MIDSOLE TECHNOLOGY

Midsole Technology

Designing a midsole that also connects to the leather upper helps keep riders’ feet closer to the sole.
This minimizes stack height, improves fit, and keeps the foot securely in place while pedaling.
It also reduces power loss and prevents fault-induced failure.

SEAMLESS MIDSOLE STRUCTURE

Conventional Structure Seamless Midsole Structure Lasting board Lower stack
height
InsoleSEAMLESS MIDSOLE STRUCTURE

LOWER STACK HEIGHT STABILIZES PEDALING STROKES AND MAXIMIZES EFFICIENCY.

ROAD

SHIMANO engineers and researchers discovered reducing stack height, the distance between the sole and pedal axis, stabilizes pedaling strokes and increases power transmission efficiency. A lower stack height is especially important when applying high levels of downward force on the pedals.
Our mid to high-end RC shoes and TR501 Triathlon shoes now share the same S-PHYRE seamless midsole structure first introduced in our pro-level RC9 series shoes.

Midsole Structure

1.ADJUST
TIGHTNESS
2.MIDSOLE LIFTS 2. 3.FOOT MAINTAINS CLOSE
CONTACT WITH MIDSOLE
For Road

On-road shoes: Stack height

Shoes Sole
thickness
(mm)
Midsole Structure
Sole bottom to
Upper inside
SPD-SL RC902 4.9 X
RC902T 4.9 X
RC702 5.5 X
RC502 6.5 X
RC300 6.5 X
RC100 10.0  
TR901 6.6  
TR501 6.5 X

MTB

MTB shoes with a lower stack height also benefit from improved pedaling efficiency and bike control.
All of our MTB racing shoes have an original midsole structure that provides more stable and efficient pedaling to riders of all levels.

Midsole Structure

For Road

Off-road shoes: Stack height

Shoes Sole
thickness
(mm)
Midsole Structure
Sole bottom to
Upper inside
SPD XC902 4.7 X
XC702 5.9 X
XC502 5.9 X
XC300 5.9 X
XC100 5.9 X
RX800 9.1