The Best 40T 104Bcd Chainring of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best 40T 104Bcd Chainring of 2025. Check our ranking below.
2,928 Reviews Scanned
Rank No. #1
DECKAS Round Chainring 104BCD 40T 42T 44T 46T 48T 50T 52T Narrow Wide Chainring for 7 8 9 10 11 12 Speed Chains (Round Black, 40T)
- Material: High quality 7075 aluminum alloy,Anodized surface.
- The new narrow-wide teeth design increases chain retention, wear life, and reduces friction and noise, larger wide tooth design provides maximum ring durability and drop performance.
- Suitable for most of Shimano and Sram cranksets, Please confirm that your crank BCD specification is correct before purchase.
- Gift: You may find it a gift option to your husband, wife, boyfriend, girlfriend, or gift for your kids' bike for back to school gift, Christmas gift, Valentine's day gift, Mother's day or Father's day gift, thanksGiving gift or New year gifts, for mountain bike, fat bike or e-bike.
- Package include: 1 x 104BCD narrow wide chainring.
Rank No. #2
104mm BCD Narrow Wide Tooth Round Bicycle Chainring 40T 42T 44T 46T 48T 50T 52T CNC Machined Alloy Fits 8 to 12 Speed Chains (40T Round Chainring)
- Material: CNC Machined Aluminum Alloy. Light Weight with Great Strength and High Performance.
- Bolt Center Diameter: 104mm. Plate Thickness: 4mm.
- Product net weight: 78grams(40T); 89grams(42T); 99grams(44T); 111grams(46T); 124grams(48T); 137grams(50T); 151grams(52T).
- Narrow Wide Tooth Design Ensures Chain Retention. CNC Machined Aluminum Alloy.
Rank No. #3
YBEKI Pro-Grade 104BCD Chainring (30-52T) CNC 7075-T6 Aluminum Narrow-Wide MTB/Road Round Oval Bike Chainwheel | Shimano/SRAM 8-11 Speed Compatible | 573MPa Strength (Black Round, 34T)
- 1.🔧【Aerospace-Engineered 7075-T6 Alloy】7075-T6 Aluminum Alloy - 572MPa tensile strength (30% stronger than 6061), ✓ 5-Axs CNC Machined - ±0.01mm tooth tolerance (ISO 13041 certified), ✓ Military-Grade Hard Anodization - HV800 surface hardness (3x wear resistance), ✓ Compatibility: Compatible with 104BCD Single Bike Chainring Shimano/SRAM 8-11 Speed MTB/Road Bikes
- 2. ⚡【DynamicChain 3.0 Anti-Drop System】Alternating Narrow-Wide Tooth Profile (7.3mm wide / 6.8mm narrow teeth) perfectly matches 8-11 speed chain pitches.✓ Dynamic Chamfer Technology enables 45% faster chain engagement, tested to reduce chain drops by 92% on rough terrain.✓ Extended Tooth Tips enhance stability, ideal for high-impact MTB rides and aggressive road cycling
- 3. 🚀【3D Ultra-Lightweight Architecture】3D Hollow Structure cuts weight by 63% compared to steel, achieving a featherlight profile without compromising strength.▸ Asymmetric Reinforcement Ribs deliver 155Nm/deg lateral stiffness, ensuring power transfer efficiency up to 98.7%.▸ 1kg Total Weight Reduction for your bike, boosting climbing performance and overall agility
- 4. 🌧️【Pro-Level Performance Features】Mirror-Polished Teeth (0.09μ ultra-low friction coefficient) minimize energy loss during pedaling.✓ Self-Cleaning Grooves reduce mud accumulation by 70%, maintaining peak performance in wet or dirty conditions.✓ Dual Anodized Finishes (Matte Black/Ceramic Coated, Electric Blue&Racing Red/UV-Resistant Nano-Dye) for style and long-lasting colorfastness
- 5.💎【Lifetime Durability Guarantee】12-Month "Zero Rust" Promise – Free replacement if oxidation occurs, 24/7 Expert Support – US-based mechanics answer questions within 24 hours, Fast Replacement: Defective parts replaced within 48 hours
Rank No. #4
DJC Bike Chainring 104mm BCD Round/Oval MTB 104BCD 7/8/9/10/11/12 Speed Narrow Wide Tooth Aluminum 7075 Super Lightweight 30T 32T 34T 36T 38T 40 42 DH XC Trail Fat Bike ebike (1# Round Black, 40T)
- 104mm BCD support: Bolt Circle Diameter(BCD) is 104mm. Wrong BCD will not works. This 104BCD chainring support for Shimano M391 M430 M590 M610 M615 M610 M670 M675 M770 M780 M785 M980 M640 M820, and Prowheel, IXF 104BCD crankset.
