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This Product Ships Within 2-3 Business Days
Please Note: This product is usually available for shipment within 3 business days for orders placed before 6pm EST Monday through Friday. Call for in-store availability, not all items are available for immediate pickup. If we are unable to ship within these time frames due to rapid changes in revolving inventory you will be contacted via email.

2018 Transition Sentinel Alloy NX

Transition

Out of stock

Mountain Bike

Transition

The Sentinel was designed for 29er haters. A bike so capable, playful and fun that even the most staunch 29er nay sayer will instantly convert. With our reverse mullet suspension configuration, the Sentinel stays responsive and playful while delivering incredible downhill monster truck capabilities. Our new Speed Balanced Geometry is...
$ 2,999.00
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Stock Status
This Product Ships Within 2-3 Business Days
Please Note: This product is usually available for shipment within 3 business days for orders placed before 6pm EST Monday through Friday. Call for in-store availability, not all items are available for immediate pickup. If we are unable to ship within these time frames due to rapid changes in revolving inventory you will be contacted via email.

The Sentinel was designed for 29er haters. A bike so capable, playful and fun that even the most staunch 29er nay sayer will instantly convert. With our reverse mullet suspension configuration, the Sentinel stays responsive and playful while delivering incredible downhill monster truck capabilities. Our new Speed Balanced Geometry is our crown jewel that unlocks 100% of the potential of this bike. With SBG you get total confidence when it comes to cornering and climbing that really sets this bike apart from the crowd. 

 

 

X01 COMPLETE GX COMPLETE NX COMPLETE
 PRICE $4999 USD $3999 USD $2999 USD
  COLOR TR Blue, Black Powder TR Blue, Black Powder TR Blue, Black Powder
  REAR SHOCK Fox DPX2 Performance Elite Fox DPX2 Performance Elite RockShox Deluxe RT
  FORK Fox 36 Float RC2 Performance Elite 160mm RockShox Lyrik RC Solo Air 160mm RockShox Yari RC Solo Air 160mm
  HEADSET Cane Creek 40 Series FSA No.57E FSA No.57E
  STEM RaceFace Trubine R 35 (40mm) RaceFace Aeffect R (40mm) RaceFace Aeffect R (40mm)
  BAR RaceFace Turbine R 35 (800mm x 20mm) RaceFace Chester 35 (780mm x 20mm) RaceFace Chester 35 (780mm x 20mm)
  GRIPS ODI Elite Flow Velo Single Clamp Velo Single Clamp
  SADDLE ANVL Forge Stealth Cromo ANVL Forge Stealth Cromo WTB Volt Comp
  SEATPOST RockShox Reverb Stealth 1x Remote RockShox Reverb Stealth RaceFace Aeffect Dropper
  BRAKES SRAM Code RSC SRAM Code R SRAM Level T
  ROTORS SRAM Centerline (180mm) SRAM Centerline (180mm) SRAM Centerline (180mm)
  SHIFTER SRAM XO1 Eagle SRAM GX Eagle SRAM NX
  DERAILLEUR SRAM XO1 Eagle SRAM GX Eagle SRAM NX
  CASSETTE SRAM XG 1275 (10-50t) SRAM XG 1275 (10-50t) SRAM PG 1130 (11-42t)
  CHAIN SRAM GX Eagle SRAM GX Eagle SRAM PC 1110
  CRANK SRAM Descendent Carbon (30t, 170mm) SRAM Descendent 6K (30t, 170mm) RaceFace Aeffect (28t, 170mm)
  RIMS E*Thirteen TRS+ 30mm E*Thirteen TRS 30mm WTB STPi29
  HUBS E*Thirteen TRS+ Novatec D711SB & D462SB XD Novatec D711SB & D462SB
  TIRES Maxxis Minion DHF / DHR II 2.3 EXO 3C Maxxis Minion DHF / DHR II 2.3 EXO Dual Maxxis Minion DHF / DHR II 2.3 EXO Dual
  WEIGHT 32.2 lbs. / 14.61 Kg 32.6 lbs. / 14.79 Kg 33.6 lbs. / 15.24 Kg

 

 

 


 

 



 

A Holistic Approach To Mountain Bike Geometry

What is it about the human connection to the bicycle that brings us so much joy? How can such a simple mechanical device mean so much to so many of us? What if it was possible to heighten that connection? What would it take, what would it mean and how would you achieve it? 

Imagine a dream where you could ride without thinking about what your front wheel is doing. You stopped having conscious thought about whether it had traction or not, instead you just intuitively knew. In this same dream your bike could do exactly what you wanted it to at whatever speed your were moving. At high speeds it carved stable turns with supreme grip, and at slow speeds it was nimble and precise to maneuver tight turns. This was our dream. 

