Beef Loin, Bottom Sirloin, Flap
USDA Spec
IMPS 2020 §185AIn simple termsThe bottom sirloin flap, also called bavette, the obliquus abdominis internus muscle from the bottom sirloin. A bistro and chef-driven steak cut, also sold heavy into Mexican-style carne asada programs. Main muscle: obliquus abdominis internus.
Individual muscle. Consists of the M. obliquus abdominis internus from the hindquarter and bottom sirloin butt, separated from the ball tip and M. tensor fasciae latae through the natural seam.
- Weight range
- 2-down to 3+ lb
- Key muscles
- obliquus abdominis internus
- Removed
- all bones, cartilages, heavy connective tissue
- Primal
- Loin
Last 6 months
Recent prints
| Date | Choice (¢/lb) | Select (¢/lb) | Ch/Se Spread |
|---|---|---|---|
| 2026-10-13 | 717.25¢/lb | 670.47¢/lb | +46.78¢/lb |
| 2026-10-12 | 774.71¢/lb | 667.95¢/lb | +106.76¢/lb |
| 2026-10-09 | 738.78¢/lb | 679.19¢/lb | +59.59¢/lb |
| 2026-10-08 | 732.21¢/lb | 720.00¢/lb | +12.21¢/lb |
| 2026-10-07 | 727.60¢/lb | 678.52¢/lb | +49.08¢/lb |
| 2026-10-06 | 769.74¢/lb | 737.24¢/lb | +32.50¢/lb |
| 2026-10-05 | 753.98¢/lb | 709.60¢/lb | +44.38¢/lb |
| 2026-10-02 | 733.01¢/lb | - | - |
| 2026-10-01 | 715.96¢/lb | 693.83¢/lb | +22.13¢/lb |
| 2026-09-30 | 835.98¢/lb | 697.33¢/lb | +138.65¢/lb |
| 2026-09-29 | 782.64¢/lb | 698.40¢/lb | +84.24¢/lb |
| 2026-09-28 | 707.80¢/lb | 726.42¢/lb | -18.62¢/lb |
| 2026-09-25 | 771.84¢/lb | - | - |
| 2026-09-24 | 736.83¢/lb | 727.01¢/lb | +9.82¢/lb |
Frequently asked
What is the current wholesale price of beef loin, bottom sirloin, flap?
717.25¢/lb as of 2026-10-13, Choice grade, from the USDA AMS National Daily Boxed Beef Cutout report. That's down 6.8% week over week.
Is loin, bottom sirloin, flap trending up or down?
Down 31.3% over the last six months. Offer side has been in control.
Who sets wholesale loin, bottom sirloin, flap prices?
No single seller sets it. Wholesale beef loin, bottom sirloin, flap is priced FOB plant in cents per pound and reported daily by USDA AMS as part of the National Daily Boxed Beef Cutout, Negotiated Sales (LM_XB403) report. Prices reflect weighted-average negotiated trades for delivery within 0-21 days.
When does demand for loin, bottom sirloin, flap run hottest?
Middle meats carry the summer grilling holidays and the December feature window. Retail and foodservice programs commit weeks ahead of those dates, so the wholesale pull arrives before the holiday itself.
What does IMPS 185A mean?
IMPS 185A is the USDA Institutional Meat Purchase Specifications code for Beef Loin, Bottom Sirloin Butt, Flap, Boneless (IM). It's the standard spec used in wholesale trading and procurement contracts.
About this cut
The flap meat of the bottom sirloin. Loose-grained, well-marbled. Popular in carne asada and bistro steak preparations.
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