While visually similar to this pair this wheelset is designed for a completely different use and rider. The ZTR Race wheelset is designed for race use for a light rider whereas this wheels is designed for a heavier rider and will see much more use.
Rims are the heavier, more durable ZTR Olympic at 361g each. While still being a light-weight XC rim these can take a real bearing and last well. Spokes are stiffer DT Swiss Competition and brass nipples are used on the rear wheel for a bit more durability. While still being very light at 1633g these wheels should last a loonnnng time.