Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Best Choice THALOUS  New
THALOUS Bicycle Rear Derailleur Tourney RD-TY21B 6/7 Speed for MTB Bike Direct Mount Model: Bicycle rear derailleur RD-TY21B, suitable for 6 speed and 7 speed SIS index variable speed drivesTHALOUS  New
THALOUS Bicycle Rear Derailleur 6/7/8 Speed Tourney RD-TY300 RD-TX800 Altus RD-M310 for MTB Bike Direct Mount MODEL: Bicycle rear derailleur Altus RD-M310, suitable for 7-speed and 8-speed SIS index variable speed drivesDusehu  New
Derailleur for Mountain | 7/8/9/10/11 Speed Rear Derailleur | Transmission Derailleur Accessories for Mountain Bikes Cyc ♐ [ Superior Craftsmanship ] Wear-resistant and lightweight, Bike Derailleur features a one-piece high-strength design,SHIMANO  New
Shimano Rear Mech TY300 6/7spd Direct, Black Shimano TY300 6 / 7-speed rear derailleur (direct attachment)Best Value Shimano  New
Shimano Tourney TY500 6/7-Speed Rear Derailleur Shimano Tourney Rear derailleur compatible with all Shimano 6 and 7 speed shifters. Advanced light action designSHIMANO  New
Shimano Tourney 7/8-Speed Mountain Bicycle Rear Derailleur - RD-TX800-L (Black) The RD-TX800 rear derailleur for 7 / 8 speed features Shimano's double servo-pantograph technology that improves adjustaSHIMANO  NewShimano Tourney RD-TY300B 6/7Sp Rear Derailleur TX models come with Smart Cage which gives MegaRange compatibility with a shorter derailleur cageBEANPRECOY  NewBEANPRECOY 1pcs Bicycle Tail Hook Rear Derailleur Hanger Rear Wheel Mechanical Shift Hook 322175/318610 Aluminum Alloy C 【Function】:Used to replace or upgrade your bicycle tail derailleur hook, protect your bicycle from damage when dropped.Microshift  NewMICROSHIFT Road Bike Rear Derailleur Compatible with Shimano 9 Speed Speeds: 9 Speed, Max Sprocket: 34T, Min Sprocket: 11TSHIMANO  NewShimano Rear Mech XT T8000 T/N SGS 10sp, Black Shimano's Direct Mount compatible derailleur system provides more space around the rear frame removal, making it easierMeghna  NewMEGHNA Bike Rear Derailleur RDTZ31A 6/7 Speed for Outdoor Cycling Mountain Bicycles Direct Mount/Hanger Mount 【MODEL】RD-TZ31-A bike rear derailleur, compatible with 6 and 7-speed SIS Index Shifting drivetrains.BININIU  NewChain Gap Adjustment Tool for Sram XPLR Red/ Force/Rival eTap AXS Chain Gap, for SRAM XPLR AXS26-44, for Road Rear Derai Chain Gap Tool for Sram Rear DerailleurSG Store  NewSG Store Bicycle Rear Derailleur Hanger 65 with Screw 9895-4020 Compatible with Specialized Compatible with Specialized compatible with Demo, compatible with Enduro, compatible with Epic. Replace 9895-4020 and 98Stylrtop  NewStylrtop 2 pcs Bike 11T Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulleys Fit Shimano SRAM (Golden) Anodised CNC machined bicycle jockey wheel with fully sealed bearing for rear bike derailleurs10% Off SHIMANO  NewSHIMANO Black Acera Rear Derailleur RD-M360 Shimano Acera Rear derailleur compatible with all Shimano 7 & 8 Speed shifters. Advanced light action design.bininiu  New2 -Port Battery Charger for SRAM eTap AXS GX Rival XX1 X01 Battery [Front/Rear Derailleur] Charge 2pcs SRAM etap AXS Battery at same timeSHIMANO  NewShimano Sora 3500 Road Bike Rear Mech Derailleur 9 Speed Repairs and maintece are necessary, whether youre a leisure rider or a professional racer.SG Store  NewSG Store 1pc Bikes Rear Derailleur Hanger Compatible with Marin #40 726295 Bikes Compatible with Polygon Compatible with Compatible with