BMAI Jingtan 4 - Red

BMAI Jingtan 4.0 Carbon Plate Marathon Racing Shoe

A flagship carbon-plate marathon racing shoe with a T1000 carbon fibre plate, a wider Boom MAX+ midsole and a breathable kite yarn upper. The brand says it is faster, more stable and stronger than before, and built to hold up in the second half of a race when fatigue and heat set in.

Key Features

• T1000 carbon fibre plate: a full-length solid plate tuned to a 31.8° toe-spring. The brand states stiffness is up 27.8% and propulsion up 30% (BMAI lab data), and that the plate stays effective beyond 35 km.
• Boom MAX+ midsole: nylon foam, supercritical foamed, with a lightweight, high-rebound formula for lasting energy return.
• Wider platform: the midsole is 4 mm wider at the forefoot and 6 mm wider at the midfoot than the Jingtan 3.0 TURBO (size 42, brand figures). This gives a larger landing area and a more stable feel.
• 4.5 mm drop: designed for a smooth transition from cushioning through to push-off.
• Kite yarn upper: a light, tough, tear-resistant mesh that stays cool and breathable.
• One-piece elastic tongue: locks the foot in without shifting.
• Wheat-ear elastic laces: the non-slip pattern keeps them from loosening.
• Heel pillow lining: follows the heel curve to lock it in, with a soft cat’s-tongue fabric on the inner side.
• Fixed inner insole: stays in place on long runs and reduces friction.
• Control Unit PU outsole: lightweight non-slip PU with a 2 mm wear-resistant granular pattern for grip and cornering stability. The brand says it supports 15–20 high-intensity marathon training sessions.

Specifications

• Upper: mesh yarn
• Midsole: nylon foam (Boom MAX+)
• Outsole: polyurethane (PU)
• Plate: T1000 carbon fibre, full length, 31.8° toe-spring
• Drop: 4.5 mm
• Weight (per shoe): about 172 g (men’s size 41); about 135 g (women’s size 37)

Men’s Size Guide

Women’s Size Guide

Fit tip: Size up half a size to one full size if you have a high instep or wide feet. Size down half a size to one size for a flat instep or slim feet. Men’s and women’s lasts use different allowances.