Reebok Unisex ERS 4000 Shoes Size:8.5 310622-09: 203mm to 220mm Rear

310622-09: 203mm to 220mm Rear Post Mount Adapter (not compatible with 203mm Fork Mount)

Triax Fiberglass

it is now possible to lock the blade closed (safety in transport)

LANYARD INSERT: Included

High performance blended formula with additional boost additives

Reebok Unisex ERS 4000 Shoes Size:8.5 310622-09: 203mm to 220mm RearThe ERS 4000 will feature the original Energy Return technology system from the early 90's. There are many recognizable Reebok running Technologies over the years, but one of the most sought after and recognizable is ERS. Reebok Energy Return System features a soft , but very responsive Hytrel TPU tube from Dupont industries. This tech first launched in the late 80s in performance running and soon after became a staple of Reebok performance extending