Marin Alpine Trail (all), 2019 - 2022, B-17, 2018 - 2019, El Roy, 2021 - 2022, Four Corners Elite, 2019KIEVODE  NewKIEVODE Index Derailleur Hanger Plate for Shimano and SRAM with Nut and Bolt Adapter - Replacement Hanger Part for Rear PERFECT FIT: Suitable for most Shimano, SRAM Rear Derailleurs without a built-in hanger, ensuring a precise and secure fPEUTIER  NewBicycle Derailleur Hanger, Aluminum Alloy Bike Tail Hook Bike Replacement Hanger Compatible with Gt Aggressor Avalanche Package Content: You will get 1 piece of derailleur hanger and 2 screws. Complete kit will meet your needs.SHIMANO  NewShimano Tiagra 4700-SS 10-Speed Short Cage Rear Derailleur Derailleurs & MechsZUKKA  NewZUKKA Bike Rear Derailleur with Hub Bolt 6/7 Speed Direct Mount for Mountain Bike Road Bike Folding Bike Model: Multi-speed compatibility, supports 6/7 speed mountain bike systems, compatible with mainstream vehicles, meetingHouson  NewHOUSON Bicycle Rear derailleur, Rear derailleur 7/8/9/10 Speed Bicycle Rear Wheel Gear Bicycle derailleur for Road Bike 【Package】7/8/9/10 speed bicycle rear derailleurTihebeyan  NewDerailleur Hanger Extender, Rear Derailleur Hanger Extension Bike Frame Tail Hook Extender for 34T-52T (Black) Hollow out style, lightweight and beautiful while ensuring strength. material, strong, durable and has long life.Microshift  NewmicroSHIFT M26C Rear Derailleur - 7/8 Speed Long Cage for 13-34t Freewheel Black Robust composite and steel constructionSram  NewSRAM Eagle T-Type AXS Rear Derailleur Cage Kit - Compatible with All Eagle T-Type Rear Derailleurs, Aluminum Cage Aluminum cage kit for Eagle T-Type AXS rear derailleur without damperVGOL  NewVGOL Bicycle Rear Derailleur Chain Gear Guard Protector Bracket for Most MTB Mountain Road Bike Folding Bike Cycling Pac Function : Provide effective protection for rear derailleur, prevent the derailleur was struck distortion or displacemenGeneric  NewDerailleur | 7 Speed/8 Speed Rear Derailleur - Road Mountain Direct Mount for TX35 ❇ [ Selected Material ] Sturdy, wear-resistant, and rust-proof, Rear Derailleur is made of high-quality alloy material,SHIMANO  NewSHIMANO Ultegra RD-R8000 Ultegra 11-Speed Rear derailleur GS cage, Black, One Size, IRDR8000GS, Grey Compatible with: Shimano derailleur gearPEUTIER  NewBicycle Derailleur Hanger, 5.8x4.1cm Bicycle Tail Hook Bicycle Replacement Hanger Compatible with Gt Aggressor Avalanche Tresc i rozmiar: dostaniesz 1 wieszak na przerzutke i 2 sruby.Rozmiar wieszaka na kaserem wynosi okolo 5,8 x 4,1 cm, a j通用  NewAccessory Replacement Battery for SRAM's etap AXS GX Reverb [Front/Rear Derailleur] Replacement Battery for SRAM's etap AXS GX eagle XX1 X01 Rival Rockshox ReverbBELLIFFY  NewBELLIFFY 1 Set Rear Derailleur Rear Dial Protector Chain Stay Guard Universal Rear Derailleur Derailleur Guard Bike Dera Steel derailleur guard rack: specifically designed for mountain bikes and folding bikes. offers an easy and quick instalHuazu  NewHuazu Rear Derailleur for RD-TZ31-A, Bike Parts Gear Shifter with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicyc MODEL: RD-TZ31-A bike rear derailleur, Compatible with GS 6 / 7 speed SIS Index Shifting drivetrains.Songholee  NewSongholee 2 Set Bike Rear Derailleur Hanger 5.7x2.5cm Aluminum Alloy Mech Derailleur Hanger Hook Adapter Compatible with The bicycle rear derailleur is suitable for most types of bicycles, such as mountain bikes and geared bicycles. It can bSHIMANO  NewShimano GRX