These hubs are FH-M9110 and FH-M9111 and come as a from and rear set. Front hub specs are: - 15mm x 100 Thruaxle - 28 Hole Count - E-bike Compatible - Centerlock Lockring Included - Weight is 134 grams Rear hub specs are: - 12mm x 142 Thruaxle - 28 Hole Count - 12 Speed Microspline Hub Body - E-bike Compatible - Centerlock Lockring Included - Weight is 231 Grams XTR Freehub bodies are high engagement hubs, engaging every 7.6 degrees. Fits Microspline cassettes up to 10-51 range. Both are brand new in packaging.