Chainrings

Helix R e*spec Chainrings merge cutting-edge design and performance. Designed as an upgrade for the most popular e-bike motor systems, this 1-piece direct mount chainring is forged and machined from 7075 AL. Boasting lightweight, durability, impressive stiffness, and a standout technical aesthetic, they're available for Bosch CX Gen4/Gen5, Bosch SX, TQ HPR50, Fazua Ride 60, Shimano EP8, Avinox, as well as Specialized SL1.1 and 2.1/2.2 motors. With a long-wearing tooth profile and refined aesthetic, the integrated look, when paired with Helix Race Alloy e*spec cranks, is the ultimate upgrade to your e-bike. The new M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano®, Sram®, and TRP® 11/12s drivetrain, including SRAM® T-Type®. It's available in a variety of Specialized® colors for coordination with e*thirteen cranks, cassettes, stems, tubeless valves, and more. Bosch rings are offered in two offset options: - 13mm for 53mm chainline on CX Gen4/SX and 55mm chainline on CX Gen5 bikes - 15mm offset for 55mm chainline on CX Gen4/SX, and 57mm chainline on CX Gen5

The Helix Race 107 BCD Chainring is a high-value quality upgrade for Gravel and Road Cyclists using 4-bolt 107 BCD cranks such as SRAM® XPLR or Power Meter Cranks like Quarq Force or Rival. Take full advantage of e*thirteen’s widest range cassettes by dropping 2 teeth or more in chainring size with our smaller 38, 40, and 42T sizes. A combo that supports steeper climbs and faster descents. Helix Race 107 BCD rings are forged from long-wearing 7075 alloy and CNC optimized for stiffness, lightweight, and chain-retaining performance. Black & grey color options to coordinate with e*thirteen 9-45T and 9-50T cassettes. Like all e*thirteen chainrings, they feature cross-compatible tooth profiles, switching seamlessly between SRAM® or Shimano® 11 and 12-speed drivetrains for absolute build freedom. Chainline is determined by SRAM® crank assembly, 45mm for normal width cranks, 47.5mm for wide cranks. SRAM® is a Registered Trademark of SRAM LLC.

Proven cross-compatibility applied to an ultra-lightweight, durable AL-7075-T6 chainring. Highly CNC'd technical finish. Available to match Helix cassette colors, SRAM™ compatible 3-bolt design.

A technology first. Combine with the chain, derailleur/shifter of choice without a change in chain retention quality. Build a dream rig with more freedom and spec creatively. Available in bold colors to match the popular e*thirteen Helix R Cassettes, Plus 35 Stems, and Quick Fill Plasma Valves.

- Save weight, keep your drivetrain options open, and use the chain you want
- 3-Bolt Direct Mount design for use with SRAM™ 3-bolt direct mount compatible cranks
- Cut from billet AL-7075 for the highest strength and wear resistance
- SRAM™ and Shimano™ 11 and 12 Speed Chain Compatible
- Extensive CNC machining for lightweight and looks that kill
- Available in 5 bold Ano colors and 4 sizes 28/30/32/34t
- Match and personalize the way you want?
- E*thirteen QuickConnect Direct Mount rings include 1mm spacers which allows them to be run on legacy cranks (TRS/LG1/XCX) as well as Helix and Helix R cranks
- 3-bolt direct mount chainrings fit SRAM and other similar interface cranks
- Tooth profile

Helix Race 8-Bolt Chainrings are an upgrade to any 8-bolt drivetrain. Exquisitely machined from 7075-AL, they're stiff and durable, and provide a significant weight reduction over competitors. A unique four-bolt locking interface reduces assembly weight while improving longevity and ease of assembly and maintenance. Featuring e*thirteen's M4 narrow-wide tooth profile, they deliver excellent chain retention, long wear-life, and cross-compatibility with Shimano and Sram drivetrains, including T-type. - M4 narrow-wide profile delivers enhanced chain retention and cross compatibility with Shimano, Sram, and TRP® 11/12s drivetrains, incl. T-Type - Unique 4-bolt locking interface reduces weight and simplifies installation and maintenance - Forged-CNC 7075 AL for ultralight weight, with high strength, stiffness, and wear-life - Compatible with 8-bolt cranks and e*thirteen Helix Race Carbon Cranks 30/32/34T sizes complement e*thirteen wide range cassettes

Helix Race GR chainrings are gravity-optimized direct mount chainrings specifically intended to be used with Helix Race GR cranks. They are designed to withstand the punishment of downhill, bikepark, and freeride disciplines. They’re crafted of AL 7075-T6, forged, and then CNC’ed for optimized weight, ample stiffness, and great looks. Paired with 83mm spindle Helix Race GR Cranks, -7mm offset GR chainrings produce a 56.5mm chainline suitable for most long-travel bikes. Our Quick Connect Direct Mount spline provides proven security and creak-free mounting. Featuring e*thirteen’s M4 narrow-wide tooth profile, GR Rings deliver improved chain retention, reduced noise and system wear, and seamless compatibility with both Shimano® and SRAM® drivetrains (including T-type®). Available in 34T and 36T sizes and Black or Sterling Silver color options. *83mm crank requires the Helix GR Chainring. 73mm crank requires a standard Helix chainring.

A lightweight and affordable e-bike spider compatible 104BCD chainring, with excellent chain retention and wear-life. The Helix e*spec 104BCD chainring features a lightweight, stiff, and durable 7075-AL construction and e*thirteen's latest M4 narrow-wide tooth profile for excellent chain retention and wear life. Helix performance and an affordable price make this the perfect match for any 104BCD spider or the e*thirteen Turbocharger spider-bashguard. - M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano, Sram, and TRP 11/12s drivetrains, including T-Type - Forged-CNC 7075 AL for ultralight weight, with high strength, stiffness, and wear-life - 32/34T sizes complement e*thirteen wide range cassettes - Compatible with 104BCD spider-based e-bike chainrings and e*thirteen Turbocharger Spider-Bashguard assemblies