One of the latest trends in the industry is a species of 29er that has an ever deepening travel range. With wagon wheel bikes getting into the five inch game, forks like RockShox's SID XX Solo Air 120 Fork are replacing 100mm forks as the go to choice for 29ers. The addition of Power Bulge bushings which reinforce the fork at the axle for better power transfer and more confident tracking through lines further strengthen the case that a 29in wheels don't automatically preclude mid travel suspensions. The SID XX also includes the same race ready Motion Control DNA damping system found in the more expensive World Cup model. Fighting off gravity and wallow is in this system's DNA, and it uses external rebound and incorporates separate circuits for low and high speed compression. The damping is remotely adjustable with the included XLoc remote, so you can dial it for high riding sensitivity over consecutive bumps or larger impacts to maintain speed across flats and descents and protect the gap you worked so hard to open up on the previous climb. The Solo Air spring is also easy to tune with a single Schrader valve, which adjusts both the negative and positive chambers at the same time, and RockShox's Bottomless Tokens, which alter the chamber's effective volume to dial in the compression curve and meet individual ramp up preferences. Pairing all this with a Rapid Recovery valve that rebounds quickly after full impacts to prep for the next hit means you'll stay in control across root latticed climbs and rocky descents.