For the Seismic front hub, Eclat based the internals and spec from the super popular Cortex front hub and updated the shell to match the Seismic rear cassette, Also the Female bolts have been increased to 35mm for better use with pegs. The Seismic is laced to Eclat's E440 rim. Lightweight at just 440g with a strong double walled design, The Eclat E440 has the edge over the competition. The tall profile provides rigidity while the straight side walls provide added assistance if you're running brakes. ###section### Product Specs WHEEL SIZE: 20" HUB: Eclat Seismic AXLE: 10mm Female RIM: Eclat E440 SPOKES: Stainless Steel NIPPLES: Brass WEIGHT: TBC