The Jingtan 4.0 SL is BMAI's lightweight race trainer: no carbon, but still a fast, springy carbon-free trainer feel, with a three-section widened base and flat TPU midfoot plate for stability and anti-torsion. The ride is soft and highly adaptable, easier to handle than a carbon racer — great for runners building capability through high-mileage speed work, and a smooth step-up for newer runners.
Basic Information
| Brand | 必邁 |
| Model | 驚碳4.0 SL |
| Year | 2026 |
| Gender Version | Unisex |
| Category |
Tempo Run
Speed Training
|
| Terrain | Asphalt |
Technical Specifications
| Midsole Technology | Nylon-billet supercritical foam midsole (Evonik) with a flat TPU midfoot stabilizer plate and PU polyurethane outsole |
| Carbon Plate Structure | None (only a flat TPU midfoot stabilizer for anti-torsion) |
| Upper Material | Lightweight kite-gauze upper with an integrated knit sock tongue (three-section widened stability base) |
| Outsole Configuration | PU polyurethane outsole with starburst particle pattern, enhanced wet grip |
| Forefoot Thickness | 31.0mm |
| Heel Thickness | 35.5mm |
| Drop | 4.5mm |
| Weight | 195g |
Wearing Experience
| Fit |
Loose |
| Breathability |
(4/5)
|
| Stability |
High |
| Cushion Distribution |
Even |
| Feel Attribute |
Light and soft with high adaptability; with no carbon even slower paces feel comfortable |
| Bounce |
(4/5)
|
Runner Matching
| Running Style Recommendation |
Neutral |
| Runner Level |
Advanced |
| Weight Range |
Light |
| Width |
Standard |
| Arch Type |
Medium |
| Landing Type |
Midfoot |
Practical Information
| Price | $172.00 | Durability | 500 km |
User Review Summary
The BMAI Jingtan 4.0 SL (2026) is a lightweight race trainer BMAI independently developed for high-mileage training, not an iteration of a previous model. It shares the same Evonik nylon-billet supercritical foam as the Jingtan 4.0 with the same 31mm forefoot / 35.5mm heel stack and 4.5mm drop, but the key difference is the plate: the 4.0 SL has no carbon, only a flat TPU midfoot stabilizer for support and anti-torsion with little extra propulsion, so it feels genuinely comfortable even at slower paces. The three-section widened base — forefoot, midfoot and heel — secures anti-rollover performance in fast turnarounds and corners, making it more stable than the carbon version. The midsole tune emphasises resistance to compression, fatigue and foam crumbling, aimed at high-mileage, high-frequency speed training; at about 195g (EUR41) it runs roughly 20g heavier than the 4.0. It keeps the kite-gauze upper, integrated knit sock tongue, wheat-lacing anti-slip laces and heel memory-foam pillow, with a PU polyurethane starburst outsole for excellent wet grip. Positioned as a lightweight race trainer for advanced runners building a base through mileage and speed work.
Notes
必邁驚碳4.0 SL 輕量競訓鞋，獨立開發非迭代款。與驚碳4.0同源中底（贏創尼龍粗胚超臨界）同堆疊（31/35.5mm、4.5mm），但無碳板，僅扁平TPU中足穩定板；三段加寬底盤更穩，41碼195g。面向高里程速度訓練。官方發布數據。
【資料直翻，後續優化：無外部來源查證】
