High Quality Bike Spares Parts Aluminum Alloy Forging Mountain Bicycle Crank Chainwheel

Product Description

                    High Quality Spares Parts  Aluminum Alloy Forging Mountain Bicycle Crank Chainwheel 

Product Description

 

Crank Construction: 2 pieces solid crank
Cassette compatability:8 speed; 9 speed
Chainring numbers:42-32-22T
Bolt Circle Diameter:104/64mm
Color:Black
Crank Arm material:Aluminum Alloy
Crank Arm Length:170mm
Bottom bracket: fits standard 68mm and 73mm shell.

Tolerance	± 0.02mm
Surface Treatment	Chrome Plating, Zinc Plating, Nickel plating, Electrophoresis, Anodization, Polishing, Powder coating, Sandblasting, Passivation, Spray painting, Etc.
QualityAssurance	ISO9001:2015 Certified, SGS Certification
QualityGuarantee	Two years
Inspection	1.Foundry in-house: 100% inspection on critical dimension; 100% on appearance. 2.Third Party inspection available upon requirement
Mainly Testing Facility	Three-dimensional measuring instrument, Salt spray test box, Dynamic balance detector, Pneumatic detection
Payment term	T/T, L/C
Lead time	Usually 20 days after order confirmed
Features & Advantage	1.High machining accuracy, the flatness within 0.1mm. 2.High strength and not easy to deform, has good electrical and thermal conductivity. 3.High finish appearance, smooth surface roughness is Ra1.6 after machining.

     Color:Seven colors
     Weight: 276g [Gear ratio] 11-28T (11-13-15-17-19-21-23-25-28T)
    *Road cassette type 9-speed variable speed bicycle flywheel, compatible with the variable speed
      systems of major mountain brands.
    *Made of high-strength steel, using quenching and tempering hardening technology. Therefore, it has
      high strength, durability and strong wear resistance. Strong oxidation resistance, not easy to rust, and
      long service life. Due to the unique design of the car sprocket, the shift function can be well controlled.
    *Using hollow design, the weight is reduced. The surface is made of vacuum colorful electroplating
      process. No fading phenomenonon the electroplated surface. The surface is more beautiful, giving
      a luxurious feeling.

Our Advantages

 

Sample

1) sample fee:The sample fee just the cost price , the sample fee is refundable if you place a big order later
2) freight: we usually send samples through Express such as UPS, DHL, Fedex, etc. or on your own requirement
3) sample time: 7-10 days
Service

1)Your inquiry will be replied within 6 hours.
2)Well-traind&experienced sales can reply your inquiries in English.
3)During working time,E-mail will be replied to you within 1 hours.
4)OEM&ODM projects are highly welcomed.
5)The order will be produced exactly according to order details and proofed samples,our QC will submit inspection report before shipment.
6)Your business relationship with us will be confidential to any third party.
7)Good after-sale service.

 Here are some of our other best-selling products for you to choose from

* NARROW WIDE TOOTH DESIGN:The new narrow-wide teeth design increases chain retention, ensures
   ultimate chain retention,increases wear life,and reduces friction and noise.
* SINGLE CHAINRING:Through the modification single speed chainrings, reduced the transmission system
   greatly ,completely abandoned the complex variable speed system,reduce the bike weight at least 1kg,
   looks more compact and simple, and also greatly improve your speed.
* SPROCKET RING: The narrow wide tooth design increasing the contact area with the chain greatly, so
   that each of the teeth can be fully inserted into the chain, increase the grasp force, make you no longer
   worried about the chain dorpped, easy to pass through bumpy road.

Packaging & Shipping

 

 

FAQ

1. What is a Chainwheel Crank?
A Chainwheel Crank, commonly called a Crankset, is a core component of a bicycle's drivetrain. It consists of one or more chainrings (the front gears) attached to crank arms, which connect to the bottom bracket and transfer the rider's pedaling force to the chain and rear wheel.

