Maxxis ignitor xc mtb tyrethe ignitor tread pattern was designed for the most discerning professional racers and has laid claim to multiple world cup victories the well spaced tread pattern fills in nicely to provide low rolling resistance in the straights while the ramped pentagonal knobs provide excellent traction in the corners and in medium soil featuresdirectional ramped pentagon knob design front or rearexcellent multi condition performancespecificationssize26 x 21 etro47 559tpi