Drivetrain error - why does this happen? #Chainwheel

[HsnA]

Hello,

Whenever I pedal hard my chain seems get buckled/clogged/stuck/grind at the chainring, based on where I feel and hear where it is coming from. If I pedal slow and gentle it seems to operate well but this isn't efficient for someone who likes to sprint most times or stand up to sprint, especially.

I believe the issue may be to do with the wear on the chainrings, I'm surprised because I've only ridden for 4 months and this is a new bike, having had a look it doesn't seem to bad but I can notice the teeth bending in. What do you think?

I've also noticed the chain strucgling to hug onto the sprocket how can I fix this? I believe this could be contributing towards the issue.

PS:I've measured my chainlength to be slightly above 12 inches, this measurement means the chain is loose and needs replacement according to a professional off YouTube, however, chain doesn't seem to have any slack nor does it come off.





[video]https://youtube.com/shorts/dB0Iz-OwmCg? ... pNFYxBh25N[/video]

Thanks

[Eyebrox]

Looks like the cables and derailleurs need adjusted. Not sure about your description of the fault at the chainring but a new bike will benefit from a service (generally free) after a few months of riding. This will address cable stretch issues and minor tweaks to mech controls.

[531colin]

You have worn it out!
What are you lubricating it with??
The natural history of transmission wear is;
the chain wears at the rivets, where it flexes
this makes the chain rollers further apart
the chain rollers being further apart then wear the sprockets to a different profile.

In your second picture, the middle chainring tooth immediately to the right of the triangular feature on the chainwheel you can see the front face of the tooth is worn and metal is turned over at the edge (somebody more IT competent than me, admittedly a low bar, could circle this feature on your picture?)
in your video, it looks like there is a gap between the chain roller and the sideplate....a photo of the chain from above would confirm this.

EDIT....chain brand seems to be "MAYA" ....general price on E bay £5.....possibly not an indication of top quality?

[roubaixtuesday]

It's perfectly possible to wear out a chainset in that time given enough wet miles and lack of lubrication, but seems very unlikely.

I would guess more likely to be rub against the front derailleur; as you apply more force everything bends a bit and if already too close it will rub.

A suggestion to follow the Park Tool guide to derailleur fettling and see if that solves your problem.

Another suggestion to try and be much more specific on what actually happens rather than "buckled/clogged/stuck/grind" which is somewhat all encompassing!

https://www.parktool.com/en-int/blog/re ... adjustment

[plancashire]

If the chain is cheap, may I ask how much you paid for the bike? What make and model is it? I confirm the previous diagnosis: the chainrings are worn out; the big one as well. They look like steel in the photos. If they are worn out they must be very low quality indeed. Worn chainrings is caused by running a stretched chain. It will also have worn out the rear sprockets. You will need an entire new drivetrain.

[hamster]

You have worn the chain out. Fit a new one and then reassess if you have chainset problems. Typically I get through 20-30 chains before wearing out a chainring.

[HsnA]

Looks like the cables and derailleurs need adjusted. Not sure about your description of the fault at the chainring but a new bike will benefit from a service (generally free) after a few months of riding. This will address cable stretch issues and minor tweaks to mech controls.

Thanks all, my bike is a Hiland Daring 700*25C Road Bike - it's a budget bike and I am just a begineer, it's decent but it won't win me the Tour de France.

I took some of Eyebrox's advice, indexed and shifted the gears (haven't touched the cables) which seems to have worked well but after a day or two the whole cassete came lose I assume due to no grease after using WD-40 to degrease the bike during cleaning - I've taken it to the mechanic to get it sorted out needless to say.

I agree with everyone that generally the drivechain has been worn out and needs replacing, I use to lubricate the chain with Olive Oil given I had no cycle oil on hand at the time.

[rareposter]

I took some of Eyebrox's advice, indexed and shifted the gears (haven't touched the cables)

Curious as to how you indexed the gears without touching the cables since the cables control the indexing....

Bottom line is that it's not even a budget bike, it's literally a ride it/throw it away object. The drivetrain looks worn to bits already; those things might as well be made of cheese. With super cheap bikes like that it gets to the point where any repair is already costing close to what the whole bike cost new.

[plancashire]

I took some of Eyebrox's advice, indexed and shifted the gears (haven't touched the cables)

Curious as to how you indexed the gears without touching the cables since the cables control the indexing....

Bottom line is that it's not even a budget bike, it's literally a ride it/throw it away object. The drivetrain looks worn to bits already; those things might as well be made of cheese. With super cheap bikes like that it gets to the point where any repair is already costing close to what the whole bike cost new.

The 14-speed version is selling on Amazon Germany for 220 Euros. You can't make a bike worth having for this. Amazingly, half the over 300 ratings are 5 star, 20% are 1 star. Don't believe them all! If you are on a tight budget second hand is much better value.

[Greystoke]

Don't worry about the comments about low quality. If everything is greased/oiled properly it'll go on and on for ages.
I'd grease the wheel bearings properly....they never put enough grease in.
Adjust everything and keep on top of maintenance and it'll be fine

[Jupestar]

The spec says it has a freewheel not a cassette. If it's moving around you won't get the indexing correct. I think it's unlikely it's loose from the screw on, so could be the internal ratchets. .if it worn anyway probably worth replacing then trying to service it and add grease.

[rareposter]

Don't worry about the comments about low quality. If everything is greased/oiled properly it'll go on and on for ages.
I'd grease the wheel bearings properly....they never put enough grease in.
Adjust everything and keep on top of maintenance and it'll be fine

Personally I think it's worth pointing out the low quality now before the OP spends a fortune trying to fix something that is fundamentally unfixable or that will cost more to fix than to buy new. Adjusting / maintaining bikes like that is difficult because all the parts are such poor quality and have terrible tolerances plus they're made of cheap pressed steel that'll wear out quickly and bend/round off if you try putting a spanner near them.

There's a separate argument as to whether "bikes" like that should even exist but no harm in pointing out the truth.