SIDI revolutionized mountain bike shoe design with the Sole Replacement SystemŪ
(SRSŪ), allowing mountain bikers to replace the most wear-heavy part of the
shoethe sole. SIDIs global patent on the SRSŪ sole means SIDI is the exclusive
producer of MTB shoes with replaceable tread.
The SIDI SRSŪ
sole allows SIDI to maximize both traction and durability. Since the tread is
replaceable, SIDI can use an aggressive, softer durometer in the tread for
increased traction in slippery conditions.
The SRSŪ sole on
the Spider models features a more generously sized polyurethane anti-slip insert
beneath the instep, which helps during less-than-perfect cyclocross remounts,
making it ideal for cyclocross racers.
tread blocks for Spiders
pre-Carbon Dragon (tread compound is softer than the original Dragon compound)
May also be used
with other earlier (non-Carbon) SRS SolesŪ