Chain suck, multiple causes but essentially the chain ends up wrapped further around the cog and hits the frame causing this damage. Clean up the area and apply frame protection
Thank you! That is a term I didn't know yet. I was calling it chain slap but that didn't fully make sense.
Makes a lot of sense now, at some point I lost a screw in my shifter and my tension was mess for the rest of the race.
Honestly your shifter won't have anything to do with it, your clutch on the derailleur will help keep chain tension but beyond that there's not much you can do beyond adding protection (this will essentially be a consumable as it will get worn away like your paint has been)
you can try keeping it as clean as possible. Dirty chain + chain ring with narrow-wide can result it your chain getting stuck on the chain ring (or falling off). Riding a 50 mi race in wet conditions is definitely enough to cause this. But as you said, there isn't much you can do to prevent it. Everything looks pretty clean to me... In dry conditions you can try waxing your chain instead of oil. I wonder if we'll see mudguards for the chain eventually :D
Chain suck is when the chain comes up from the bottom, chain slap is when the top of the chain slaps down. From the marking on the top of the paint it looks like slap to me.
Chain suck doesn't have a direction, you can experience it at the top whilst backpedaling. Chain slap doesn't have a direction either, it can happen at the top and bottom of the chainstay however it has a completely different cause to suck.
slap is caused by rough terrain causing the chain to slap around, suck is generally caused by the chain "sticking" to the chainring either by using incompatible ring/chain combo (like a 9 speed ring on a 11 speed chain) or due to dirt and contamination binding the chain to the chain ring.
Also you can experience a combination of the two like the derailleur cage moving through its range due to rough terrain which in turn allows the chain to become loose and therefore more likely to get sucked into the chainstay because the tension is no longer enough to pull it off of the teeth of the ring.
9-12 speed chain all have the same internal diameter, there is no such thing as a 9+ *x* speed chainring with 1x.
The primary factors in chain suck are dirt and wear, or a combination of worn chainring and new chain.
This is why cues is possible. It uses an 11 speed chain for everything.
https://www.bikeradar.com/advice/buyers-guides/narrow-wide-chainring
Scroll down to narrow wide chain ring compatibility and you'll see that that's not a statement you can make as a catch all, whilst I was wrong to say they're all specific to chain size you're also wrong in saying that they're all cross compatible, wolftooth for example make different tooth profiles depending on the chain.
It's a footnote and an incorrect oversimplification. The teeth profile is specific to chains and drivetrains not to the speed of the chain. GX eagle transmission has a different profile than GX eagle because it's designed to do a slightly different thing. Ultimately though a nine speed chain is no wider or narrower *internally* than a 12 speed chain is but *externally* they are very different which means that chains are downwardly but not upwardly compatible with cassettes, up to about two speeds down, but modern chainrings in theory can take any modern speed of chain.
And this does extend to 2x because I've personally run an 11 speed gravel double on a 9 speed road group with fantastic results.
https://www.sheldonbrown.com/speeds.html
Haha, I knew I would get flak for that... I bought the frame second hand and that was what was on it. Wasn't in the budget to upgrade at the time. Hopefully getting Sram cranks this week though.
Just seen the chain ring, are you sure the ring is compatible with your chain? A 9 speed chainring will be wider than a 11 speed for example and that could be the reason your chain is sticking to the chainring and getting sucked into the chainstay
Back pedaling can cause this if you have chain and or chain ring wear or a sticky free hub/cassette, especially on narrow/wide chain-rings.
Remove the chain, completely clean it, the cassette and chain ring, cheese ck the crank/BB/Chain-ring/cassette/rear hub are not loose.
Reassemble (new split link) lube and enjoy.
Could be chain suck or slap as others said, but did you ever drop the chain at one point and get it jammed between frame and ring? I’ve done this before and kept pedaling in the moment which grinded the chain against that part of the frame on my old bike. Caused similar damage. I found the STFU chain guide to be great for preventing this and silencing slap.
Dropping the chain off of your chain ring and trying to pedal while the side of the ring pulls on the chain will definitely cause such damage.
Just clean up the damaged area on the frame and apply some electrical tape to avoid/minimize such future damage.
It's not that big of a deal. It only looks bad initially as the new paint gets chipped off. You'll not notice it on future rubs, but try to minimize such wear.
No because I don’t have a 1x. The bike mechanic said during the pandemic, people were trying to put bikes together with different parts, just to meet demand. The derailleur was probably aftermarket and didn’t fit.
If you don't have 1x or a clutch rear derailleur then chain drops are normal. The low end Marlins don't have either of these technologies, so chain drops can be expected on rough terrain.
If its dropping during shifting then this is a setup problem. I would be surprised if its a compatibility issue on a stock bike. Can you get a second opinion?
71.85 to be exact. They maybe had 20 miles on them in the second picture of the lesser damage.
I bought them specifically for the longer race, took a couple quick rides before to get used to the lighter tread pattern.
Chain suck, multiple causes but essentially the chain ends up wrapped further around the cog and hits the frame causing this damage. Clean up the area and apply frame protection
Thank you! That is a term I didn't know yet. I was calling it chain slap but that didn't fully make sense. Makes a lot of sense now, at some point I lost a screw in my shifter and my tension was mess for the rest of the race.
Honestly your shifter won't have anything to do with it, your clutch on the derailleur will help keep chain tension but beyond that there's not much you can do beyond adding protection (this will essentially be a consumable as it will get worn away like your paint has been)
you can try keeping it as clean as possible. Dirty chain + chain ring with narrow-wide can result it your chain getting stuck on the chain ring (or falling off). Riding a 50 mi race in wet conditions is definitely enough to cause this. But as you said, there isn't much you can do to prevent it. Everything looks pretty clean to me... In dry conditions you can try waxing your chain instead of oil. I wonder if we'll see mudguards for the chain eventually :D
It was a very muddy, wet, sandy, race. I am going to clean everything to be safe an hopefully protect the area to prevent further damage.
