STONE Road Bike 3-bolt Crankset, CNC Aluminum Racing Crank Arms, 7075 / 7050 Alloy, 155–175mm DUB 29mm FC-RD003

STONE Road Bike 3-bolt Crankset, CNC Aluminum Racing Crank Arms, 7075 / 7050 Alloy, 155–175mm DUB 29mm FC-RD003

Upgrade your road bike with the STONE FC-RD003 3-bolt Road Crankset, engineered for riders who demand a perfect balance of lightweight performance, strength, stiffness, and long-term reliability.

Designed with a clean modern appearance and precision CNC machining, this crankset is suitable for road bikes, gravel setups, and custom drivetrain builds using for SRAM-style 3-bolt Direct Mount interfaces.

Made from high-strength 7050-T7451 aluminum crank arms and a 7075-T651 aluminum spindle, the FC-RD003 delivers excellent durability while keeping weight low.

Each crankset is produced through in-house CNC machining and tested to meet GB/T 3565.8-2022 racing-level standards, making it a reliable choice for training, racing, and performance road cycling.

Key Features

High-Strength Full Aluminum Construction

The crank arms are made from 7050-T7451 aluminum alloy, selected for its excellent resistance to corrosion, cracking, and long-term fatigue. The spindle uses 7075-T651 aluminum alloy, offering high strength and hardness for stable power transfer.

Precision CNC Machined

Manufactured with in-house CNC processing for consistent quality, accurate dimensions, and a refined finish. The product is designed for riders who care about both performance and detail.

for SRAM-Style 3-bolt Direct Mount Interface

Compatible with 3-bolt Direct Mount chainrings, 3-bolt spiders, and selected 3-bolt power meter spiders. This gives riders more flexibility when building different drivetrain setups.

Standard & WIDE Spindle Options

Available in both standard and WIDE versions:

• Standard spindle: 120mm spindle length, Q-factor 146mm
• WIDE spindle: 125mm spindle length, Q-factor 151mm

The WIDE version is ideal for gravel bikes or frames requiring wider chainline clearance.

Default order we send 120mm spindle version. If you want 125mm spindle, please add the "switch to DUB wide 125mm spindle" version to your order.

Multiple Crank Arm Lengths

Available in a wide range of crank lengths to suit different riding styles, bike fits, and rider preferences:

155 / 160 / 162.5 / 165 / 167.5 / 170 / 172.5 / 175mm

Short crank options are especially suitable for riders seeking improved cadence, better bike fit, or more pedal clearance.

Lightweight Performance

Approximate standard spindle weight:

• 155mm: 506.7g
• 160mm: 514.7g
• 162.5mm: 515.7g
• 165mm: 526.9g
• 167.5mm: 529.3g
• 170mm: 533.3g
• 172.5mm: 538.6g
• 175mm: 545.1g

WIDE version adds approximately 3–5g.

Racing-Level Fatigue Tested

The crankset has passed racing-level fatigue testing according to GB/T 3565.8-2022, including:

• 45° / 1800N / 70,000 cycles
• 30° / 1800N / 100,000 cycles

Built for demanding riding conditions and long-term confidence.

Anodized Surface Treatment

The surface is anodized to improve corrosion resistance and reduce oxidation, helping the crankset maintain its premium appearance over time.

Specifications

Compatibility

The FC-RD003 crankset is designed for road bike crank applications and uses a 28.99mm spindle. It is compatible with SRAM-style 3-bolt Direct Mount chainrings, spiders, and selected power meter spiders.

Recommended Setup

Standard Version

• Spindle length: 120mm
• Q-factor: 146mm
• Suitable for standard road bike frames
• Compatible with BSA68 bottom bracket setups using appropriate spacers
• Similar fitting dimensions to for SRAM Force D1 road cranksets

WIDE Version

• Spindle length: 125mm
• Q-factor: 151mm
• Spindle is 5mm longer than the standard version
• Usually requires 2.5mm spacers on both sides
• Ideal for gravel bikes or frames requiring wider chainline clearance
• Chainline increases by approximately 2.5mm

Default order we send 120mm spindle version. If you want 125mm spindle, please add the "switch to DUB wide 125mm spindle" version to your order.

Why Choose STONE FC-RD003

• Full aluminum CNC crankset for road and gravel use
• Lightweight without sacrificing strength
• 7050-T7451 crank arms for improved durability
• 7075-T651 spindle with high strength and hardness
• for SRAM-style 3-bolt Direct Mount compatibility
• Standard and WIDE spindle options available
• Multiple crank arm lengths from 155mm to 175mm
• Racing-level fatigue tested
• Clean appearance with anodized surface protection

Available Options

Each row below is one available option combination. Choose the complete combination that matches your setup.