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- USA
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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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For Your Every Summer RSVP, with Code: SUMMER15
Description
fixed gear chainring Retrospec Mantra Fixed-Gear/Single-Speed Crankset – SGV BicyclesHere is the Mantra Crankset. This upgraded three piece crankset is made of a lightweight alloy crank combined with a steel chainwheel for superior strength and a smooth cadence every ride. Its better forged, which means the material is denser and stronger but still lighter than steel. With this beefier crankset, you get more power to the ground, which means youre going faster with less deflection. The thicker arm and different bolt pattern featured on
The Details
The crank arm measures 170mm and doesn’t have any overlap of crank arm and chainring bolts. The standard bolt circle diameter (or BCD) is 130mm. It accommodates 9/16” pedals.
Ride Like You Want To
Available in a ton of colors and sizes, you can pick the right choice for you and your bike. A smaller size will make accelerating simpler while a larger size will increase your highest speed.
Specifications
- Three-piece forged aluminum crankset
- All new crank arm design is much stronger for faster, more aggressive riding
- Fits on road, mountain fixies, BMX, track, and single-speed bikes
- 170mm Crank Arm Length without any overlap of crank arm & chainring bolts
- Standard Bolt Circle Diameter (BCD): 130mm
- Fits 9/16" pedals
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
4.8 ★★★★★
Based on 1177 reviews
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Product Reviews
★★★★★ 3
It’s ok
Style: BE-157P 1-Pack
Not a perfect fit, decent quality. Fair product since it was significantly cheaper than the manufacturer filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
★★★★★ 5
Great replacement for when the originals break, because they will.
Style: Matte Black Single Slat, Size: E46（2002-2005）4-Door
These fit well and look good in flat black. Price is good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
★★★★★ 3
It fits, but just barely, so it's good that it is sturdy
Style: Matte Black Single Slat, Size: E46（2002-2005）4-Door, Style: Matte Black Single Slat, Size: E46（2002-2005）4-Door
First and foremost, this part is a fairly poor copy of the OEM part. It's close enough to look good from about 20 feet away, but on close inspection, it has gaps all around.
It doesn't follow the curve of the opening properly, and the contours aren't quite right, making it so the outer top corners aren't recessed the way they are supposed to be (see pictures). Some of the tabs don't interface with their mating surfaces because the part is about 5mm too small in the y-axis (see picture).
That said, after ordering another similar knock-off, this one is the better of the two. The matte finish is truly matte. The grill slats are thick and beefy, like OEM. The tabs are stout and flexible, not brittle. After much fussing with installation, you should be able to bend your hood tabs (not that you should have to) so all tabs will lock in place.
The hardest part for me was getting the outboard-most tab to properly snap in, since the outer top corner of each grill doesn't sit flush inside the recessed relief where it's supposed to sit.
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Reviewed in the United States on March 6, 2025
★★★★★ 5
Why pay OEM prices? These kidney grills fit excellent!
Style: Matte Black Single Slat, Size: E46（2002-2005）4-Door
Was a bit skeptical but the fit and quality are excellent. The do not wobble around or fit loosely. Highly recommended.
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Reviewed in the United States on November 18, 2024
★★★★★ 4
good product
Style: Matte Black Single Slat, Size: E46（2002-2005）4-Door
The product is good, lasts a while, and looks very good.
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Reviewed in the United States on December 16, 2025
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