As an Amazon Associate I earn from qualifying purchases.
If your rear derailleur is giving you a hard time, chattering or jumping a sprocket, not shifting, then you might have a misaligned derailleur hanger.
Includes the user manual with complete step by step instructions so you can be sure you're on the right track to smooth gear changing. A bent derailleur hanger can also be the source of drivetrain noise during riding. Get rid of ticks, clicks, and clacks from your rear derailleur by adding this EASY TO USE tool to your maintenance routine.



The gauge bar holds a gauge to mark the distance to the wheel. The gauge is rotated with the wheel to the 3, 9, and 12 o'clock positions, 6, noting any differences in measurements. The results can be checked instantly.

You can perform standardized operations according to the steps in the manual to avoid improper operations. Replaceable 10mm x 1 threaded tip.

With smooth shifting and reduced drivetrain noise, the rider can focus on enjoying the ride rather than being distracted by mechanical issues. Better overall ride quality a properly aligned derailleur hanger can improve the overall ride quality of the bike.
Universal product size 410*165mm. It works for most all kinds of size of wheel. Proper shifting a misaligned derailleur hanger can cause shifting issues such as difficulty shifting gears or the chain jumping between gears. Material bicycle derailleur hanger alignment gauge tool made of durable stainless steel, it is sturdy, corrosion-resistant and rust-proof.

Improve gear ride, help us more accurately adjust our gear change to improve our driving speed. It is compatible with all 20 "to 29" bicycle wheels.

Note: abcd refers to 4 points of the end face of the rim. Accurate and scratch proof: bicycle derailleur hanger alignment gauge ranging tool, stainless steel calibration clear on measuring rod for accurate measurement, rubber at both ends, used to adjust and fix the measuring rod, and the contact of the is wrapped with rubber to avoid scratching the ring.
360° correction: rotate the spacing between the wheel group and the tail, 360° rotation measures the spacing between the wheel group and the tail. Strong material: the derailleur hanger alignment gauge main body is made of aluminum alloy with anodized surface, which reduces the weight while having strong hardness. Lock the rod, accurate thread, clockwise rotate the handle, screw the rod into the tail, closely fit, accurate lock.

Fits all bicycles: suitable for most derailleur-equipped bikes, our tool is adjustable to work with wheel sizes ranging from 20" to 29"+, making it a versatile solution for all your bicycle maintenance needs. Improved precision: our tool is updated with tighter tolerances for improved accuracy, ensuring that you get the most precise alignment every time you use it.
Its precise design and easy-to-follow instructions guarantee a hassle-free and effective solution to all your bicycle drivetrain issues. With our tool, you can ensure that your bicycle's drivetrain remains in top condition for years to come. Versatile compatibility: our tool boasts improved clearance and reach, making it suitable for use on a wide range of frame and derailleur hanger combos, including low clearance thru-axle derailleur hangers.

