Under Tack Show Videos and Stride Length Data for Two-Year-Olds in Training
EQUIX advances the Two-Year-Old Sale selection process with this extraordinary video analysis. Each horse's Under Tack is available in a slow motion format giving you a detailed view of Stride Quality, Efficiency, and other key variables that are performance predictors in two-year-olds.
Please SIGN UP above to view our COMPLIMENTARY Under Tack Videos and to check out our Stride Data pricing for each Sale.
What is a ProStride Qualifier?
EQUIX calculates the Average Stride Length and clocks the Gallop-Out times for each horse. Based on the horse’s Average Stride Length and official Under Tack Time, the horses are mathematically Ranked and sorted by Quartile for each show.
Horses that rank in the First and Second Quartile show greater Stakes Winning potential, based on our research since ProStride™ was launched ten years ago.
78% of SWs and 84% of GSWs sold at the juvenile sales have First or Second Quartile Under Tack data.
Our EQUIX ProStride™ video technology will help you select 2YOs whose stride length and efficiency reveal stakes-winning potential. Some of our 2025 stakes-winning ProStride™ data qualifiers include GSWs: Bear River, Booth, Cabo Spirit, Caitlinhergrtness, Cavalieri, Chancer McPatrick, Dream On, Durante, El Potente, Fast Market, Gaming, Governor Sam, Gun Song, Innovative, Irish Maxima, Italian Soiree, May Day Ready, Maysam, Mystic Lake, Nysos, Praying, Pilot Commander, Raging Torrent, Ready for Candy, Shisospicy, Skippylongstocking, Speed King, Taking Candy, Tenma, Usha, Velocity, Vixen, Warming and others. Click on our Stakes Gallery to view recent stakes winners.
Stakes-winning 2yos in 2025 include: Argos, Brant, Bottas, Cy Fair, Desert Gate, Ewing, Explora, Further Ado, Ground Support, Himika, Intrepido, Iron Orchard, Kingsolver, La Ville Lumiere, Revera, Ritzaphena, Sassy C W, Solitude Dude, Throckmorton, Trendsetter, and Yaupon de Replay.
Other ProStride™ standouts include Grade 1 SWs: Adare Manor, Arabian Knight, Arabian Lion, Café Pharoah, Carson’s Run, Cogburn, Colonel Liam, Country Grammer, Du Jour, Eda, Faiza, Gamine, Instilled Regard, Iscreamuscream, Kingsbarns, Knicks Go, Mage, Midnight Bisou, Mitole, Mixto, Muth, Practical Move, Saudi Crown, Speed Boat Beach, Taiba, Varda, War Like Goddess, Win for the Money, and Yaupon.
| Nysos | Counting Stars |
| Skippylongstocking | Further Ado |
2027 Sales
Prices
TBA
To Order
Prices
TBA
- Under Tack Show Data for
Entire Sale - All Horses
Workout Times Given - Avg Stride Length
- Gallop-Out Times
- Stride Rank by Quartile
Per Hip$30
To Order- Under Tack Show Data on Per Horse Basis
- Your Selection
- Avg Stride Length
- Gallop-Out Times
- Stride Rank by Quartile
Recent November ProStride Qualifiers
Sultana won G3 Maple Leaf S. at WO
Speaker’s Speech won G3 Grey S. at WO
Sunday Finery won G3 Mazarine S. at WO
Paradise Valley won G3 Bold Ruler S. at Bel
Recent October ProStride Qualifiers
Further Ado won G1 Breeders’ Cup Dirt Mile at Kee
Bottas won G2 Bryan Station S. at Kee
Warming won G2 Dance Smartly S. at WO
Let Em Know won G2 Pilgrim S. at Bel
Brickyard Belle won G3 Matron S. at Bel
Repo Man won G3 Zuma Beach S. at SA
Vanta won G3 Surfer Girl S. at SA
Ground Support won G3 Glen Cove S. (1st div) at Bel
Epic Style won Perfect Sting S. at Bel
Artislas won Lure S. at SA
Eternal Legacy won Manzano S. at Alb
Canada won Cup & Saucer S. at WO
D I Wire won New York Breeders’ Futurity at FL
Tirupati won Swingtime S. at SA
Hammy won Our Dear Peggy S. at GP
Recent September ProStride Qualifiers
Forged Steel won G1 Goodwood S. at SA
Miss Monica won G1 Del Mar Debutante S. at Dmr
Stradale won G2 Gallant Bob S. at Prx
Reagan’s Flame won G2 Presque Isle Downs Masters S.
at Pid
Cabo Spirit won G2 City of Hope Mile S. at SA
Mashallah won G3 Prioress at Sar
Tomasello won G3 Singspeil S. at WO
Dragon Welds won G3 Korea Sprint at Seo
Usha won Open Mind S. at CD
Hidden Overture won Selima S. at Lrl
Coast Highway won Laurel Futurity at Lrl
Epic Style won Sweet Briar Too S. at WO
Buccherino won Stable Recovery S. at Prx
Icona Mama won Liberty Bell S. at Prx
D I Wire won Aspirant S. at FL
Glengarry won Dan Johnson Sprint S. at Prm
Hola Joey won David M. Vance S. at RP
Bottas won Gun Runner S. at KD
Citrus Springs won KD Juvenile Fillies S. at KD
May Day Ready won One Dreamer S.at KD
Velora won Seeking the Ante S. at Sar
Vanta won Del Mar Juvenile Fillies Turf S. at Dmr
Just a Touch won Colonial Cup S. at Cnl
Desert Gate won Shared Belief S. at Dmr
Sum of Success won Express Tour S. at GP
R Island Jewel won Three Rings S. at GP
Recent August ProStride Qualifiers
Explora won G1 Test S. at Sar
Warming won G2 Yellow Ribbon S. at Dmr
Bottas won G2 National Museum of Racing Hall of Fame S. at Sar
Proletariat won G2 Del Mar Derby at Dmr
Reagan’s Flame won G3 Seaway S. at WO
Stradale won G3 Mahony S. at Sar
From Dusk won G3 CBC Sho at Cyo
Micanopy won Smarty Jones S. at Prx
Katie’s Grace won Bison City S. at WO
Sum of Success won In Summation S. at GP
Fire Pit won State Representative’s Sprint S. at Prx
My Kid’s Said No won Debutante S. at Asd
Sea Strike won Curlin S. at Sar
Cloe won Hummingbird S. at Elp
Mashallah won Tyson Gilpin S. at Cnl
Verifire won Reigh Count S. at Cnl
Iron Orchard won Fleet Indian S. at Sar
Greyjoy won NY Stallion Statue of Liberty S. at Sar
Seneca Park won Untapable S. at KD
Recent July ProStride Qualifiers
Counting Stars won G1 CCA Oaks at Sar
Local Knowledge won G2 Amsterdam S. at Sar
My Miss Mo won G3 Monmouth Oaks at Mth
Cy Fair won G3 Coronation Cup S. at Sar
Baltic Fire won Osunitas S. at Dmr
Irish Maximawon Dashing Beauty S. at Del
Inveigled won Yorktown S. at Cnl
Proletariat won Oceanside H. at Dmr
Doncho won William Garrett H. at Ind
Booth won Iowa Sprint S. at Prm
Paradise City won Saylorville S. at Prm
Vincey Girl won Powder Break S. at GP
Seminole Chief won Jonathan B. Schuster Memorial S. at Ind
Nola Queen won D. S. Shine Young Futurity at Evd