the cable tumbler on your derailleur. if you turn it the proper direction it will take up the slack in the cable. otherwise you can release the derailleur cable bolt a bit and pull. follow the derailleur manufacturer’s instructions for the installation of the derailleur and you shouldn’t have too much trouble.
also you might want to look up park tool’s helpful video on sizing chain.
blueyesidfn on
This is not the highest gear
th3_eradicator on
That cable is punk rock. Something doesn’t look right with your derailleur, or your chain is way too long.
Careful-One5190 on
Your chain is too long. Look at Park Tools videos for chain sizing. The common “L/L +2” method almost always works perfectly.
frogs_fear_me on
This is called “cross-chaining,” meaning you’re in the small chainring (front) and small cog (rear). This is a gear combo you should never use.
That said, there’s a whole lot of chain slack here.
willdallas2020 on
Anyone telling him to fix that by adjusting a screw should never give bike advice again. That chain is 7 links too long
CargoPile1314 on
How did you size the chain?
drewbaccaAWD on
If the chain goes slack when you are in the small-small combination, then either the chain is too long or you’ve exceeded the chain wrap capacity of the rear derailleur.
hongos_me_gusta on
1. that’s not the bike’s highest gear. highest gear is larget chainring & smallest rear cog
2. your chain is too long. watch youtube for hiw to remove the chain link (the specific link meant to easily open) and properly size a chain. save the left over chain links for emergency repair.
xycm2012 on
Shorten the chain. Only right answer here.
Last-Extension-4924 on
if your on the smallest gear in the back, you need to be on the largest in the front, that keeps the chain taught.
biker2035 on
You would never run that combination, so not a concern. Of course getting the right chain length is easy enough with a quick google search.
19 Comments
You shorten your chain
Your derailleur is not mounted properly.
[removed]
Try B screw adjust
the cable tumbler on your derailleur. if you turn it the proper direction it will take up the slack in the cable. otherwise you can release the derailleur cable bolt a bit and pull. follow the derailleur manufacturer’s instructions for the installation of the derailleur and you shouldn’t have too much trouble.
also you might want to look up park tool’s helpful video on sizing chain.
This is not the highest gear
That cable is punk rock. Something doesn’t look right with your derailleur, or your chain is way too long.
Your chain is too long. Look at Park Tools videos for chain sizing. The common “L/L +2” method almost always works perfectly.
This is called “cross-chaining,” meaning you’re in the small chainring (front) and small cog (rear). This is a gear combo you should never use.
That said, there’s a whole lot of chain slack here.
Anyone telling him to fix that by adjusting a screw should never give bike advice again. That chain is 7 links too long
How did you size the chain?
If the chain goes slack when you are in the small-small combination, then either the chain is too long or you’ve exceeded the chain wrap capacity of the rear derailleur.
1. that’s not the bike’s highest gear. highest gear is larget chainring & smallest rear cog
2. your chain is too long. watch youtube for hiw to remove the chain link (the specific link meant to easily open) and properly size a chain. save the left over chain links for emergency repair.
Shorten the chain. Only right answer here.
if your on the smallest gear in the back, you need to be on the largest in the front, that keeps the chain taught.
You would never run that combination, so not a concern. Of course getting the right chain length is easy enough with a quick google search.
1) confirm your derailleur is mounted correctly as in [Step 2](https://si.shimano.com/en/pdfs/dm/RXRD001/DM-RXRD001-01-ENG.pdf)
2) confirm that your chain is the correct length using the [Shimano Guidelines](https://bike.shimano.com/stories/article/determine-chain-length.html)
3) perform adjustment of the b-screw as shown the link from step 1
I can also see the housing cracking and you should likely replace the housing and cable while your at it.
I know your LBS will know what to do
Take it to the bike mechanic