answer
185 views

Can you use shimano m8000 replacement cogs to replace Sunrace mx80 cogs?

Can one use m8000 replacement sprockets 11T 13T 15T to replace the corresponding mx80 sprockets? I appreciate the clusters can't be switched due 3 free sprockets and 2 clusters of 4 on mx80 vs 5 free ...
3
votes
1answer
123 views

Changed chainset, bottom bracket, wheels and cogset and find these parts left over, and the rear wheel clicking?

I just changed the crankset, bracket, wheels and cogset (my first bike repair obviously) on my specialised tricross, and after my victory tea realised I had these three bits left over, and not sure ...
4
votes
5answers
972 views

Difference between two drivetrains with the same gear ratio?

Given two identical, fixed-gear bicycles, one with a 36/12 gear combination and another with 48/16, will there be any noticeable difference when pedaling these two bicycles? I understand there may be ...
1
vote
2answers
85 views

Campy index shifting

I wanted to go Campy 8 speed STI shifting and a 8 speed freewheel (not cassette) because I have good looking high flange hubs. If I can't get a Campy freewheel what other will work? If none, could I ...
5
votes
1answer
202 views

When shifting gears, how does a bike chain catch the new cog so reliably?

I think I understand the derailleur mechanism pretty well, yet I still find it surprising how the chain catches on the new cog so reliably. Is there something I'm missing? Is it just with the proper ...
4
votes
2answers
106 views

Possible to identify sprocket without taking the bike apart?

I would like to change the chain and sprocket on my Centurion Basic 7 speed, as I have read that it is good practice to change the sprocket when changing the chain. It will be the first time I try ...
5
votes
2answers
175 views

Does too high “B-tension” increase wear

This answer suggests that having B-tension adjusted so that the chain sits far from the cogs increases wear. Can anyone cite a source that says that? Experimental evidence would be preferable, but a ...
3
votes
3answers
280 views

Maillard sprocket: is really this rare?

Due to (understandably) large wear after 16 years of usage, I wanted to replace sprocket, chainwheel and chain on my byke. With my surprise the workshop where I took my byke was not able to find a ...
1
vote
1answer
1k views

My rear derailleur won't shift after up after 3rd cog

I just got a MTB bike thats been sitting in a garage for a couple of months. I tried the bike and found out that the rear derailleur(Shimano) wont shift after the 3rd cog . It shifts up to the 3rd ...
-1
votes
1answer
104 views

It takes several clicks of the shifter to go from smallest cog to next biggest cog, and I get hit the four biggest cogs

When I try to shift from the smallest cog to the next biggest one, I have to shift three times before it moves. Click one and I see the cable tightening. Click two and nothing, and click three and ...
4
votes
2answers
1k views

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

I have a 20x1.75" 6-speed folding bike with 52x14-28t drivetrain. Even with the gearing at 52x14, ~3.71 ratio, I can still pedal uphill. I also have a 700x25C fixed gear with 49x17t gearing or ~2.88 ...
13
votes
1answer
1k views

What are the ridges seen on sprockets and chainrings for?

I've always wondered what these ridges below the teeth on sprockets are for. Can anyone enlighten me?
5
votes
1answer
381 views

What does marking like “aq/ar” on the sprocket mean?

Shimano sprockets are marked with short strings like "aq/ar", "bg", "as/au/be" and others. For example, "bj bk" can be read on the image below: It looks like they mean the hyperglide series to which ...
5
votes
2answers
257 views

Where can I get a sprocket that works with a standard bicycle chain that mounts onto a 5/8" bore rod?

I'm trying to set up a bicycle powered machine (grain mill), and I want to drive a 5/8" diameter shaft with a standard bicycle chain. I'm trying to find a sprocket that is 5/8" bore that fits a ...
4
votes
3answers
8k views

Can an individual gear/cog on the rear cassette be replaced?

I'm trying to figure out how the rear cassette is put together, and I found this related question that suggests at least maybe the lowest gears can be replaced. I'm trying to figure out if in general ...
5
votes
1answer
172 views

Rear sprocket clicks or points of engagement

I'm a dad learning about BMX racing and I want to know what the difference is between a sprocket which the bike shop says as 90 odd clicks, then starts talking about points of engagement. Does the ...
5
votes
1answer
2k views

Which jockey wheel on top?