Suitable range: 26/27. 5/29/700c. Easy to use:the tool threads directly into the derailleur hanger. Most notably with index shifting systems. How to work:the alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm.
1. CycloSpirit
#ad
CycloSpirit Derailleur Hanger Alignment Gauge
#adCycloSpirit #ad - Compatible with 20” to 29”+ wheels, this tool has enough clearance to help you move around the wheel when you are making the necessary corrections on all your bikes. All the noise coming from your drivetrain can be significantly reduced in few easy steps.If your rear derailleur is giving you a hard time, chattering or jumping a sprocket, not shifting, then you might have a misaligned derailleur hanger.
More information #ad
Made of heavy gauge, the derailleur hanger alignment tool is meant for bike shops as well for home mechanics that needs fixing or maintaining PRECISE GEAR SHIFTING. Includes the user manual with complete step by step instructions so you can be sure you're on the right track to smooth gear changing. A bent derailleur hanger can also be the source of drivetrain noise during riding. Get rid of ticks, clicks, and clacks from your rear derailleur by adding this EASY TO USE tool to your maintenance routine.
Brand | CycloSpirit #ad |
Manufacturer | LifeShift #ad |
Height | 3 Inches |
Length | 17 Inches |
Width | 6.5 Inches |
Part Number | DA1 |
Warranty | 2 Years |
More information #ad
2. Park Tool
#ad
Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge
#adPark Tool #ad - Adjusts to fit 20" to 29"+ wheels. Replaceable 10mm x 1 threaded tip. Improved clearance and reach to work on more frame/derailleur hanger combos, including low clearance thru axle derailleur hangers.More information #ad
Upgraded, large inner shaft for added strength. Updated with tighter tolerances for improved accuracy.Brand | Park Tool #ad |
Manufacturer | Park Tool Company #ad |
Height | 3 Inches |
Length | 17 Inches |
Weight | 0.09 pounds |
Width | 6 Inches |
Part Number | DAG-2.2 |
Model | DAG-2.2 |
Warranty | Limited Lifetime Warranty - see Parktool.com/warranty for details |
More information #ad
3. Park Tool
#ad
Park Tool DAG-3, Derailleur Hanger Alignment Gauge, Black
#adPark Tool #ad - Low-profile head fits low clearance thru-axle derailleur hangers and Shimano Direct Mount hangers. Compatible with 16" to 29"+ wheels isO/ETRTO rim sizes from 317 to 630+. Replaceable M10 threaded tip.More information #ad
Brand | Park Tool #ad |
Manufacturer | Park Tool #ad |
Height | 3 Inches |
Length | 21 Inches |
Weight | 2.12 Pounds |
Width | 7 Inches |
Part Number | DAG-3 |
Model | DAG-3 |
Warranty | Limited Lifetime Warranty - see parktool.com/warranty |
More information #ad
4. TEQIN
#ad
Aluminum Alloy Ranging Tool Bike Repair Tool Orange, Bike Alignment Tool, Bicycle Derailleur Hanger Alignment Gauge
#adTEQIN #ad - Provides a simple, accurate means for checking hanger alignment and for straightening hangers that are not properly aligned. Function: proper alignment of a bike's derailleur hanger is important for reliable shifting.The gauge bar holds a gauge to mark the distance to the wheel. The gauge is rotated with the wheel to the 3, 9, and 12 o'clock positions, 6, noting any differences in measurements. The results can be checked instantly.
More information #ad
The alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm. While a derailleur hanger can be bent when a bike is crashed or dropped on its side, even new frames often have misaligned hangers. Provides a simple, accurate means for checking hanger alignment and for straightening hangers that are not properly aligned. The tool threads directly into the derailleur hanger.Brand | TEQIN #ad |
Manufacturer | TEQIN #ad |
Weight | 0.84 Pounds |
Part Number | 6YfIngHK-FQZSP_JCTKTP08-1012-WX |
Model | 6YfIngHK-FQZSP_JCTKTP08-1012-WX |
More information #ad
5. Lkonwee
#ad
Lkonwee Derailleur Hanger Alignment Gauge for 20” to 29” Mountain Biking and Road Cycling Wheels
#adLkonwee #ad - It is compatible with all 20 "to 29" bicycle wheels. Functions- designed to check and re-align rear derailleur hangers which are very often the cause of poor shifting. This tool has enough clearance to help you move around the wheel when you are making the necessary corrections on all your bikes.You can perform standardized operations according to the steps in the manual to avoid improper operations. Replaceable 10mm x 1 threaded tip.
More information #ad
Advantages- the main body adopts stainless steel tube frame, accurate reduction of the original transmission gear position, diamond shaped straightener bar, 360° rotation correction, large inner shaft, high strength, to correct the low clearance of the shaft hanger. Package- 1 x derailleur hanger alignment Gauge, 1 x User Manual. Fits- it is a tool for modifying and adjusting MTB and road bicycle wheel transmission shift.Brand | Lkonwee #ad |
Manufacturer | Lkonwee #ad |
Part Number | HAG-01 |
Model | HAG-01 |
More information #ad
6. Mimoke
#ad
Stainless Steel Bike Repair Tool Straightening Tool for Derailleur Hanger Alignment Gauge, Bicycle Derailleur Hanger Alignment Gauge Tool
#adMimoke #ad - Aligning the hanger ensures that the derailleur moves the chain smoothly between gears, allowing for efficient and reliable shifting. Warranty we offer 2 years warranty on our products. If you have any problems, please feel free to contact us.With smooth shifting and reduced drivetrain noise, the rider can focus on enjoying the ride rather than being distracted by mechanical issues. Better overall ride quality a properly aligned derailleur hanger can improve the overall ride quality of the bike.
More information #ad
Function essential workshop tool that can be used for both measuring and straightening wrong shift brackets, solving a high proportion of shifting problems. Features improved large inner shaft for added strength, Tighter tolerances for improved accuracy. Universal product size 410*165mm. It works for most all kinds of size of wheel. Proper shifting a misaligned derailleur hanger can cause shifting issues such as difficulty shifting gears or the chain jumping between gears. Material bicycle derailleur hanger alignment gauge tool made of durable stainless steel, it is sturdy, corrosion-resistant and rust-proof.