- Aluminum 7075 and CNC Process: Aluminum 7075 ensure it is lightweight but stiffness. Full CNC makes the precision size and nice surface looking. 30-38T is 40-70g only(1.4-2.5oz).
- 7-12 Speed System Support: Your bike front chainring will be 1x after install this chainring. And rear flywheel cassette may 7/8/9/10/11/12s. 1x system makes your bike more lightweight compare to 3x and 2x.
- Upgraded Narrow Wide Tooth: Current tooth shape is 2nd generation narrow wide tooth. With more curve and easy to clean and self-clean from soil. Makes the chainring lifespan more longer.
- 1 Year Coverage: We offer 1 year Coverage. The package content is chainring and 4 pairs steel bolts.
Rank No. #5
DJC Bike Chainring 104BCD Round 30t 32t 34t 36t 38t 40t 42t 44t 46t 48t 50t 52t Tooth Narrow Wide 7/8/9/10/11/12 Speed Ultralight MTB Mountain Bike 104 BCD Chainwheel,01# Round Black,36T
- 104BCD for MTB: 104BCD chainring with 4 arms, for MTB 1x speed, Wrong BCD will not work. Fit for Shimano crank M391 M430 M590 M610 M615 M610 M670 M675 M770 M780 M785 M980 M640 M820, and Prowheel, IXF 104BCD cranksets.
- Speed support:1x 7/8/9/10/11/12 speed system support. Color: Black Red Oilslick(electroplating color) Blue Gold Purple. Thickness: 4mm.
- Alu 7075& CNC Process: Aluminum 7075 and full CNC process, offer you stiffness and lightweight bike chainring. Weight: 30T-38T, 38-67g(1.3-2.4oz). 40T-44T, 90-130g(3.2-4.6oz). 46T-52T, 150-190g(5.3-6.7oz).
- Narrow wide tooth: upgraded tooth design help chain anti-drop. Ultralight design and 1x speed chainring helps to save 1kg for your bike compare to double chain ring.
- 1 Year Coverage: We offer 1 year Coverage. The package content is 1pcs chainring.
Rank No. #6
MSRECK Round Oval Chainring 104 BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chain Ring for Road Bikes, Mountain Bikes, BMX MTB Bike (Black Round, 48T)
- Single speed 104mm BCD 32/34/36/38/40/42/44/46/48/50/52T, Round/Oval, Black/Red/Blue, Thickness 4mm (1.9mm Narrow, 3.7mm Wide), very easy to install.
- The new narrow-wide teeth design increases chain retention, wear life, and reduces friction and noise.
- Only suit Single speed chainring, doesn't fit double/triple speeds chainrings,7/8/9/10/11/12/speed chains (for Shimano/SRAM/FSA crank).
- 7075 T6 aluminium alloy CNC engraving and milling, anodic oxidation, full of the laser marking，Super durable and light weight.
- Package include: 1 x 104BCD narrow wide chainring.
