ethirteen Helix Race espec Direct Mount Chainring for Bosch CX/SX - 34T, 13mm Offset, Black

ethirteen Helix Race espec Direct Mount Chainring for Bosch CX/SX - 34T, 13mm Offset, Black

Marsoni

M251S

$198.00

Get it in 3 business days with 1 day shipping. Friday, May 29

ethirteen Helix Race espec Direct Mount Chainring for Bosch CX/SX - 34T, 13mm Offset, BlackThe ethirteen Helix Race espec Direct Mount Chainring is the ultimate premium upgrade for high performance Bosch e bike systems. Forged and CNC machined from ultralight, high strength 7075 T6 aluminum, this 34T one piece direct mount chainring features a 13mm offset to achieve perfect chainline alignment on Bosch CX Gen 4, Gen 5, and SX motors. Equipped with an updated M4 narrow wide tooth profile, it ensures bulletproof chain retention and seamless

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Your ethirteen Helix Race espec Direct Mount Chainring for Bosch CX/SX - 34T, 13mm Offset, Black orders ship within 1-2 business days.

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We offer a 30-day return/exchange service after receiving.
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Reviewed in the United States on June 15, 2025

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Stephen B.

Fort Morgan, US

★★★★★ 5

No Hassles

Immediate payment - no hassles.

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Reviewed in the United States on March 19, 2026

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Gradient Echo

Whiting, US

★★★★★ 5

Hassle free experience!

Very impressed by how easy it was to file a claim online. I was expecting a hassle or a run around to make it more work than necessary, to discourage claims, but nope, super simple! I initially thought I would get a replacement product, but instead, they sent an Amazon e-gift card, which was even better, since the price of the product went up from when I originally bought it. With the gift card, I was able to replace it with a cheaper item. Definitely worth the low cost insurance!

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Reviewed in the United States on June 4, 2025

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Ralph Dole

Grantham, US

★★★★★ 5

Protection contract

Great company I’ve had them before and have been fortunate than I never have to use them, but I enjoy the protection.

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Reviewed in the United States on April 16, 2026

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RUSSEL NOLASCO