Brand | Mimoke #ad |
Manufacturer | Mimoke #ad |
Height | 2.76 Inches |
Length | 16.34 Inches |
Weight | 1.85 Pounds |
Width | 6.5 Inches |
Part Number | TOOPRE-WGXZQ |
Model | TOOPRE-WGXZQ |
Warranty | 2 year warranty |
More information #ad
7. Lirinsegie
#ad
Lirinsegie Bicycle DAG-2.2 Derailleur Hanger Alignment Gauge Compatible with 20” to 29” Mountain Biking and Road Cycling Wheels
#adLirinsegie #ad - Features: it is a tool for modifying and adjusting MTB and road bicycle wheel transmission shift. Packing list: 1×bicycle Derailleur Hanger Alignment Gauge(as shown). Functions: used to correct the rear variable lug to solve many transmission speed problems, especially the positioning rear transmission system.Improve gear ride, help us more accurately adjust our gear change to improve our driving speed. It is compatible with all 20 "to 29" bicycle wheels.
More information #ad
Advantages: the main body adopts stainless steel tube frame, high strength, accurate reduction of the original transmission gear position, large inner shaft, 360° rotation correction, diamond shaped straightener bar, to correct the low clearance of the shaft hanger. Our products are strictly tested and controlled before leaving the factory, and the quality is reliable. Easy to use: for details, see description.Brand | Lirinsegie #ad |
Manufacturer | qiaomeng #ad |
Part Number | QM-BK-JZY01 |
Model | QM-BK-JZY01 |
More information #ad
8. Entatial
#ad
Entatial Bike Derailleur Alignment Tool, Derailleur Hanger Alignment Gauge Strong Hardness for Bicycle Derailleur Hanger Proofreading
#adEntatial #ad - Usage indicator: hold the derailleur hanger alignment in one hand, one hand open or push the main body specifically according to the tail hook, adjust the data deviation of the measurement rod corresponding to the data deviation of the ABCD point is OK, keep the body steady, the adjustment process may need more subtract.Note: abcd refers to 4 points of the end face of the rim. Accurate and scratch proof: bicycle derailleur hanger alignment gauge ranging tool, stainless steel calibration clear on measuring rod for accurate measurement, rubber at both ends, used to adjust and fix the measuring rod, and the contact of the is wrapped with rubber to avoid scratching the ring.
More information #ad
Deviation measurement: rotate the lock handle, adjust the distance between the measuring rod and the ring, lock the sliding sleeve, adjust the measuring rod, determine the value of the measuring rod, measure the deviation between the tail hook and the ring.3360° correction: rotate the spacing between the wheel group and the tail, 360° rotation measures the spacing between the wheel group and the tail. Strong material: the derailleur hanger alignment gauge main body is made of aluminum alloy with anodized surface, which reduces the weight while having strong hardness. Lock the rod, accurate thread, clockwise rotate the handle, screw the rod into the tail, closely fit, accurate lock.
Brand | Entatial #ad |
Manufacturer | Entatial #ad |
Part Number | Entatiale38ivamdgq277 |
Model | Entatiale38ivamdgq277 |
More information #ad
9. KIEVODE
#ad
Straightening Tool for Mountain Road MTB, Stainless Steel Bike Repair and Maintenance Tool, KIEVODE Bike Derailleur Hanger Alignment Gauge Tool
#adKIEVODE #ad - Its large inner shaft adds extra strength, making it a reliable option for bike shops and home mechanics who need to fix or maintain precise gear shifting. Ensure smooth shifting: say goodbye to not shifting, chattering, and jumping with our derailleur alignment tool.Fits all bicycles: suitable for most derailleur-equipped bikes, our tool is adjustable to work with wheel sizes ranging from 20" to 29"+, making it a versatile solution for all your bicycle maintenance needs. Improved precision: our tool is updated with tighter tolerances for improved accuracy, ensuring that you get the most precise alignment every time you use it.
More information #ad
Built to last: our derailleur alignment tool is made of heavy gauge chrome-plated steel, ensuring long-lasting performance. Plus, the replaceable 10mm x 1 threaded tip ensures longevity and durability. Its precise design and easy-to-follow instructions guarantee a hassle-free and effective solution to all your bicycle drivetrain issues. With our tool, you can ensure that your bicycle's drivetrain remains in top condition for years to come. Versatile compatibility: our tool boasts improved clearance and reach, making it suitable for use on a wide range of frame and derailleur hanger combos, including low clearance thru-axle derailleur hangers.
Brand | KIEVODE #ad |
Manufacturer | KIEVODE #ad |
Warranty | Standard |
More information #ad
10. Vbest life
#ad
Vbest life Bicycles Derailleur Hanger Alignment Gauge,Bike Tail Hook Calibration Tools for Mountain Bicyclered
#adVbest life #ad - The gauge bar holds a gauge which marks the distance to the wheel. The results can be checked instantly. Suit for:2 different colors for you to choose, meet your different needs.Suitable range: 26/27. 5/29/700c. Easy to use:the tool threads directly into the derailleur hanger. Most notably with index shifting systems. How to work:the alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm.
More information #ad
Convenient and quick:Adopting quality structure and telescopic measurement, more convenient and quick, lightweight and compact size. The gauge then is rotated with the wheel to the 3, and 12 o'clock positions, 9, 6, noting any differences in measurements. Function:indispensable tool, can be used to both measure and straighten misaligned derailleur hangers solving a high percentage of shifting problems.Brand | Vbest life #ad |
Manufacturer | Vbest life #ad |
Height | 0 Inches |
Length | 0 Inches |
Weight | 1.04 Pounds |
Width | 0 Inches |
Part Number | Vbest life8raq0tgdxu-12 |
Model | Vbest life8raq0tgdxu-12 |
More information #ad