With #Silca SpeedChip and EnduranceChip, you have power to tweak your chainwax to where you ride and how. Want max usage time? EnduranceChip is the move with up to 750k of run time. Doing a weekly summer crit series? SpeedChip is our fastest wax to date increasing efficiency another .6% or about 2w at 300w of power (it just doesnt last as long about 10hrs of usage time) They can also be mixed and matched without direct cancellation you will get some of benefits of each chip.