RD-RX815 GRX Di2, 11-Speed Rear derailleur, Shadow+, for Double, Black Unisex adult cycling changes.KIEVODE  NewKIEVODE Derailleur Hanger for Giant Avail, Brava, Defy, Envie, LIV, Propel, Revolt, TCR, Thrive and More - Replacement H PRECISE SHIFTING: A worn or damaged derailleur hanger can significantly impact your bike's shifting performance. By replSHIMANO  NewSHIMANO,Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage The Shimano Alivio RD-M3100 Rear Derailleur features Shadow RD technology to keep the derailleur safe from trail obstaclSram  NewBlack Sram X3 Rear Derailleur 7-8 Speed Long Cage Sram X3 is a great beginners or light adventurers rear derailleurBe In Your Mind  NewBe In Your Mind Bicycle Rear Derailleur Hanger Bicycle Rear Derailleur Hook Compatible with Decathlon Rockrider ST520 ST Compatibility: This bicycle rear derailleur eye is compatible with Decathlon Rockrider ST520, ST540, ST900, 500S, compatSING F LTD  NewSING F LTD 1pc Sliver Alloy Rear Derailleur Gear Hanger Frame Drop Out for Cycles Bikes Fits bike models: 2008-2006 Diamondback Edgewood, Kalamar (same years), Maravista (same years),Monona (same years), SorrECSiNG  NewECSiNG 2pcs Bike Rear Derailleur Hanger Aluminum Alloy Frame Dropout Rear Hook Compatible with HTX 29-2015 Compatible wi Compatibility: This product is Compatible with Cross - 2012-2014. Compatible with HTX 29 - 2015, Compatible with Kato HTeMagTech  NeweMagTech Mech Derailleur Hanger Derailleur Hook Bicycle Tail Hook Rear Derailleur Hook Aluminum Alloy with 2 Screws Comp Compatibility: This mech derailleur hanger is compatible with Baracuda Blackfin 2012/Sawtooth 2012, compatible with BianBININIU  NewB Gap Adjustment Tool for Sram Chain Gap Eagle Rear Derailleur, for SRAM Eagle 52T / 50T Cassettes 12 Speed, for MTB Chain Gap Adjustment Tool for Sram Chain Gap Eagle Rear DerailleurDJC Components  NewDJC 12s Bike Ceramic Bearing Pulley Wheel 2pcs Tension for Rival Force AXS eTap T-Type Di2 11T 12T 13T 14T MTB Road Bike 12 speed support, works for Shimano and for Sram. Compatible to 8-12s system.MEGHNA  NewMEGHNA Bike Rear Derailleur 6/7 Speed Derailleur Hanger Mount for Mountain Bike Cruiser Bike Tricycle Folding Bike Kids Model: MG-6/7RD; Bike rear derailleur 6/7 Speed for most kinds of bikes like mountain bike, hybrid bike, kids bike, cruieMagTech  NeweMagTech Bicycle Derailleur Hanger Rear Derailleur Hanger Mech Derailleur Hanger Compatible with Giant ANYROAD ADV/Avail Compatibility: Part number: 380000016, Compatible with Giant ANYROAD ADV (2018-2019), AVAIL ADV (2017-2019), AVAIL ADV PSHIMANO  NewShimano Tourney TX RD TX800 7/8-Speed Rear Derailleur, Black 2016 Mountain Bike Permanent switching performanceYurefax  NewYurefax Replaceable Rear Derailleur Hanger Bike Derailleur Hanger, for Dropout, 133 Bike Derailleur Hanger Fitment: For 133winnerbo  Newfor Mech Hanger Canyon Rear Derailleur #40 EP0716-01 Endurance Infllite Grail CF SLX Derailleur Hanger ESSENTIAL SPARE PART: The derailleur hanger is a critical component of your bike's drivetrain system. Having a spare haneMagTech  NewBike Tail Hook K33009 Rear Derailleur Hanger Rear Wheel Mechanical Shift Hook Aluminum Alloy Compatible with Cannondale Compatibility: This bicycle tail hook is compatible with Cannondale SystemSix 2019.Bestgle  NewBestgle Universal Mountain Bike Shift Cable Kit and Housing Set Bicycle Gear Shift Derailleur Cable Stainless Steel Repl Stainless Steel PTFE coated cables, greater