Rear derailleur body rubs against chain when in highest gear
5 min read
Asked by: Shonda Bennett
Should chain be touching derailleur?
The cage should be positioned very close (1mm to 2mm) to the chain on the inner (bike) side, without causing it to rub. If it’s rubbing, loosen the L screw in very small increments (quarter turns or less) by turning it counterclockwise until the chain no longer rubs while pedaling.
How do I stop chain rub?
Quote from video: If you have your chain rubbing against your outer or inner plate of your front derailleur. There are two limiting screws that control the movement of the derailleur the outer limiting screw that
How do you shift to smallest cog?
Quote from video: I can pedal this around. And if I just manually push the Kait cage. Over like that and now it went down to the smallest cog if the limiting screw was set too tight.
Why is my derailleur hitting my cassette?
When the spring breaks or wears down, the derailleur becomes “weak”, and the chain pulls it forward too much. In some cases, the derailleur assumes an awkward position causing rubbing against the cassette. If you have a bad derailleur spring, the solution is to replace it or buy a new derailleur.
How tight should a derailleur cable be?
Make sure the derailleur mounting bolt is tight, or shifting will be sloppy no matter how well adjusted the cable is. This usually takes a 5-millimeter hex wrench. If you can’t find the exact specification, 5 to 8Nm is the typical range for this bolt.
How tight should shifter cable be?
Quote from video: Once you've done that. And you'll get more than five millimeters of play here as a good indication that your cable is loose.
How do you reset a barrel adjuster?
If barrel adjuster is all the way in or out there will be no adjustment possible. In these cases reset the barrel. Shift to innermost chainring and loosen inner wire pinch bolt. Turn the barrel fully clockwise and back out about 2 full turns.
What is cross chaining?
Cross-chaining is when you’re in your big chainring and the biggest cog on your back cassette, or on your small chainring and your smallest cog. The problem is that this stretches your chain diagonally to its limits, and needlessly so, since you could just shift to your other chainring and find a similar gear ratio.
What gear should you be in going uphill bike?
Low Gear = Easy = Good for Climbing: The “low” gear on your bike is the smallest chain ring in the front and the largest cog on your cassette (rear gears). In this position, the pedaling will be the easiest and you’ll be able to pedal uphill with the smallest amount of resistance.
What does the B screw do on a rear derailleur?
The B-gap or B-tension screw is located at the very back of your derailleur. It pushes against a tab on your frame’s derailleur hanger, allowing you to adjust the distance between your rear derailleur’s top pulley and the cassette.
Should you adjust the front or rear derailleur first?
In a nutshell, adjust the front derailleur first, then the rear. Show activity on this post. If the derailers just need minor tweaking (they are basically in adjustment but are “not quite right”) then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.
What does the barrel adjuster do on a rear derailleur?
That’s a barrel adjuster, which is used to tune the derailleur adjustment. Standing behind the bike, the barrel adjuster is turned either counter-clockwise or clockwise in half-turn increments until the shifting hesitation is cured.
How do you tighten a bike chain with a derailleur?
Locate the derailleur screw that has the letter “B” printed below it. Insert your screwdriver into the B-tension screw. Rotate the derailleur screw counterclockwise to decrease the tension of the chain. Turn the B-tension screw clockwise to tighten the chain around the teeth of the rear sprocket.
How do you adjust B tension screws?
Quote from video: Help out the little fellow by first pulling the derailleur body back make the adjustments that you want and then put the derailleur back in its normal. Position.
What is cross chaining?
Cross-chaining is when you’re in your big chainring and the biggest cog on your back cassette, or on your small chainring and your smallest cog. The problem is that this stretches your chain diagonally to its limits, and needlessly so, since you could just shift to your other chainring and find a similar gear ratio.
How do you tighten a bike chain with a derailleur?
Locate the derailleur screw that has the letter “B” printed below it. Insert your screwdriver into the B-tension screw. Rotate the derailleur screw counterclockwise to decrease the tension of the chain. Turn the B-tension screw clockwise to tighten the chain around the teeth of the rear sprocket.
Where should front derailleur sit?
The front derailleur should run parallel to the chainrings. If it doesn’t, slacken the bolt fastening it to the frame and rotate it into the right position. When directly above the largest chainring, the outside edge of the derailleur should sit 2-3mm above the teeth of the chainring.
How do you adjust a chain guide?
Quote from video: You want to adjust both bolts evenly so that way the rear wheel stays aligned. Here thread your adjuster bolts in or out until you have about three fingers worth the tension here at the chain slider.
Do you really need a chain guide?
Why You Should Run a Chain Guide. Mounting a chain guide on your mountain bike gives you an extra sense of security, hopefully ensuring that you won’t ever drop your chain. When you are flying through rough sections of trail, the chain will jump up and down and can sometimes work its way off the chainring.
Why is chain tension Important?
Proper chain tension is critical to achieving acceptable service life, as excessive tension can cause accelerated wear or chain overload and excessive slack can cause rough chain operation and possibly result in the chain skipping a sprocket tooth, resulting in a catastrophic failure.