Helix Race Cassette | 12 Speed

e*thirteen turned the bike world on its head with the introduction of the 9t sprocket on our original TRS cassette in 2015, and we’ve never looked back!

The newest generation of e*thirteen Helix cassettes deliver more range than the competition with unmatched cross-compatibility for flawless shifting performance with SRAM™ and Shimano™ drivetrains. Lighter in weight, they also enable you to shave grams by stepping down a chainring size.

Our cassettes also maximize service life by enabling you to replace the steel or aluminum parts separately; and they come in a rainbow of colors to match your style! Reduce weight, increase range, personalize your bike, and experience freedom of choice with e*thirteen Helix cassettes.

PRODUCT SPEC Compatibility - Please reference our hub compatibility article to ensure the e*thirteen cassette will work on the hub you have before purchase.
Freehub Mount - XD™ and XDR™ Drivers Only
*Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit

Options include:

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HELIX R 12-SPEED 9-45T GRAVEL CASSETTE
Weighing in at a svelte 319g, this light weight engineering marvel offers an industry leading 500% gear ratio, due to e*thirteen's exclusive 9T highest gear cog.

A drop-in replacement for SRAM™ XPLR™ 10-44T Cassettes - A 13% increase in range!

Compatible with XPLR and Eagle Derailleurs
**Not recommended for ebike use. For ebike applications we recommend our TRS+ e*spec or Helix Plus cassettes.**

PRODUCT SPEC

Range - 500%
Size - 9-45T: 9-11-13-15-17-19-22-25-28-32-38-45
Speeds - 12 Speed
Weight - 310g
Colours - Grey/Nickel & Intergalactic/Nickel

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Helix Race Cassette | 12 Speed | 9-50T

Helix R 12-speed, 556% Range, 345-Grams

PRODUCT SPEC

Material - 2 aluminum cogs, 10 steel cogs
Range - 9-50T: 556%
Speeds - 12-Speed
Teeth - Aluminum Custer: 42,50t
Steel Cluster: 9,11,13,15,17,20,23,27,31,36t
Weight - 345g
Colours - Grey/Nickel, Orange/Nickel, Purple/Nickel, Bronze/Nickel & Intergalactic/Nickel
(PVD finishing on Intergalactic model is twice as durable as regular annodising)
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HELIX RACE 12-SPEED 13-52T CASSETTE

As e-bikes have become more popular, we set out to engineer a close-ratio cassette specifically for them. Enter the Helix Race 13-52T - a new 12-speed close-ratio cassette, specifically engineered for steep terrain where climbing speeds are high, and descents are gravity-powered.

The 13T, in combination with a 32T chainring, at 85rpm cadence, will deliver speeds at or just above 32kmph/20mph, which is just beyond the speed-limited assistance of most e-bikes. The new 52T lowest gear and closer steps help riders clean the most technical climbs with newfound ease.

While the Helix R 13-52T was conceived with e-bikes in mind, it improves the ride experience for non-e-bike riders, too, allowing them to optimize their cadence on steep climbs and let gravity do the work on descents.

Like all e*thirteen Helix cassettes, the Helix Race 13/52t delivers seamless cross-compatibility with SRAM, Shimano, and TRP 12s drivetrains, as well as improved shifting precision and wear life. Weighing in at 467g, the cogs are reinforced for high-powered e-bikes, yet light enough for weight-optimized trail bikes.

Experience the advantages of a close-ratio cassette on your next ride, with the Helix R 13-52T.

PRODUCT SPEC

Material - 2 aluminum cogs, 10 steel cogs. PVD finishing on Intergalactic model improves durability and wear life.
Size - 13-52T: 13, 15, 17, 19, 22, 25, 28, 32, 36, 40, 45, 52
Speeds - 12 Speed
Weight - 467g
Colours - Grey/Nickel, Orange/Nickel, Purple/Nickel, Bronze/Nickel & Intergalactic/Nickel
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HELIX RACE 12-SPEED 9-52T CASSETTE

Widest range in the galaxy at 578%
Cross compatibility with Shimano, SRAM, and TRP drivetrains and chains
2-piece forged/machined design provides ease of assembly/service and reduces waste
Aluminum and Steel clusters can be replaced separately to reduce service cost
43-52t aluminum cluster backward compatible with 9-50T Helix Plus or Race cassettes
Unique 9T high gear allows use of smaller chainrings for clearance and weight savings
5 bright anodized or PVD color options
Tested extensively for analog and e-bike use
*Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit.

PRODUCT SPEC
Material - 2 aluminum cogs, 10 steel cogs. PVD finishing on Intergalactic model improves durability and wear life.
Range - 578%
Size - 9-52T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 43, 52
Speeds - 12 Speed
Weight - 404g
Colours - Grey/Nickel, Orange/Nickel, Purple/Nickel, Bronze/Nickel & Intergalactic/Nickel