strength, toughness, provide more shift power and smooth operationSram  NewSram MTB X5 Rear Derailleur 8-9 Speed - Medium Cage, Black At the affordable SRAM X5 price point, this rear derailleur is ideal for both trails and city streets. Its use of DirectZIVAYE  NewZIVAYE Bicycle Derailleur Hanger, for Merida One Sixty forty MTB 12x142 Big Seven Nine TEAM Carbon Frame One Twenty 53 M Fitment: for Merida One Sixty forty MTB 12x142 Big Seven Nine TEAM Carbon Frame One Twenty 53 Mech Dropout,Please referEMSea  NewEMSea 2PCS Mech Derailleur Hanger Derailleur Hook Bicycle Tail Hook Rear Derailleur Hook Aluminum Alloy with Screws for Material: Made of aluminum alloy, sturdy and durable, able to provide long-term stable performance.SHIMANO  NewShimano XT M8100 Shadow+ 12sp Rear Derailleur TDR  NewTDR RD-TZ500 Rear Derailleur 6 Speed Direct Mount Eye Mount for MTB Road Bike Shimano Tourney Compatible Bicycle Gear Sh High Compatibility: Designed for both 6 and 7-speed systems, making it suitable for various mountain and road bikes, ensMicroshift  NewmicroSHIFT Sword Black 9-Speed Medium Cage Steel Rear Derailleur, Black Compatible with Sword and Sword Black shifters, as well as Advent and Advent XBe In Your Mind  NewBe In Your Mind Bike Tail Hook 315464 Rear Derailleur Hanger Rear Wheel Mechanical Shift Hook Aluminum Alloy Ear Deraill Compatibility: This bicycle tail hook is compatible with Trek Crockett(Produced in 2014-2017), Emonda ALR/SL/SLR(ProduceMEXWLOP  NewMEXWLOP 1Pc Bicycle Parts Rear Derailleur Hanger, for GT Atidh0233 K33047, for Avalanche, for Zaskar, for Helion Pantera Fitment: for GT Atidh0233 K33047 Avalanche for Zaskar Helion Pantera Mech Dropout Carbon Frame Bike,Please refer to theShimano Deore XT  NewDeore XT RD-M8100 SGS Rear Derailleur, 12-Speed, Black/Gray Fast, shockless shifting and low-profile design.VGOL  NewVGOL 2Pcs Bicycle Derailleur Gear Hanger Bicycle Rear Derailleur Hanger Replacement with Srews 2.24x1.38 Inch Silver Suitable for most mountain bikes and road bikes, it is easy to replace the original tail hook, and it can be used as lonANKROYU  NewANKROYU Bicycle Rear Derailleur 11 Speed High Performance Mountain Bike Shifter Durable Plastic Steel Material Black Lig [PRECISE SHIFTING PERFORMANCE] Experience stable and accurate gear changes with our high performance 11 speed rear deraiSHIMANO  NewShimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black Double Servo mechanism enables the rear derailleur to move in an optimum pathSram  NewSRAM GX Eagle Rear Derailleur Lunar Polar Experience precise and reliable shifting with the thoughtfully designed cage architecture of the GX Eagle Rear DerailleuECSiNG  NewECSiNG 2 Set Bike Rear Derailleur Hanger 5.5x3.4cm Aluminum Alloy Mech Derailleur Hanger Hook Adapter Compatible with La The bicycle rear derailleur is compatible with Lapierre Froggy compatible with Lapierre Zesty, It can be used as a spareShimano XTR  NewShimano XTR RD-M9100 XTR 12-Speed Rear derailleur, SGS Long cage, for 10-51T/single Ring Package Dimensions : 2.33L x 1.55W x 1.09H (centimeters)VOANZO  NewVOANZO 2PCS Mountain Bike Road Bicycle Rear Derailleur Hanger Extension Extender Frame Gear Tail Hook Extender Easy to install.takewell  NewTAKEWELL Chain Gap Adjustment Tool for SRAM Eagle MTB Rear Derailleur, Adjustment Gauge for SRAM Eagle 52T and 50T Casse Chain Gap Adjustment Tool.ECSiNG  NewECSiNG 2 Set Bike Rear Derailleur Hanger 5.7x2.5cm Aluminum Alloy