In the search for a better handling bike, we started by asking some simple questions. Why are mountain bikes becoming longer and slacker? The obvious answer is stability. Why is this good? It makes the rider feel safer and creates a more stable chassis at higher speeds or steeper terrain. Longer and slacker comes at a cost however, and that cost is realized at slower speeds or flatter terrain where the front wheel is too far ahead of the rider. This inhibits the rider's ability to properly weight the front wheel. What if it were possible to have a mountain bike that did all of this well? 

bal•ance
noun
1. an even distribution of weight enabling someone or something to remain upright and steady. "slipping in the mud but keeping their balance" 

Inspired by this dream, late in 2015 we initiated a research program led by our Blue Balls Development Team to discover ways we could make our current bikes handle even better. We began an extensive test cycle with different variations of fork offset and geometries. Why you ask? 

In the last 5 years, your mountain bike has changed in in many ways. Your wheels have likely gotten bigger. Your frame has gotten longer. Your head tube has gotten slacker. Your suspension has improved. Your stem has gotten shorter and your bars have gotten wider. And you likely have a remote dropper seat post opposed to a straight post. Your components have improved in ways that have allowed you to ride easier, farther and harder. Yet, the there are some things that haven't been updated with the rest of these improvements. One of these things is steering trail. 

Trail is one of the dimensions that relates to particular steering feel and handling characteristics. Current trail figures fall between a regular set of parameters depending on wheel size and bike suspension travel. The thing is, this range of trail is based on an old legacy of 26" bikes with outdated geometry; steep head tube angles, shorter reach and top tube, longer stems and skinnier handlebars. 

Why shouldn't this evolve with the rest of your bike?

 

The Tech


FRAME SIZING
Our SBG system utilizes frame reach measurements that are longer than our current models. The SBG system is designed to be used with a 40mm stem, which equates to a modest total increase in reach when compared to our current models which use 50mm stems. Our SBG system additionally includes steeper seat tube angles which aid in climbing traction and reduce seated sag when climbing. These two changes bring the rider more forward in the chassis into a more central location between the front and rear tire contact patches, which greatly increases traction. 

HEAD TUBE ANGLE
SBG integrates slacker headtube angles which allow the fork to absorb impacts better on all angles, and positions the front wheel further forward in relation to the handlebars. As you approach obstacles in the trail a steeper head tube angle has a more vertical suspension path. This reduces the forks ability to properly absorb impacts and generates deflection. A slacker headtube angle positions the fork at a better angle of approach to absorb impacts which reduces deflection. Additionally, slacker headtube angles reduce dive while increasing rear wheel grip under heavy braking. 

FORK OFFSET
SBG is designed to be used with a fork offset that is shorter than traditionally used per wheel size. The shorter fork offset brings the front axle more rearward and under the rider which further increases front tire traction. This works in unison with the shorter stem length to provide a more direct steering input and dramatically enhances connectivity to what is happening with the front wheel. The shorter offset also brings the front wheel more under the rider which balances the effects of a slacker head angle. Our SBG system creates a longer trail figure than standard, used in a way that eliminates the negative side effects. 

SM MD LG XL
REACH 425 450 475 500
STACK 617 617 626 635
EFFECTIVE TT LENGTH 568 593 622 650
SEAT TUBE LENGTH 360 400 440 490
EFFECTIVE ST ANGLE 77.5 76.8 76.3 75.8
HEAD TUBE LENGTH 100 100 110 120
HEAD TUBE ANGLE 64.0 64.0 64.0 64.0
CHAINSTAY LENGTH 435 435 435 435
WHEELBASE 1193 1218 1247 1277
BOTTOM BRACKET DROP 30 30 30 30
ESTIMATED BB HEIGHT 345 345 345 345
STAND OVER HEIGHT 685 695 700 715
FORK OFFSET 43 43 43 43
PARTS & ACCESSORIES

Northwest Bicycle emphasizes fast free shipping, on every order, every time. Most orders will be processed and shipped out in 1-2 business days. As long as all billing, shipping, and payment information is processed correctly, Northwest will keep this 1-2 business day guarantee. Depending on your selected shipping option, all orders will be shipped out accordingly so your order is received on-time. After your order has been shipped you will receive a confirmation email with the tracking number attached. All orders will be sent out USPS or UPS ground depending on shipment size. Please allow for 1-5 business days after the initial 24hr processing time for your order to be delivered. Northwest is not responsible for shipping carrier delays such as mechanical failure, weather issues or incorrect shipping information.

COMPLETE BIKES - LOCAL DELIVERY (SEATTLE)

You now have the option of home delivery on bikes from Northwest Bike if you live in the Puget Sound area. How does it work? It’s simple. Simply shop online through our web store and select local delivery at checkout. We offer Free Local Delivery on bikes $1500.00 and up. All bikes under $1500.00 will have a $25 delivery fee. NO CURRENT MODEL YEAR BIKE WILL BE SHIPPED OUTSIDE OF OUR LOCAL AREA (greater Seattle area).

DO YOU HAVE THE BIKE I WANT IN STOCK?

Our online catalog is comprised of both in stock models and special order models. In stock models will show their respected inventory levels and a delivery time of 1-3 days while special order bikes will show a delivery time of 3-6 business days. We strive to have this information updated regularly on our web store, however if you want to double check inventory before placing your order please contact us at 425.363.2100 and a member of our staff will confirm stock levels for you.

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