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Description
e*thirteen Helix R Chainring - 34t, 11/12-Speed, 52/55mm Flip Flop CL, 3.5mm Offset, e*thirteen DM, Blacke*thirteen Helix R Direct Mount Chainrings, manufactured from durable AL 7075 T6, combine aesthetics and design efficiency. Their flip flop design accommodates Boost or Super Boost chainlines. With e*thirteen's narrow wide tooth profile, they ensure enhanced chain retention, reduced wear, and compatibility with Shimano and SRAM chains. Perfectly complementing all Helix Cranks, they're backward compatible with e*thirteen TRS, LG1, and XCX Race cranks.
e*thirteen Helix R Direct Mount Chainrings, manufactured from durable AL-7075-T6, combine aesthetics and design efficiency. Their flip-flop design accommodates Boost or Super Boost chainlines. With e*thirteen's narrow-wide tooth profile, they ensure enhanced chain retention, reduced wear, and compatibility with Shimano and SRAM chains. Perfectly complementing all Helix Cranks, they're backward compatible with e*thirteen TRS, LG1, and XCX Race cranks.- Direct Mount design for use with Helix cranks, adjustable chainline TRS/LG1 cranks, and XCX Race cranks
- M4 narrow-wide tooth profile provides Shimano and SRAM 11/12-speed chain compatibility, excellent chain retention, and reduced wear
- Convenient flip-flop design, compatible with both Boost and SuperBoost chainlines (52/55mm)
- e*thirteen's Quick Connect direct mount interface keeps the system secure and creak-free
- Forged from premium 7075-T7 aluminum, then extensively CNC optimized for light weight, and technical aesthetics
- Durable 7075-T6 construction for long wear-life, stiffness, and strength
Product Specifics
- Tooth Count: 34
- Drivetrain Speeds: 11
- Drivetrain Speeds: 12
- Round or Oval: Round
- Offset: 3.5
- Material: Aluminum
- Color: Black
- Weight: 57
- Defined Color: Black
- Direct Mount Type: Direct Mount e*Thirteen
Today's Stock Status
Currently not available
UPC: Not available
EAN: 4711280340927
Manufacturer Part Number: CR4HRA-143
CR4206
183053-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]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
best bra for big chested girls!!!
Size: Medium, Color: White (100)/Halo Gray
The best sports bra!!! I’m a D normally if we are talking Victoria secret they would probably say I’m wayyy farther down the alphabet. Basically I’m pretty big chested and this bra is everything I could ever want. Not only does it actually hold up the girls but I can jump and they will hardly move. The biggest problem I have with sports bras is there’s zero support and my boobs kinda just sag but this actually make me feel like I’m three cup sizes smaller! I did size down to a medium but it still fits me perfectly. I’m going to order this is every color just because ITS THAT GOOD!
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Reviewed in the United States on March 30, 2026
★★★★★ 4
Runs small; size up!
Size: Large, Color: (648) Prime Pink / / White
Nice! Size up! I ordered a large and it fits great! I'm 8-10, medium in everything else so I thank previous comments saying it runs small. It was quite comfortable, but if it is moisture wicking, I sure couldn't tell!
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Reviewed in the United States on October 8, 2025
★★★★★ 5
SIZE UP
Size: X-Large, Color: Black (001)/Jet Gray
Great material! However, has little to NO stretch so would highly recommend sizing up two sizes. I sized up one size and it BARLEY fits lol
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Comfortable
Size: Small, Color: Blue Atlantis/Washed Navy
Is super comfortable, it has removable pads. The color is beautiful (blue). Is like a medium support, but is keeps them in place!
Would be buying more.
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Reviewed in the United States on March 19, 2026
★★★★★ 3
Not My Favorite
Size: X-Large, Color: (401) Team Royal / / Black
I am on the fence with this product. I generally love Under Armour clothing, and the color is great. It fits well, too. But this sports bra has removable pads in it, and when I went to wash it, they got all turned around. The way you take out the pads and put them back in is pretty narrow, so it’s kind of hard to do. So I tried stitching them in place, but that didn’t work, they still got lumpy. Finally I just pulled them out and I use the sports bra without the padding. I suppose I should’ve just pulled the padding out each time I washed it, but it seems to me they need washing too? I don’t think I would buy this again.
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Reviewed in the United States on June 14, 2025