Mech Derailleur Hanger Hook Adapter Compatible with MT The bicycle rear derailleur is suitable for most types of bicycles, such as mountain bikes and geared bicycles. It can bGénérique  NewRear Derailleur Pulley - 12 Tooth Wheel Pulley - Light Guide Roller - Cycling Accessory for Road Mountain Bike Outdoor a Durability Performance: Optimized for fast chain response, precision forging retains load strength while effectively redSram  NewSRAM Unisex's Spare Rear Derailleur Pulley Kit Apex1/Nx 11 Speed Service & Spare Part, Multicoloured, One Size Revolutionary innovationCreate idea  NewCreate idea Bike Tail Hook Bike Rear Derailleur Hanger Bicycle Derailleur Tail Hook Aluminum Alloy Rear Derailleur Hange Compatibility: This bicycle tail hook is compatible with GT Avalanche(2006-2016), Karakoram(2011-2013), Marathon(2007-20EMSea  NewEMSea Mechanical Derailleur Hanger for Bike Metal Rear Derailleur Hook Black Bicycle Tail Hook 9893-4291 Compatible with Compatibility: This mechanical derailleur hanger is compatible with Specialized Allez/Crux/Dolce, etc.LT Easiyl  NewLT Easiyl Bike Rear Derailleur Hanger Compatible with Marin San Quentin Compatible with Marin: Argenta (for Elite) - 2017, Bayview SE + DISC - 2016, Bayview Trail Disc - 2015-2019, Fairfax forMealoodiousmusea  New2Pcs Rear Derailleur Screws M5x15.8mm Guide Wheel Bolts for Road Package Included:2pcs high rear derailleur screws,easy to use.ECSiNG  NewECSiNG 1pc Derailleur Hanger Aluminum Alloy Rear Derailleur Replacement EP0786-01 Compatible with Canyon 2019-2020 Torqu Replacing OEM numbers : EP0786-01, which is a direct replacement for the old or broken one.Campagnolo  NewCampagnolo Record 12 Speed Rear Derailleur, One Size, Black 12x Record Rear derailleur for use with the campagnolo 12 speed disc or rim brake groupsetsSram  NewSRAM X5 10 Speed Rear Derailleur (Long Cage, Black) For use with 10 speed chainsMicroshift  NewMICROSHIFT Rear Derailleur - ADVENT - 1/2 x 9 Speed - Long Cage - 42T - Steel Cage - Clutch Mechanism (RD-M6195L) Product Type: Sporting GoodsSING F LTD  NewSING F LTD 2pcs Bike Rear Gear Mech Derailleur Hanger Hook Drop Out Adapter with Screw Silver Aluminum Alloy Bike Tail H Bicycle rear tail hanger, made of high quality aluminium alloy, long service life, well protecting your bike from beingSING F LTD  NewSING F LTD 2X MTB Bicycle Rear Gear Mech Derailleur Hook Hanger RE9GA Tailhook Dropout Frame Adapter Compatible with Gia Replacing OEM numbers : RE9GA, which is a direct replacement for the old or broken one, (Not for thru axle models).Générique  NewMountain Bike Rear Derailleur Roller - 12 Teeth Bearing Wheel Pulley | Lightweight Guide Roller Accessory for Road Mount Enhanced Agility: Optimized load retention and lightness alliance ensures fast chain response, with effective weight redIMPALAPRO  NewIMPALAPRO Bike Rear Derailleur Hanger Extender - Shimano Derailleur Hanger - Carrera Gear Hanger - Rear Derailleur Exten 🚴♂️ IMPROVES THE BEHAVIOR AND REACH OF THE CHANGE: Moves the position of the shift back and thereby improves the behavJRC Components  NewJRC Components Ceramic Derailleur Pulley Wheel for SRAM Eagle | Pair of 14&12T Jockey Wheels Ceramic Bearing - Road Bike JRC Components Ceramic Pulley Wheels are compatible with all SRAM Eagle Systems. Narrow-Wide Ceramic 12 + 14tooth JockeyZHXKSH  New3Pcs Bicycle Rear Derailleur Protector, Steel Derailleur Guard, Bike Rear Derailleur Hanger Rear Gear Protector,Chain St 