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27.5 vs 29er mountain bikes: Kirt Voreis RIP 9 RDO bike check, Part 1

Posted in: Blog
By Zack Vestal
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27.5 vs 29er mountain bikes: Kirt Voreis RIP 9 RDO bike check, Part 1

Kirt Voreis RIP 9 RDO 29er bike check

For a direct comparison of 27.5 vs 29er mountain bikes, look no further than Niner rider Kirt Voreis and his RIP 9 RDO. Both of them. He's got one of each and they're set up differently to best suit their intended rides.

Let's start with the 29er. He rides a size large which is 'true to size' for his lanky, 6-foot tall stature. As the bike will be used more for longer distances, pedaling, high speeds, and dare we say it, more "traditional" mountain bike trail riding, he's chosen the parts kit and rider position accordingly. 

This is a classic trail bike that's capable of tackling almost any terrain. Kirt is a talented rider who rides fast and charges hard downhill, but he's not afraid to pedal. With it's larger wheels and traditional spec, it's the go-to bike for most situations.

To fend off rock strikes and add flair, it's sporting a custom checkered flag frame protection system, courtesy of none other than Duct Tape

Up front, a Deity components cockpit holds Shimano controls. The fork and rear shock are by Fox Factory.

Because the 29er is going to be used on rides with more pedaling, faster speeds, and a variety of terrain, Kirt set up his bike with a complete Shimano Deore XT drivetrain with a 34T chainring and 10x51 cogs. The brakes are likewise Shimano XT, with 160mm rear rotor and 180mm front. 

The saddle and seatpost are SDG. This limited edition "Oso" print Radar Mountain saddle with lux-alloy rails makes a nice finishing touch for the bike!

Note that Kirt's fondness for bar spins requires a semi-custom headset and cable routing situation!


Here's Kirt's full spec for the RIP 9 RDO 29er.

Niner RIP 9 RDO 29, size large

  • Shimano Deore XT drivetrain 34x 10-51
  • Shimano Deore XT brakes 160r 180f
  • Deity BlackLabel bar 770mm
  • Deity Copperhead stem 50mm
  • Deity Knuckle Duster
  • Deity T-Mac pedal
  • SDG Tellis dropper post
  • SDG Radar OSO saddle
  • Stans Flow MK3 29
  • Schwalbe tires Eddie Current front 29 2.4 38psi
  • Fox 36 Fork 160mm 90psi
  • Fox DHX2 rear shock 475x2.75

Stop by next week for Kirt's 27.5 bike check to compare them back to back.