STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset
STONE 8-Bolt Direct Mount Chainring with Removable Bash Guard t-type axs flattop for sram 12s chain 30 32 34 36 38 40T 3mm offset

STONE 8-Bolt Direct Mount Chainring, 3mm Offset, for SRAM XX Eagle, 30–40T

For SRAM T-Type MTB 12s and AXS Flattop 12s chains
3mm offset, 8-bolt direct mount for SRAM Eagle cranksets
Removable 5mm bash guard; 30T–40T options

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STONE SR8-3OF-HP 8-Bolt Direct Mount Chainring with Removable Bash Guard (3mm Offset, 30–40T) for SRAM Eagle Cranksets

Upgrade your drivetrain with the STONE SR8-3OF-HP, a high-strength 8-bolt direct mount chainring built for SRAM mountain bike cranksets. Machined from premium AL7075-T651 aluminum alloy, it delivers the strength, hardness, and long-lasting durability needed for demanding MTB riding.

The chainring features a 3mm offset optimized for SRAM 8-bolt mountain crank interfaces. It is designed for SRAM T-Type chains and also works with SRAM AXS 12-speed road chains. CNC-machined construction and an anodized finish give the SR8-3OF-HP precise chain engagement, improved wear resistance, and a clean, high-end appearance.

A standout feature of this model is the removable split bash guard. Install it for extra protection on technical terrain, or remove it for a lighter, cleaner setup. The guard has an effective thickness of 5mm, shielding the chainring teeth from rock strikes and impacts.

Key Features

  • Premium AL7075-T651 Aluminum
    • High-strength 7075 aluminum alloy with T651 heat treatment
    • Overall hardness: approximately 150HB
    • Strong, rigid, and durable for aggressive MTB use
  • CNC Machined Construction
    • Precision CNC machining for accurate fitment and low runout
    • Maintains stable chain engagement and smooth pedaling performance
  • Anodized Surface Treatment
    • Enhanced oxidation resistance
    • Helps prevent long-term discoloration and corrosion of the aluminum surface
  • 3mm Offset Design
    • Built with a 3mm offset
    • Suitable for SRAM-style 8-bolt mountain direct mount cranksets
  • Removable Bash Guard
    • Split detachable guard design
    • Effective guard thickness: 5mm
    • Can be installed or removed based on riding needs
    • Different chainring tooth counts use corresponding bash guard sizes
  • T-Type Chain Compatibility
    • Designed for SRAM mountain T-Type chains
    • Also compatible with SRAM road AXS 12-speed chains
    • Other chain types are not recommended
  • Direct Mount 8-Bolt Interface
    • Fits SRAM original mountain 8-bolt direct mount cranksets
    • Easy installation with original or compatible bolts

Specifications

The table below summarizes the core specifications of the SR8-3OF-HP chainring.

Item Details
Brand STONE
Model SR8-3OF-HP
Mount Type SRAM 8-Bolt Direct Mount
Material Imported AL7075-T651 Aluminum
Hardness Approx. 150HB
Chainring Thickness 6.7mm without bash guard
Thickness with Bash Guard 12mm
Bash Guard Effective Thickness 5mm
Offset 3mm
Process CNC Machined
Surface Finish Anodized
Colors Anodized Black / Silver
Tooth Options 30T / 32T / 34T / 36T / 38T / 40T

Size & Weight Options

Weights and dimensions are listed separately for the chainring on its own and with the bash guard installed.

Chainring Without Bash Guard

Teeth Max Outer Diameter Weight Part Number Color
30T 130mm 62.1g SR8-3OF-HP-30TY Black / Silver
32T 138mm 67.4g SR8-3OF-HP-32TY Black / Silver
34T 146mm 75.4g SR8-3OF-HP-34TY Black / Silver
36T 154mm 81.7g SR8-3OF-HP-36TY Black / Silver
38T 162mm 89.4g SR8-3OF-HP-38TY Black / Silver
40T 170mm 94g SR8-3OF-HP-40TY Black / Silver

Chainring with Bash Guard

Teeth Max Outer Diameter Weight Part Number Color
30T 130mm 106.6g SR8-3OF-HP-30TY Black / Silver
32T 138mm 116.3g SR8-3OF-HP-32TY Black / Silver
34T 146mm 122.1g SR8-3OF-HP-34TY Black / Silver
36T 154mm 132.8g SR8-3OF-HP-36TY Black / Silver

Weight is for reference only. Product weight may vary due to optimization or production updates without prior notice.

Compatibility

The SR8-3OF-HP fits SRAM 8-bolt direct mount mountain cranksets and is designed for SRAM T-Type drivetrains. The full compatibility details are listed below.

Category Compatible Items
Cranksets SRAM XX Eagle SL, SRAM XX Eagle, SRAM XO Eagle, SRAM GX Eagle
Cranksets (bash guard version) STONE FC-MT001 crankset
Chains SRAM Mountain T-Type chain; SRAM Road AXS 12-speed chain

Other chain types are not supported.

Installation Notes

  • Please confirm your crank interface before purchase.
  • Designed for SRAM 8-bolt direct mount mountain cranksets.
  • Chainring offset: 3mm.
  • Use original bolts or compatible replacement bolts.
  • Recommended tools and torque:
    • T20 Torx wrench for bash guard bolts: 4Nm
    • T30 Torx wrench for chainring mounting bolts: 11Nm
  • The bash guard is removable and can be installed according to riding needs.
  • Different tooth counts require matching bash guard sizes.