2018 Transition
SENTINEL NX
A 29″ aluminum frame full suspension enduro bike with upper mid-range components.
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| MSRP | $2,999 |
|---|---|
| Weight | 33.6 lbs |
| Frame | Aluminum |
| Suspension | Full, 140 / 160mm |
| Fork | RockShox Yari RC |
| Shock | RockShox Deluxe |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 11 |
| Groupset | NX, Race Face |
| Brakes | Hydraulic Disc |
| Seatpost | Dropper |
For This Bike
5'0" – 5'7"
5'4" – 6'0"
5'8" – 6'3"
6'0" – 6'7"
🐐 Estimated
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Jul 2019 · Mick Kirkman
The full carbon Transition Sentinel frame looks super slick, and ticks just about every box in the ‘modern geometry’ checklist.
One of a handful of 140mm travel 29ers that are truly Alpine ready
Less urgent and spritely pedalling than plenty similar travel rigs
Dec 2018 · Christoph Bayer
The Transition Sentinel is very similar to the competition in terms of travel and weight. In practice, however, the other bikes were not able to keep up.
Unstoppable on demanding tracks
Very stable at high speed
Great spec
Gets bored on simple trails
Requires an active riding style
On tight climbs, the front wheel tends to want to flop from side to side
Aug 2018 · Mauro Franzi
After our recent test of the Transition Patrol, many readers asked for a comparison with the Sentinel, the Enduro 29er from the American brand. We got ahold of the Sentinel in its top-level, X01 Carbon build, for another test and a head-to-head comparison between the two models. This is therefore going to be a slightly different review, in which we will also compare the two bikes throughout. Despite the different length travel, 160mm at the front and 140mm at the rear for the Sentinel, there are a lot of common aspects, for example the Speed Balanced Geometry and the suspension scheme: a four bar
Aug 2018 · Spencer Johnson
I love to ride heinously steep trails... It’s kind of my thing. So when I heard about Transition Bikes’ new Speed Balanced Geometry (SBG), a platform that supposedly improves upon stability and handling by adjusting crucial angles and the offset of the front wheel, I was immediately excited. The biggest change they made is to what’s called steering trail, or the function of the headtube angle, fork offset and wheel size. While the changes in frame geometry that have been made in the past five years are staggering, steering trail has not changed, and so, according to Transition, “modern” geometry is still being held back by trail. The biggest reason for this is the fork offset, because that would mean not just tweaking a bike’s geometry, but creating a new standard for forks—and that would mean getting giants like RockShox and Fox on board. Somehow, the wizards at Transition managed to do just that, enabling their SBG platform to be brought to the masses. As a rider who seeks out the most aggressive trails that I can find, I’m all ears to any advantages that geometry can provide. With a symphony of updates—including a steeper seat tube angle, longer reach, shorter stem, super slack head tube angle and reduced fork offset—there’s no way this bike could not handle starkly different. The Sentinel was Transition’s first bike with SBG to hit the market, although now their Patrol, Scout and Smuggler have the technology too. As a big bike with big wheels and a good amount of travel (160mm in the front, 140 in the rear) the Sentinel is a bike designed for the exact kind of terrain I like to ride. And, as Transition claims, it’s a bike “designed for 29er skeptics,” meaning with the updated geo it should have maximum maneuverability coupled with unparalleled stability. Well, there’s only one way to find out.
Mar 2018 · bturman Rconroy
Transition's fresh approach to geometry results in a bike that handles incredibly well, encouraging you to get after it that much harder. It's portly but built to last.
Feb 2018 · Scott Prendergast
WELL LISTEN UP KIDS! WE REVIEW A LOT OF BIKES AND FROM TIME TO TIME WE GET ONE THAT’S ALWAYS A BIT OF A SURPRISE. THE TRANSITION SENTINEL IS NO JOKE, AS A MATTER OF FACT WE DON’T WANT TO GIVE THIS BIKE BACK. This rig bleeds as much style as Mick Jagger on the dance floor. A long travel (140mm rear, 160mm front) 29’er is reasonably new for Transitions range, previously they had the Smuggler with 115mm of rear […]
Jan 2018 · Michael Better
Transition offers a Sentinel trail bike in carbon fiber, Wahoo has a forearm-mounted heart rate monitor, and much more.
Dec 2017
Pioneer of long and slack, Transition waves the carbon fiber wand at its long-travel 29er, thus intensifying an already burly performer.
| Frame | Aluminum BB Standard: BSA, 73mm, Threaded |
|---|---|
| Fork | RockShox Yari RC Solo Air 160mm Travel: 160mm Spring Type: Air |
| Shock | RockShox Deluxe RT Travel: 140mm Spring Type: Air |
| Bottom Bracket | 73mm BSA Threaded |
| Headset | FSA No.57E |
| Stem | RaceFace Aeffect R (40mm) |
| Handlebar | RaceFace Chester 35 (780mm x 20mm) |
| Saddle | WTB Volt Comp |
| Seatpost | RaceFace Aeffect Dropper Type: Dropper |
| Pedals | N/A |
| Grips | Velo Single Clamp |
| Rear Derailleur | SRAM NX |
|---|---|
| Front Derailleur | No Support |
| Crank | RaceFace Aeffect (28t, 170mm) |
| Shifters | SRAM NX |
| Cassette | SRAM PG 1130 (11-42t) |
| Chain | SRAM PC 1110 |
| Chain Guide | N/A |
| Brakes | Rear: 180mm Post Mount Type: Hydraulic Disc |
| Brake Levers | SRAM Level T |
| Rims | WTB STPi29 |
|---|---|
| Front Hub | Novatec D711SB & D462SB |
| Rear Hub | Novatec D711SB & D462SB |
| Tires | Maxxis Minion DHF / DHR II 2.3 EXO Dual |
| Disc Rotors | SRAM Centerline (180mm) |
Last updated April 14
Not listed for 2,190 days