With these caps you can convert wheels to another axis system your Cobalt.
9 mm: conversion of 15 x 100 mm plug axis at 9 x 100 mm quick release
15 mm: conversion of 9 x 100 mm quick release to 15x 100 mm slot axis
Compatibility: Cobalt 2 Cobalt 3 (from model 2011)
Delivery: 2x Crankbrothers Cobalt Adappterkappe (right and left)