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e*thirteen Helix Cassette Cluster 42-50T 12 Speed Eggplant
e*thirteen Helix Cassette Cluster 42-50T 12 Speed Eggplant

Ethirteen Helix Cassette Cluster 42-50T 12 Speed Eggplant 42 - 50t

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In the unlikely event that you are dissatisfied with your purchase please feel free to return your goods within 30 days of the purchase date for a full exchange or refund. Any item (excluding food and underwear) can be returned to us for any reason provided it is returned in ‘showroom condition’, with its original packaging, tags and a valid receipt/delivery note.

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South Downs Bikes
Internet Department
28 West Street
West Sussex
RH20 4EE

If you wish to return your bike to us please keep it in the box it arrived in and contact us and we will arrange a collection.

Please note the following:

  • a) If we have sent you the incorrect bicycle, we will cover the cost of collection and delivery of the correct model.
  • b) If we have delivered the bicycle you ordered, but upon inspection you decide it is not the bike for you, we will charge you £50.00 for the collection.

Please do not ride the bike as a full refund cannot be given if the bike has been used or damaged.

Ethirteen Helix Cassette Cluster 42-50T 12 Speed Eggplant 42 - 50t




    • 556% more range than any other cassette on the market

    • 42,50

    • weight*: 345g

    • compatible with SRAM and Shimano 12speed drivetrains

    • improved shifting performance including Shimano 12 speed compatibility

    • improved interface between steel and aluminium clusters

to complete your cassette you will need:

e13cs2012 9-36 cassette cluster

the helix advantage

the helix r 12-speed cassette is an upgrade to any SRAM eagle drivetrain, with more range than any other cassette on the market. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance, but an overall lighter drivetrain. The aluminium one-piece 42/50 tooth cluster is easily replaceable so riders can keep their steel cluster for multiple seasons and freshen up granny as needed without buying a whole new cassette.

What is helix?
It's in our dna to solve problems. Helix components are engineered to bridge the compatibility gap between SRAM and Shimano components, ensuring versatility and flawless performance. Future-proof your bike with e*thirteen helix.

works flawlessly with Shimano and SRAM 12s drivetrains despite the challenges in designing for the different cog spacing and chain behavior. Additionally, if your wheel has a SRAM xd driver and you want to upgrade to Shimano 12s, you not only save money on the cassette, you dont have to spend the extra on a new hub driver either.

Service and tech support
unlike SRAM eagle, helix r cassettes have replaceable gear clusters. That means ongoing service and replacement costs will be less than half that of SRAM cassettes.

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