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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
E*thirteen XCX Ultralight Guidering (5mm Boost), 34t - BlackDirect Mount Guidering for Quick Connect compatible cranks Dual width 'M' tooth profile engages the chain securely even at extreme angles 7075 T6 aluminum construction optimized for all chainguide systems to prevent chain jamming, 49mm chainline Requires spider lockring removal tool (EV 8550) Compatible with any TRS series crank and spiderless LG1 series cranks Today's Stock Status 2 Available to ship in 2 4 Business Days UPC: Not available EAN:
- Direct Mount Guidering for Quick Connect compatible cranks- Dual width 'M' tooth profile engages the chain securely even at extreme angles
- 7075-T6 aluminum construction optimized for all chainguide systems to prevent chain jamming, 49mm chainline
- Requires spider lockring removal tool (EV-8550)
- Compatible with any TRS series crank and spiderless LG1 series cranks
Today's Stock Status
2 Available to ship in 2-4 Business Days
UPC: Not available
EAN: 4710751505186
Manufacturer Part Number: CR3UNA-108
EV8612 CR1497
141895-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.8 ★★★★★
Based on 159 reviews
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Product Reviews
★★★★★ 4
High Quality
My husband is deficient in magnesium and these by far looked like they were of the highest quality . Not sure yet if they help him sleep better but will be purchasing them again.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Better sleep, better mood
This definitely helped my mood and sleeping. It literally changed my default. The only electrolyte that can pass the blood brain barrier. I recommend.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
For better sleep and consultation and calming effect.
It seems to work for me, it makes me calm but energetic, plus I sleep for 8 hours since taking it.
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Reviewed in the United States on May 10, 2026
★★★★★ 3
Not working for me 100%
Still not sure about how this magnesium affects me. I have only been taking one tablet an hour or two before bedtime. Seems like sometimes I can’t go to sleep after taking it, charges up my brain. Other times I sleep but have crazy dreams. Maybe it works for some, but not others. I’ll try to finish the bottle, but the lack of sleep after taking the Magnesium L-Threonate makes me hesitant to continue some nights. That’s mainly the reason I purchased this brand to include the reviews.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Helps Relax the muscles
I like to take a magnesium supplement daily, usually in the evening before going to be as it helps relax me for sleep
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Reviewed in the United States on May 3, 2026