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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
4 answers
4k 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 ...
2 votes
2 answers
48 views

Are these 2 Gates Carbon Rohloff CDX and CDX-EXP rear sprockets interchangeable?

My bicycle came with a Gates CDX-EXP rear sprocket. Online I can only find the CDX variant. And I was hoping to use the CDX variant. Here images of the 2 parts and links to the manufacturers website. ...
3 votes
1 answer
241 views

Moving rear sprocket outward

I'm trying to fit a Veer Split Belt to my old city bike. However, I have noticed that the front and rear sprockets are not well aligned. I can't move the front sprocket inwards, so the only way to ...
2 votes
1 answer
3k 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
3 answers
3k 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 ...
1 vote
1 answer
151 views

Chain / Chain wheel: D type vs sealed type

I have spent a good 30 minutes on this site but couldn't find anything pointing a clear idea. I bought a 26 inch, Dual suspension bike. It has a chainwheel of "sealed type." I asked the ...
1 vote
1 answer
72 views

Used mongoose BMX started having issues with rear sprocket not engaging when pedaling causing safety issue

I got a used Mongoose BMX for my son. I know when I was younger Mongoose was halfway decent. But now they kinda stink. Putting that lightly! Anyway the bike rode well at first, then after a flat tire ...
5 votes
4 answers
822 views

GRX 2x11 - what causes the chain to bounce significantly when shifting the cassette into a higher gear (smaller sprocket)?

I recently set up a new gravel bike with all new components, including a 2x11 GRX DI2 drivetrain. 31/48 and 11-36t. It has ridden under 600 miles and only seen rain once. It is accident free and has ...
3 votes
2 answers
115 views

How would i go about removing this gear cluster?

bike noob here. Looking to remove this freehub and I don't see the removal tool groves. I’m not sure how to remove this and I can’t seem to find any info on this specific one. The brand is Suntour ...
2 votes
0 answers
183 views

Bicycle chain roller diameter size chart?

I'm digging for a while now, and can not find any helpful chart for chain roller diameters e.g. Shimano 8,9,10,11,12 speed. It differs of course depending on the manufacturer and the purpose. We know ...
3 votes
3 answers
351 views

What are the replacement options for my Miche cassette?

I have a sprocket with chipped teeth. It's on a Miche Primato ten-speed cassette ("Fac Michelin PRIMATO 12/25", in the catalogue) with a Campagnolo Mirage groupset. The hub is labelled ...
1 vote
1 answer
6k 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 ...
0 votes
2 answers
5k views

Vibration feel on pedals

For a while, I am having a vibration feeling (and actually it vibrates) through my feet from chain. It is not because of front derailleur, I have just aligned them. There are no problems with rear ...
7 votes
1 answer
713 views

Should the chain diverge that much?

I bought a new bike that has: 11-speed SRAM NX cassette. Single chainwheel: 36 SRAM NX teeth 11 / 42 cog. KMC X11 chain with quick-release. Rear derailleur: SRAM NX 11-speed. Anti-derailment ring. ...
4 votes
2 answers
304 views

105 R7000 chain rubbing bigger sprocket when pedaling backwards

I am new to this so I wanted to know if this behavior is normal. When I pedal backwards and the chain is on the smallest sprocket I can see that the chain rubs for a second and then does a little jump....

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