What position should the rear derailleur be in?
Push the body of the derailleur until it’s as close to the wheel as it’ll go. The jockey wheel cage shouldn’t be able to move further than a position directly below the largest sprocket. Turn the screw clockwise until the derailleur is unable to move beyond this point.
How close should my derailleur be to cassette?
Just get the guide pulley as close to the bottom of the cog as possible without it making noise. But as cassette ratios get wider, the recommended gap has ballooned from 1-2mm to 5, 6, 7, or even 8mm depending on the set up. The larger the tooth count difference between the top two cogs, the more space you’ll need.
Should my derailleur be straight?
A perfectly straight derailleur hanger should always be at a right angle to the rear axle when observed from the rear of the bike. When a derailleur hanger is bent it is said to be “out of alignment”. A misaligned hanger results in poor shifting.
Why is my derailleur touching my cassette?
Most derailleurs will drag on the top cog of a 34 t cassette when the bike is upside down, but not when it’s right-side up. If it does it when it’s right side up, shorten the loop of cable on the derailleur. Shortening the housing loop is not the best idea. You should adjust the b-tension screw.
How do I know if my derailleur hanger is straight?
Rotate the arm of the alignment tool to the 12 o’clock position (pointing straight up). If your hanger is straight, the gauge arm should sit in the same position relative to the rim. If it’s not straight, this will indicate the direction in which the hanger is bent.
Why is my rear derailleur not straight?
A common cause of a misaligned hanger is from the bike falling over to the right side. This pushes the derailleur body inward, bending the hanger. It is often possible to repeatedly re-bend many derailleur hangers. This is because there is very little stress from riding the bike or shifting gears.
Should the front derailleur touch the chain?
A properly adjusted front derailleur should shift the chain between the front chainrings but will not throw the chain off the rings. The basic adjustments for the front derailleur are the height, rotation, limit screws and inner wire tension (index setting).
Should the front or rear derailleur be adjusted 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.
How to adjust the rear derailleur on a mountain bike?
How to adjust the rear derailleur on a mountain bike will be the topic covered. The primary objective here for the limit screw is to stop the chain from entering into the frame or the spokes of your mountain bike. If you tighten the H-limit screw, it will also restrict its limit.
How tight should the clamp on a rear derailleur be?
When the clamp is tight, it adjusts the height and angle at once, so it’s best to tighten it only enough to hold the derailleur in place while still allowing it to be moved by hand.
How does a front derailleur work?
When you need the chain to go back onto a larger ring, the derailleur pushes the chain against the side of the larger ring until the teeth snag it and yank it on. Of course, if your front derailleur isn’t positioned properly, it won’t work as it’s supposed to.
How do you count gears on a bike derailleur?
If you are replacing an existing derailleur on a bike, simply count the number of cogs on your cassette and you’re good to go. If your drivetrain’s speed is an unknown quantity, you can count the number of steps that your shifter runs through and add ‘one’ to determine the number of gears your drivetrain has.