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Lewis 34T 30T 8 Bolt 3 Bolt Aluminium Chainring for MTB EMTB & Gravel | 3mm 6mm Offset Narrow Wide
Lewis 34T 30T 8 Bolt 3 Bolt Aluminium Chainring for MTB EMTB & Gravel | 3mm 6mm Offset Narrow Wide
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Lewis ALU Chainring: Trail-Proven Strength with eMTB Compatibility
When every watt counts and durability is non-negotiable, the Lewis ALU Chainring delivers. Precision CNC’d from 7075-T6 aluminum with a hollow-core structure, this chainring punches far above its weight class — built for high-torque eMTB abuse and analog pedal power alike.
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Material: 7075-T6 CNC Aluminum
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Coating: Lewis Proprietary High-Abrasion-Resistant Finish
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Mount Interface:
- SRAM 3-Bolt – Standard on most SRAM Eagle DUB cranks
- SRAM 8-Bolt – Used on SRAM T-Type Transmission cranks, Quarq power meters, and select eMTB motors -
Sizes Available:
- 3-Bolt 30T – 3mm Offset
- 3-Bolt 34T – 3mm Offset
- 8-Bolt 34T – 3mm Offset
- 8-Bolt 34T – 6mm Offset
eMTB-Ready:
The Lewis ALU Chainring is fully compatible with several SRAM-based eMTB systems — including:
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Brose/Specialized SL 1.1 & 2.2 motors with SRAM 3-bolt cranks
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TQ HPR50 systems using SRAM 8-bolt mounting
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Bafang M500/M600 with SRAM crank conversion
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Bosch CX (2023+) and Performance Line SX via third-party SRAM 3/8-bolt adapters
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Rocky Mountain Dyname systems with SRAM interfaces
Offset Explained:
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3mm Offset → Optimized for Boost (148mm) chainlines — ideal for most modern eMTB frames
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6mm Offset → Suited for non-Boost or fine-tuning chainline on custom builds, including narrow Q-factor setups
Mounting 101:
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If you're riding a full SRAM analog drivetrain (GX/NX/XX1, etc.), grab the 3-bolt.
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If you're running a Transmission, Quarq, or a new-gen eMTB with an 8-bolt spider, you're covered too.
Bottom line: Whether it’s watts from your legs or from a 250W motor, the Lewis ALU Chainring holds the line. Lightweight. Ultra-durable. eMTB-approved.