Lewis
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
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.
User Manual
User Manual
Warranty Information
Warranty Information
Lewis stands by their products and offers a 3-Year Warranty.
What Is Covered By Warranty
Mechanical failures under normal intended use, caused by errors in manufacturing or by early wear and tear of individual components. Mechanical items include lever body, lever, fixings, bolts, caliper, pistons and hoses.
What is NOT Covered By Warranty
- Any failure or damage caused by unintended use of our products, such as an accident, crash or mistreatment of the product.
- Normal servicing/wear and tear parts, for example, bearings and oil seals.
- Incorrect installation, leading to premature wear, damage or corrosion.
How to Claim
Make sure you have the original purchase invoice with date, customer name and order number. Only original owners are eligible for warranty.
Contact our customer service team tipartssg@gmail.com with:
1. Order number
2. Detailed explanation of the problem.
3. Pictures and video to support the claim.
We will contact you within 48 hours.
If not accepted, we will give a clear reason why. We will give you a solution or an alternative method.
If accepted, according to the issue or fault, we will determine whether we send you a replacement part/s or a complete new brake system.
Returns & Refund Information
Returns & Refund Information
We want you to be fully satisfied with your purchase. However, please note that returns and refunds are only accepted for genuine product quality issues, such as cracks or structural breaks.
Issues such as creaking or noise are generally the result of improper installation and are not considered product defects.
Not Eligible for Return or Refund
Returns will not be accepted under the following conditions:
- Improper installation or use
- Normal wear, surface marks, or cosmetic blemishes
- Damage caused by misuse, over-torque, or accidents
- Any modification or alteration of the product
- Products showing signs of use (including clamp or installation marks)
Returns Due to Wrong Model Ordered
If the incorrect model was ordered by you:
- You are responsible for all return shipping costs.
- Once we've received your return, we will refund you the purchase amount less:
- a) Payment gateway fee of 7% (this is what our credit card company charges us)
- b) Shipping costs, even if you received "free shipping", as we subsidise shipping at our own expense.
Additional Notes
- Returned items must be in unused, original condition and complete with all packaging.
- Products showing any signs of installation or use will not be eligible for return.
- If reshipping is required, the reshipping fee will be borne by the buyer.
