The 806 is available in the XS size, & all sizes sport more compact geometry than the 801 or 805. That means slightly less length for more comfortable reach suiting riders with shorter proportions. The 806 uses the brand new SLX M7000 Shimano groupset This 1 by 11 set up uses the latest Shadow Plus clutch rear derailleur combined with an FSA Comet narrow-wide chain ring for perfect chain control.WTB TCS i 23 Asym rims with Maxxis TR front & rear specific tyres combine to make a puncture-resistant, Tubeless Ready package, with enough grip to fully exploit the 800 series trail geometry. • Shimano SLX M7000 1 BY 11 drivetrain • Compact geometry & sizing down to XS for smaller riders • Adjustable air-sprung Rock Shox Recon Silver suspension fork • Tektro Auriga Hydraulic Disc Brakes