ARC MT-051F/R 28H Straight-Pull Boost Center Lock MTB Hub Set

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ARC MT-051F/R 28H Straight-Pull Boost Center Lock MTB Hub Set

MT-051F/R Boost

Specification

Freehub system

Spoke holes

Bearing

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Product Details

Built for Stronger MTB Performance

Designed for modern MTB Center Lock disc brake wheel builds, MT-051F/R combines a lightweight AL6061-T6 aluminum hub shell with a dedicated Straight-Pull spoke configuration and Boost axle standard. With a 15×110mm front and 12×148mm rear configuration, the hubset is engineered to provide an optimized balance of wheel stiffness, structural strength, and responsive drivetrain performance for demanding trail and all-mountain riding.

Full-Surface Ratchet Engagement

36T / 54T Ratchet System for Consistent Power Transfer

Compared with conventional pawl systems, the larger contact area distributes drivetrain loads more evenly, reducing localized stress while improving durability, engagement stability, and pedaling efficiency under demanding riding conditions.

Patented One-Piece Ratchet Architecture

Integrated Design for Higher Strength & Reduced Failure Risk

ARC's patented one-piece ratchet design integrates the engagement structure into a single precision-engineered component. The system increases structural rigidity, reduces overall weight, and improves machining accuracy. The simplified construction also enhances long-term reliability while making assembly and maintenance more efficient.

Technical Specification

#	Type	Details
1	Hub Shell Material	AL6061-T6 aluminum alloy
2	Axle Material	AL7075 aluminum alloy
3	Freehub Body Material	AL7075 aluminum alloy
4	End Cap Material	AL7075 aluminum alloy
5	Disc Brake Interface	Mountain bike Center Lock disc brake straight-pull hub
6	Hole Count	F-28H/R-28H
7	Hole Diameter	14G
8	Surface Color	Matte black anodized finish with sandblasted texture
9	Freehub Body Color	Black anodized
10	Bearing Configuration	S&S Steel Ball Bearings / S&S Ceramic Bearings
11	Hub Structure	Ratchet-36T/Ratchet-54T
12	Freehub Body Standard	Shimano HG / Shimano Microspline (MS) / Sram XD
13	O.L.D.	F-110MM / R-12*148MM
14	Weight	401.2g±5g

Precision Materials.

Flexible Configuration.

Engineered with high-strength aerospace-grade aluminum and a dedicated Boost Straight-Pull structure to meet the demands of modern MTB riding.

✓ High-Strength Aerospace-Grade 7075 Aluminum Alloy Axle & Freehub Body
The axle, freehub body, and end caps are manufactured from aerospace-grade AL7075 aluminum alloy, enhancing structural stiffness and durability while maintaining a lightweight construction.

✓ Boost Straight-Pull Configuration
The Straight-Pull design provides a direct spoke interface and optimized load path, helping improve spoke alignment and wheel stiffness while creating an efficient structure for high-performance MTB wheel builds.

✓ 28H Front & Rear Configuration
The 28-hole front and rear configuration provides a balanced spoke layout for reliable wheel stiffness, load distribution, and durability across demanding MTB riding conditions.

✓ Lightweight 395g Hubset Construction
A carefully optimized hub structure keeps the complete hubset weight to just 395g, reducing overall wheel weight while maintaining the strength and reliability required for modern trail and all-mountain riding.

✓ Multiple Freehub Standards Available
HG, Microspline, and SRAM XD freehub standards are available to support different MTB drivetrain configurations, providing flexible compatibility for a wide range of wheelset applications.

✓ Boost Center Lock Compatibility
Designed for 15×110mm front and 12×148mm rear Boost thru-axle standards, with a Center Lock disc brake interface, providing compatibility with modern Boost MTB wheel systems.