Ethirteen Helix Sram XD Cassette 12s 13-52T

Ethirteen Helix Sram XD Cassette 12s 13-52T

Marsoni

M251S

$284.50

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

Ethirteen Helix Sram XD Cassette 12s 13-52Te*thirteen Helix Race Cassette 12 speed 13 52T Eggplant Compatible with Sram XD and XDR drivers A close ratio cassette specifically for e bikes. 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

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I've been buying these for well over a year now as Subscribe and Save. I work 12 hour overnights as a nurse. My sleep schedule normally gets messed up. I would have no problem falling asleep but would wake up only a few hours later which is not good when you have work again that night. We buy these on Amazon due to the great price and the fact that they are extended release which helps keep me asleep longer. When I take 1 or 2 of them, I am able to sleep about 7-8 hours which is great. I take this both when I sleep during the day and sleep during the night. It helps me sleep no matter when and I am able to adjust my sleep schedule often. I have recommended them to many.

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Reviewed in the United States on January 10, 2013

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PSBone

Boise, US

★★★★★ 4

Works quite well, dose still a bit high for me

Used to take the Natrol 5mg slow release, now that I can compare these 2, I love this more. It doesn't make me feel too edgy, it's quite relaxing actually. I still have to halve the dose as the full dose makes me groggy the next day. Where the Natrol gave me very vivid, but not unpleasant dreams, these don't make me dream as vividly. It does take a bit longer to get me to sleep, but once asleep, your asleep. Highly recommend, once I finish this bottle, I'd get the 2mg tr next time, as a lower dose works better for me.

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Reviewed in the United States on July 10, 2014

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Eudy Ernesto De León Batista

Houston, US

★★★★★ 5

Excelente Muy Satisfecho

Servicio excepcional, cuidadoso, el producto muy bien empacado. Y el tiempo de entrega fue el acordado. Y del producto ni hablar, excelente.

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Reviewed in the United States on February 3, 2026

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Dog Mom

Grantham, US

★★★★★ 5

seems to work just fine

Helps me sleep. I also use Mg, B complex and medical cannabis oil before bed. My sleep isn't great otherwise here in the good ol' USA (unlike in Europe where I sometimes go for complicated issues/not vacation; which indicates issues with the much higher radiofrequency exposure allowed in the US than in the European country where I sleep like a happy baby). Just wait for 5G, then I probably need to reinvent my sleep protocol if I want to get any rest. But well, with the 5G impact on the biosphere, we may not be here much longer then. That means we better stop 5G before it's all roleld out.

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Reviewed in the United States on August 2, 2019

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S.J.

Whiting, US

★★★★★ 5

The product is worth purchasing!

I find that the time release melatonin works for me. The cost is reasonable, shipping directly to the home works well.

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Reviewed in the United States on September 6, 2025