2. What types of cranksets do you manufacture?
We produce a comprehensive range for various bicycles:

Road Bike Cranksets: 1x, 2x chainrings (e.g., 50/34T, 52/36T), lightweight.

Mountain Bike (MTB) Cranksets: 1x (narrow-wide), 2x, and 3x systems, built for durability.

City/Hybrid Bike Cranksets: Often 2x or 3x for versatile gearing.

E-Bike Cranksets: Reinforced designs to handle motor torque.

Kids'/BMX Cranksets: Simple, robust 1-piece or 3-piece designs.

Custom & OEM Cranksets: To your exact specifications.

3. What materials are used?
We use high-performance materials to balance weight, strength, and cost:

Crank Arms: 6061 or 7075 aluminum alloy (forged or CNC machined), carbon fiber (high-end).

Chainrings: 7075 aluminum (CNC machined), steel, or carbon fiber. 1x chainrings often feature narrow-wide tooth profiles for superior chain retention.

Spider/Bolt Circle: Integrated or separate, made from aluminum or steel.

Hardware: Steel or titanium bolts.

4. How can I request a quotation or discuss a custom project?
Please provide the following information for the best service:

Bicycle type (Road, MTB, E-Bike, etc.).

Desired specs (material, number of chainrings, tooth counts, BCD, bottom bracket standard).

Intended use and target market.

Estimated annual quantity.

Any special requirements (weight target, color, branding).

5. How do I choose the correct chainring size(s) and BCD?
Chainring Size (Tooth Count): Determines gear ratio. Common road doubles: 50/34T (compact), 52/36T. MTB: 28T-38T for 1x, or combinations like 24/34/42T for 3x.

Bolt Circle Diameter (BCD): The diameter of the bolt pattern attaching the chainring to the spider. Must match between chainring and crankset (e.g., 110mm BCD for many road cranks).
Provide your intended use and desired gearing for our recommendation.

6. What is your crankset's weight?
Weight varies significantly by material, size, and number of chainrings:

Road 2x (Aluminum): ~600g - 800g.

MTB 1x (Aluminum): ~550g - 750g.

High-End Carbon Models: Can be under 500g.
Exact weights are provided in the product specifications.

7. What are the payment and shipping terms?
Payment: T/T (30% deposit, 70% before shipment) or L/C at sight.

Shipping: Mainly by sea (FOB/CIF). We provide professional, damage-proof packaging suitable for long-distance transport.

8. Can you produce custom chainring designs (logo, tooth profile)?
Absolutely. As an OEM expert, we specialize in:

Custom CNC Machining: Unique shapes, logos, and weight-saving cutouts.

Proprietary Tooth Profiles: For optimized shifting and chain retention.

Anodizing & Color Matching: Any color, including laser-etched graphics.

Direct Mount Chainrings: For specific spider designs.

9. What is your MOQ (Minimum Order Quantity)?
Standard Models: MOQ 200 sets.

Custom Design/OEM: MOQ 500 sets (negotiable based on design complexity).

Chainrings Only: MOQ 1,000 pieces.

Samples: Available for testing and quality approval.

10. What quality control measures are in place?
We ensure every crankset meets high standards:

Material Certification: For aluminum and steel alloys.

Dimensional Accuracy: CMM checks for interface tolerances (BB spindle, pedal threads).

Static & Dynamic Load Testing: Fatigue testing to simulate years of pedaling stress.

Hardness & Surface Treatment Inspection.

100% Final Visual and Function Check.

11. What is the production lead time?
Samples: 10-15 working days.

Standard Products: 20-30 working days.

Custom/OEM Orders: 30-45 working days after final design and sample approval.

12. Do you offer private labeling and packaging?
Yes. Full OEM services include:

Laser Etching or Stamping of your brand/logo.

Custom Retail Packaging (blister packs, boxes).

Bulk Packaging for bicycle manufacturers.

   We assure you of our best services at all times! 

   If you are interested in product,please click " SEND " for more details.