In August, Transition updated the Sentinel 29er with modern trail bike geometry and updated specs like Boost axle spacing and metric shocks. Now, the Transition Sentinel Carbon adds a grand to that bike’s prices but brings frame weight down to a claimed 6.83lb (3.1kg)…almost 2.5 pounds (1.1kg) lighter than the alloy model!

2018 Transition Sentinel Carbon 29er trail mountain bike

The Sentinel Carbon maintains the same geometry, hardware and top two complete bike build options, but upgrades the frame to a full carbon front and rear triangle.

2018 Transition Sentinel Carbon 29er trail mountain bike

Their GiddyUp suspension platform keeps it lively, with the rider well supported when pedaling, but ready for the big hits with 140mm of travel. Up front, a 160mm fork handles the initial impact and helps keep those big wheels rolling. The Sentinel was designed, as they put it, as the 29er for riders who hate 29ers, using their stretched top tube, short stem and upright seat angle to keep the rider in an aggressive position that works well in both high and low speed situations:

2018 Transition Sentinel Carbon 29er trail mountain bike geometry chart

Full specs listed below, but the pictures tell the story pretty well:

2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike

  • Speed Balanced Geometry
  • Boost 148 Dropout Spacing
  • Trunion Metric Shock Sizing – 205mm X 57.5mm
  • Enduro Max Sealed Bearings
  • Threaded Bottom Bracket
  • Molded Rubber Downtube & Chainstay Protection
  • New Rattle Free Internal Cable Port Covers
  • External Rear Brake Routing
  • 180mm Post Mount Brake
  • Collet Main Pivot
  • Water Bottle Storage Inside Front Triangle
  • Tire Clearance up to 29″ x 2.5″
  • 6.83lbs / 3.1Kg Frame w/shock and hardware
  • $2999 USA MSRP / Frameset
  • $4999 USA MSRP / GX build
  • $5999 USA MSRP / XO1 build

2018 Transition Sentinel Carbon 29er trail mountain bike 2018 Transition Sentinel Carbon 29er trail mountain bike

Available early 2018, get it in Transition Blue or Black Powder.

TransitionBikes.com

2 COMMENTS

  1. First of all, I don’t think they look as good. That’s just my opinion. But 2.5 pounds lighter seems a little hard to believe seeing as how most carbon frames save about a pound over their aluminum counterparts.

    • Transition have altered the design of their frames for 2018. The alloy models have new stays and new bearings, which makes them all substantially heavier. The previous models were too lightly built and suffered failures because of it.

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