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."

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1answer
66 views

carbon gates belt drive . need to have lower gears to get up steeper hills. best options

I'm planning to go on a long cycle this year and that last 20k is up a steep incline. I noticed i had to walk up the inclines that were steep and i thought i would have got a lot further if I had one ...
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2answers
438 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 ...
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1answer
139 views

Chain skipping on upper pulley of rear derailleur

Background: I have a full suspension mountain bike with SRAM GX Eagle components. I snapped my chain recently, and replaced it with a new one of the same model. Made sure to size it the same as the ...
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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 ...
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2answers
49 views

Using a cassette and derailleur with different sprocket/cog specifications

I am trying to make a cheaper (500ish) bike work with a Tacx Flux (2018 version). According to their website, the Tacx Flux only supports 8-11 speed cassettes, but my bike has a 7 speed freewheel (14-...
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6answers
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Are single chainring mountain bikes usual?

I just bought my son a typical+ mountain bike in a typical Frech sports shop (a BTWIN 530 at Décathlon) and realized that it has only a single sprocket at the front, and 9 sprockets at the back: I ...
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1answer
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Was I just sold a used cassette?

I just bought this Shimano HG41 cassette and I noticed that not all of the teeth and dips between them look the same. You can easily see this in the image that I included if you compare the teeth on ...
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2answers
215 views

Freewheel threading on Miche flip-flop hub

I'm currently building a parts list for a new single-speed bike. In the process, I came across a nice looking flip-flop hub from Miche: The "Primato Pista/Strada" I figured that adding the fixed ...
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2answers
104 views

Damaged cog while taking it off

Damaged my cog while taking it off. Is there any possibility of repairing it?
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5answers
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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 ...
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2answers
509 views

How do I properly torque a track cog lockring?

I see a torque rating is stamped onto a lot of track cog lock rings: However, I cannot find a way to use a torque wrench when tightening the lock ring. All the tools I've found, like Park Tool's HCW-...
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50 views

What might be causing the faulty shifting on my bike?

I bought a used bike that has 8 speed cogs and 3 speed chainrings. The front shifts great but the back regularly fails on the 6th and 5th speeds. I know a bit about adjusting the shifters so I can say ...
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1answer
468 views

How to remove this Mavic spoke cover from the rear wheel?

everybody How do I remove this spline cover from the rear wheel? I'm trying to replace a spoke, but I can't do so because the cover is blocking the way. I've tried using a flathead screwdriver to push ...
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1answer
98 views

How to disassemble pinned sprockets from a freewheel

I have a shimano freewheel like this one Picture taken from Cassette Removal & Installation I need to use separate sprockets from it but I'm not sure how to extract them without causing any ...
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2answers
811 views

single speed freewheel Shimano SF MX 30 vs Shimano SF-1200

What is the difference between: single speed freewheel Shimano SF MX 30 and Shimano SF-1200 ? Why those freewheels donesn't appear on shimano website? P.S. From the pictures it's clear that the ...
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2answers
141 views

Customizing the smallest cog

I am running on a Shimano Tiagra 10 speed (CS-HG500-10) (12T-28T) and (50-34T front). I'd like to change the smallest cog (12T) to something smaller, i.e., 11 or even 10, to improve my sprints. Is ...
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1answer
114 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?
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1answer
49 views

1994 Giant Iguana front sprocket

I have a 1994 Giant Iguana. The teeth on the front sprocket are significantly worn and the middle sprocket is cracked. Are there replacement sprockets for this bike?
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3answers
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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 ...
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1answer
130 views

How can I not break my sprocket next time

My sprocket was doing loud noises and when I looked at it, it looks like this https://imgur.com/gallery/kcISjFd I bought a new sprocket but I want to know, what can I do to avoid these types of ...
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0answers
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Bicycle chainring dropping/ making a click sound. Help! [duplicate]

My bike is a bit dirty but can someone explain whats happening and a possible fix for this issue? a video with the issue on imgur
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1answer
92 views

What is wrong with my bike? Where is this sound coming from?

My mountain bike has 3 sprockets in the front and 7 in the back. Whenever I use the center sprocket in the front there is a clicking sound. I cannot identify exactly where it is from, I don't see the ...
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1answer
61 views

Schwinn Johnny Pro Stationary Loud Noise Near Sprocket

I have an older Johnny Pro. All of a sudden it began making a loud noise, like a bang, from the area near the sprocket. this occurs approximately every 1.5-2 revolutions of the pedals. I have ...
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1answer
304 views

Replacing the largest sprocket in the cassette with a larger one?

Got this nice old bicycle as a gift from friends, and it has 7 sprockets in the cassette, plus a hub-gear mechanism with three gears (only two of these work though.) To come to work I must ride about ...
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4answers
3k views

Can you reverse the sprockets on a cassette to lengthen its lifespan?

I know my bike's rear cassette needs replacing, but before I do that, is it feasible to dismantle the 8 sprockets to reverse their spin? Can you increase the lifespan of a cassette by letting the cogs ...
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2answers
2k views

Upgrading Gates CDN to CDX-EXP

First of all I will start with the fact that I'm completely new to the world of hardware related to bike parts. But I must say I ride my bike a lot. My everyday commute is roughly 40-50 km. I drive a ...
2
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1answer
1k views

7 speed cassette on a Kickr Core

I have a mountain bike with a 7 speeds in on the back cog and 3 on the front. I recently got a Kickr Core. To use with my mountain bike could I use something like a Shimano 7 Speed Cassette, 12-28T, ...
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1answer
24k views

What are the widths of Shimano 8, 9, and 10 speed cassettes?

I was hoping that someone could provide me with the precise Shimano road-bike 8, 9, and 10 speed sizes for the following: Cassette Spacer Width Cog/Tooth Width Maximum Chain Width
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1answer
413 views

Replaced rear axle, now seems to wobble

I was replacing a tyre a couple of days ago, and noticed my rear axle had snapped. So I replaced the axle, just a normal road 10mm x 145mm, it's a basic Shimano sprocket set and no-name aluminium ...
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1answer
1k views

Gates belt drive front sprocket replacement

My Scott Sub 10 (2012) got damaged during transit and requires the front sprocket replaced. I have ordered the part which has since arrived but would like some advice on how to replace this. From my ...
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2answers
1k 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 ...
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2answers
733 views

What is causing the chain skip after chain replacement?

I have a road bike that was converted to single speed with a single sprocket on the read wheel and a single chainring. I had a 3/32 chain which worked perfectly fine. However after many kms and ...
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3answers
19k 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 ...
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1answer
2k 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)...
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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 ...
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1answer
142 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 ...
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1answer
1k 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' ...
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2answers
220 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. ...
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2answers
1k 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?
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7answers
8k views

How to measure chainring / cog wear?

Other than attempting to estimate whether a chainring or cog is worn and needs replaced by eyballing it, is there any way to measure the wear on chainrings or cassette cogs so you can determine ...
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1answer
92 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 ...
0
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1answer
43 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?
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Ever heard of a snapped rear gear sprocket? [closed]

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 ...
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1answer
589 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 ...
2
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1answer
181 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 ...
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3answers
176 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 ...
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1answer
3k 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 ...
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1answer
364 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.
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2answers
240 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 ...
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1answer
136 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 ...