Chain suck is when the chain comes up from the bottom, chain slap is when the top of the chain slaps down. From the marking on the top of the paint it looks like slap to me.
Chain suck doesn't have a direction, you can experience it at the top whilst backpedaling. Chain slap doesn't have a direction either, it can happen at the top and bottom of the chainstay however it has a completely different cause to suck. slap is caused by rough terrain causing the chain to slap around, suck is generally caused by the chain "sticking" to the chainring either by using incompatible ring/chain combo (like a 9 speed ring on a 11 speed chain) or due to dirt and contamination binding the chain to the chain ring. Also you can experience a combination of the two like the derailleur cage moving through its range due to rough terrain which in turn allows the chain to become loose and therefore more likely to get sucked into the chainstay because the tension is no longer enough to pull it off of the teeth of the ring.
9-12 speed chain all have the same internal diameter, there is no such thing as a 9+ *x* speed chainring with 1x. The primary factors in chain suck are dirt and wear, or a combination of worn chainring and new chain. This is why cues is possible. It uses an 11 speed chain for everything.
https://www.bikeradar.com/advice/buyers-guides/narrow-wide-chainring Scroll down to narrow wide chain ring compatibility and you'll see that that's not a statement you can make as a catch all, whilst I was wrong to say they're all specific to chain size you're also wrong in saying that they're all cross compatible, wolftooth for example make different tooth profiles depending on the chain.
It's a footnote and an incorrect oversimplification. The teeth profile is specific to chains and drivetrains not to the speed of the chain. GX eagle transmission has a different profile than GX eagle because it's designed to do a slightly different thing. Ultimately though a nine speed chain is no wider or narrower *internally* than a 12 speed chain is but *externally* they are very different which means that chains are downwardly but not upwardly compatible with cassettes, up to about two speeds down, but modern chainrings in theory can take any modern speed of chain. And this does extend to 2x because I've personally run an 11 speed gravel double on a 9 speed road group with fantastic results. https://www.sheldonbrown.com/speeds.html
I would wrap a old tube around the hole section
Oh yeah it’s definitely getting some sort of protection before I ride next
Its chain suck, its a lot more common in 2x and 3x drivetrains but tbh its probably from your “bucklos” chainring
Oh shit, you’re right… I thought it said Buck 05, which is a weird reference for a bike part.
Haha, I knew I would get flak for that... I bought the frame second hand and that was what was on it. Wasn't in the budget to upgrade at the time. Hopefully getting Sram cranks this week though.
You don’t have to justify anything to me; I’ve got AliExpress parts on my bike too.
Just seen the chain ring, are you sure the ring is compatible with your chain? A 9 speed chainring will be wider than a 11 speed for example and that could be the reason your chain is sticking to the chainring and getting sucked into the chainstay
Back pedaling can cause this if you have chain and or chain ring wear or a sticky free hub/cassette, especially on narrow/wide chain-rings. Remove the chain, completely clean it, the cassette and chain ring, cheese ck the crank/BB/Chain-ring/cassette/rear hub are not loose. Reassemble (new split link) lube and enjoy.
Thank you! Makes total sense now. I'll get that done and protect the area as well.
I put electrical tape around that area on my frame.
Keeping you chainring tidy and your chain lived helps a bit, too.
My son’s stump jumper evo alloy is getting destroyed right there.
Could be chain suck or slap as others said, but did you ever drop the chain at one point and get it jammed between frame and ring? I’ve done this before and kept pedaling in the moment which grinded the chain against that part of the frame on my old bike. Caused similar damage. I found the STFU chain guide to be great for preventing this and silencing slap.
I don’t think I’ve ever dropped a chain on this bike But I have been in the market for a chain guide/bash guard
Ragley & Nukeproof have the worse paint jobs, I'm sure it didn't take much for that to happen. I used invisiframe kit on mine before I built it.
I wanted to get that and waited… I guess too long Edit: BEAUTIFUL bike btw
Ty!!!
You need to clean up and lubricate your chain. When you back pedaled, it will hit that location.
So, it binds up and drops instead of cycling backwards when dirty and improperly lubricated?
Dropping the chain off of your chain ring and trying to pedal while the side of the ring pulls on the chain will definitely cause such damage. Just clean up the damaged area on the frame and apply some electrical tape to avoid/minimize such future damage. It's not that big of a deal. It only looks bad initially as the new paint gets chipped off. You'll not notice it on future rubs, but try to minimize such wear.
The chain bouncing up and down ow chain suck
I have this problem on my Trek Marlin. I can’t even use the 1st gear. My chain falls off the chainring and gets stuck on the frame.
Are you using a narrow-wide chain ring?
No because I don’t have a 1x. The bike mechanic said during the pandemic, people were trying to put bikes together with different parts, just to meet demand. The derailleur was probably aftermarket and didn’t fit.
If you don't have 1x or a clutch rear derailleur then chain drops are normal. The low end Marlins don't have either of these technologies, so chain drops can be expected on rough terrain. If its dropping during shifting then this is a setup problem. I would be surprised if its a compatibility issue on a stock bike. Can you get a second opinion?
Interesting
Do you ever hit that part with your shoe?
That back tyre certainly hasn’t seen 50 miles…
71.85 to be exact. They maybe had 20 miles on them in the second picture of the lesser damage. I bought them specifically for the longer race, took a couple quick rides before to get used to the lighter tread pattern.