Rank No. #7
JGbike Crank Arm Set Mountain Bike Crankset Arm Set 170mm 104 BCD with 68 73 Bottom Bracket Kit and Chainring Bolts for MTB BMX Road Bicyle,Compatible with Shimano,SRAM,FSA, Gaint
- 🚴♂️- Best Deal,This is the most compatible crank arm set we offer for our best selling 104 bcd single chainring.In addition,it comes with 1pc 104bcd chainring in specific oval or round size; you are free to choose the 68/73BB version or Square Taper;
- 🌟 - Identical Offer, The Crank arm set made with Forged AL-6061-T6 aluminum alloy,Strong high strength,crank Arm length 170mm,Bottom Bracket Width: 68-73mm,5pc chainring bolts,each product has been tested the compatibility with our chainring;
- 🎁 - Gift Options, it's in Our's brand package, a great upgrade or replacement for your old bike bottle cage holder. You may find it a gift option to your husband, wife, boyfriend, girlfriend, or gift for your kids' bike for back to school gift, Christmas gift, Valentine's day gift, Mother's day or Father's day gift, thanksGiving gift or New year gifts;
- 🏫 - Support PROs, we are sponser for several PRO teams in UT and CA, we support Business, just place bulk purchase and replace for your other family bikes, recommend to your community. We offer business price for bike bicycle shops, love to be your business partners and trusted vendors;
- 🤟 - Match DIY's Value, find brakes, cassette, rotors or bleeding kits for your bikes, find pedals, single chainring in one place, even groupset to build your bike. We are best value on bicycle parts supplier to improve your performance and experience;
Rank No. #9
GANOPPER 36 38 40 42 Tooth Bike Oval Chainring Guard 104BCD Mountain Bike Chain Bashguard Sprocket Protector for MTB BMX Road Bike Chain Bash Guard
- Material: Full CNC Hollow Design,AL 6061/T6 heating Treatment ,stable and durable .Lightweight aluminum Bike Chainring Protector for All Mountain and aggressive XC
- Size: 104BCD ,Shape : Crown , Thickness: 4mm,Durable. Diameter:180mm ,Weight:Approx 57.2g(0.12 lb)
- Fit For 104 BCD 36T, 38T,40T ,42T Chain ring Guard ,bolts included(4pcs 2mm Chainring Bolts spacer included, you can add it if necessary).
- Use for Single Speed/Double/Triple MTB Crankset Bash Guard ,Considering interference,if your crankset is single speed design ,please add spacer between chainring and bashguard before use;16.8mm super long bolts can be used for 104mm 2X 3X crank set
- Parcel: bicycle chain bashguard *1 pcs ,M8*16.8mm crank bolts *4sets,Bike Chainring Bolt Spacer *4 pcs(2mm thickness)
Rank No. #10
Cyclon Single Speed Square Taper Crankset, 170mm Mountain Bike Crankset with 104BCD 32T/34T/36T/38T/40T/42T Narrow Wide Tooth Round Black Chainring, Replacement for Bicycle Crank Arm Set MTB Crankset
- 【High Grade Crankset】The surface of mtb crankset is frosted and anodized, and at the same time, the density of the aluminum alloy in the threaded part of the crank arm is increased, which effectively protects the crank and prolongs the use time.
- 【Crankset Size】High-quality aluminum alloy square taper crankset, crank arm length is 170mm, suitable for 104BCD single speed chainring and 9/16" pedals.
- 【BCD104 Chainring】The alternate design of narrow and wide teeth can effectively prevent the chain from falling off. 32T/34T/36T/38T/40T/42T round black chainring are available in a variety of options to meet various needs.
- 【Compatible】Suitable for most of 8/9/10/11 single speed mountain bike, road bike, not for multi-speed bikes.
- 【Package Include】:1PC Mountain bike crankset , 1PC single speed chainring, 4PCS Chainring bolts, 1PC Three-pronged wrench and a exquisite box.
Last update on 2024-10-20 / Affiliate links / Images from Amazon Product Advertising API
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