【Effective Protection】 Our Universal Derailleur Guard provides reliable protection for your rear derailleur, preventingCreate idea  NewCreate idea Mech Derailleur Hanger Bicycle Tail Hook Metal Rear Derailleur Hook Compatible with Bianchi Compatible with Compatibility: This mech derailleur hanger is compatible with Bianchi, compatible with Canyon, compatible with CenturionXinhuju  NewDerailleur Roller for Road Bike – 12T Wheel Guide for Bike, Light Guide Roller for Road Mountain Bike Outdoor and Daily Durability Performance: Optimized for fast chain response, precision forging retains load resistance while effectively rSING F LTD  NewSING F LTD MTB Bike Rear Derailleur Link Hanger Extender Frame Tail Hook Extension Black Aluminum Alloy Compatible with Fitment: Compatible with flywheel expansion schemes such as 40T/42T/46T/50T/56T.Create idea  NewCreate idea Bicycle Rear Derailleur Pulley Bike Ceramic Jockey Wheel Rear Derailleur Pulley Aluminum Alloy Bearing Rear 15T Bike ceramic jockey wheel is compatible with most of rear derailleur of 7/8/9/10/11/12 speed.Generic  NewRear Derailleur Pulley – 12T Wheel Guide for Bike, Light Roller Guide for Road Mountain Bike Outdoor and Daily Journeys Weight-Resistance Balance: Precision forging process provides optimal load retention while reducing weight for increasedPastlla  NewPastlla Mountain Bike Rear Derailleur Hanger Derailleur Hanger Extender Bicycle Frame Gear Tail Hook Extender Black Package: 1pcs Rear Derailleur Hanger. Color: Black.LIYJTK  NewCeramic Pulley Aluminium Alloy Rear Derailleur Guide Roller Bike for Smooth Cycling Experience 2pcs (13T) [PREMIUM MATERIAL] Crafted from CNC aluminum alloy for lightweight and durable performanceTopHomer  New2 PCS Cycling Bicycle Bike Rear Mech Derailleur Hanger Hook Alloy Bike Gear Mech Derailleur Frame Hanger Hook, Type009 Material Assurance---The Rear Derailleur Mech Hanger 102% brand new, made of high quality material, small in size, lightSING F LTD  NewSING F LTD 2 x 11T MTB RS Bearing Rear Derailleur Jockey Pulley Wheels for Shimano Red Fits For Most Bike Aluminium Jockey Wheel Rear Derailleur Pulley 11T 8/9/10 Speed.ECSiNG  NewECSiNG Bike Tail Hook 10124 C1355014 Rear Derailleur Hanger Rear Wheel Mechanical Shift Hook Aluminum Alloy Ear Deraille Compatibility: This bicycle tail hook is compatible with Bianchi Cortina(Produced in 2011-2012,2016) Milano(Produced ingeneric  NewRear Tail Hanger,Aluminium Alloy Rear Derailleur Hanger Dropout Lug Pull Hook | Derailleur Hanger Frame Gear Tail ⋏【Long-Term Use】You can use this bicycle derailleur for a long time, made of high-quality alloy material, not easy to deHENWUBEI  New13PCS HENWUBEI Bike Stem Bolts M5x17mm Titanium Alloy Bolts Screws with Washers for Fixing Bicycle Stem Front and Rear D 【Package includes 】:12 bicycle bar bolts, 1 Allen wrench, enough for your daily use.Sram  NewSram Hanger Bolt for Rear Derailleur X0/X9 Type 2, X0/X9 2011 10Spd Sram MTB Rear derailleur X0/X9FITTOO  NewFITTOO Bike Bicycle Rear Derailleur Hanger, Aluminum Alloy Rear Gear Hook, 29 inch Bicycle Rear Dropout Adapter, Compati High Quality:FITTOO rear derailleur hanger is made of high quality aluminum alloy material, and in perfect sizes.MEXWLOP  NewMEXWLOP Bicycle Parts Mech Dropout, for Norco, Optic A7 A9 C7 Range Sight Revolver Rear Derailleur Rd Hanger Gravel Carb Fitment: for Norco, Optic A7 A9 C7 Range Sight Revolver Rear Derailleur Rd Hanger Gravel Carbon Bike Frame,Please refer