I've just bought a new pulley set for my rear derailleur but do not know which one goes on the top (nearest derailleur) and which one goes on the bottom. The wheels have arrows on them;vI suppose they ...
1
vote
2answers
145 views

Bike chain slips off sprocket as I pedal during repairs. Any idea why?

I am having an issue with a 26 inch Beach Cruiser. Everything was put together by a bike shop however one of the chains slipped off the sprocket during transport home. When I went to put it back on, ...
6
votes
1answer
297 views

timing chain keeps dropping/derailing only with partner

For a volunteer project biking with blind riders (NiewidomiNatandemach.pl), we've been partnered up and provided a tandem bike, that seems new enough and in good condition. Unlike the guy behind me--...
2
votes
1answer
801 views

Is it possible to use a 9 speed rear shifter with 11 speed cogs/cassette? Is there a disadvantage?

I'm new to biking and I plan to upgrade my bike, but with limited funds I can only upgrade the wheelset and cogs(cassette). Is it okay if I add the 11spd cogs but my shifter is only 9 speed (limited ...
6
votes
4answers
56k views

50/34 vs 52/36 crankset for 11-32 cassette (shimano 105 5800FC)

Following up on this enlightening answer, I would like to know the differences between 50/34(compact), 52/36(mid-compact) and 53/39 (standard). The cassette I am choosing is 11-32 to give me a wider ...
4
votes
2answers
507 views

Diagnose grinding sound from single rear cog

I've got a '70s-era ten-speed road bike with (what I think is) a Huret Eco rear derailleur which shifts well, but for some reason a loud grinding sound emits from the rear of the bike when using the ...
3
votes
3answers
499 views

Cranksets for tandem with internal gear hub

I am thinking about assembling a trekking tandem bike. I would like to use an internal gear hub and put both chains on the right side of the bike. I have some questions about the cranksets: What ...
1
vote
1answer
313 views

When I shift to the smallest cog, it's suddenly too loose

The other day I was riding with the chain on the smallest cog in the back (and the middle chainring in the front) and suddenly something felt like it slipped and the chain was suddenly way too loose. ...
0
votes
2answers
572 views

Cog/Lockring size

I need to determine what cog/lockring size for a wheel. I don't know much about these. I found on the hub the name Dachang. I don't know a size but it is a roadmaster bike.
2
votes
1answer
467 views

Trying to add an extra cog

I am trying to use a multigear bike to make a pedal power bike. I am trying to add an extra cog to attach a chain to connect the motor to. See link.http://www.popularmechanics.com/technology/gadgets/...
3
votes
2answers
142 views

Bike broke, strange parts came out, and doesn't know where to find exact replacement

My friend's bike broke and this thing came out... From various sources I found that it's probably a cog from deraileur. He went to bike shops but none could find a replacement that's for this exact ...
1
vote
2answers
284 views

chain jumping when puilling away in a higher gear

I replaced the rear cog as the chain I had snapped and I thought it had taken some teeth off. Now when I pull away in 1-3 gears it's ok, but if I am in gears 4-7 and I try to pull away ( say I have ...
2
votes
1answer
87 views

What is this cogset body?

I have some backlash (free movement) in my body of cogset, so I try to dissemble my cogset to discover this weird body: I'm trying to find a new one but I don't know how to call it. Any idea how it ...
4
votes
1answer
65 views

Rear sprockets not turning easily

I recently bought a women's Schwinn "Clear Creek" 18-speed mountain bike at a yard sale. The rear derailleur is broken, and the rear sprockets are rusty and don't turn easily against the wheel. I ...
5
votes
2answers
2k views

What does “chain binding” mean?

I'm reading on chain tensioning, the generic idea is that if the chain is too loose it will fall off, if it's too tight it will "bind". I'm having an hard time understanding what "bind" means in this ...
4
votes
2answers
661 views

Why do my pedals shake and pop?

I just purchased a cruiser bike online that I had to assemble. When I rode it for the first time, I notice my pedals felt shaky, whether pedaling or coasting, and when I did pedal every few seconds ...