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Transition Sentinel v 3.0 Thread

19K views 150 replies 40 participants last post by  SB666  
#1 · (Edited)
The new Sentinel v3 is officially out.

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  • Wheel Size Options
    29" Wheels SM-XXL and mixed wheel compatible, dual 27.5 on XS.
  • 160mm travel front, 150mm travel rear
    The perfect amount of travel for going up and down mountains. Option to run 160mm rear travel with longer stroke shock.
  • B.O.O.M. BOX
    In frame storage with supplied frame storage bags on carbon models.
  • 64 degree headtube angle
    Send-it-all with confidence and traction.
  • Size specific Chainstays
    As the frame sizes grow, so do the chainstays to keep rider weight balanced on the bike.
  • Increased Size Range (XS-XXL)
    The Sentinel is offered from XS-XXL.
  • Main Pivot Mud Guard
    A pre-installed guard protects the main pivot area, improving the bearing life.
  • Carbon and Aluminum frame options
  • Available in 3 colors
    Choose from Deep Purple, Graphite Grey, and Glacier White.
  • New Cable routing ports
    Ports on the side of the headtube support different cable configurations for electronic or cable shifting while remaining simple for maintenance.
  • Refined Kinematics
    The progressive leverage curve creates a lively nature that leaves plenty of room for big hits while keeping it light on its feet to remain nimble and quick everywhere else.

XS
27.5"
SM
29"/MX
MD
29"/MX
LG
29"/MX
XL
29"/MX
XXL
29"/MX
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A. REACH
415​
430 / 426​
455 / 451​
480 / 476​
505 / 501​
530 / 526​
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B. STACK
592​
615 / 618​
621 / 624​
633 / 636​
642 / 646​
651 / 655​
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C. CARBON EFFECTIVE TT LENGTH
527​
549​
577​
605​
632​
660​
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ALLOY EFFECTIVE TT LENGTH
534​
557​
586​
614​
642​
670​
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D. SEAT TUBE LENGTH
360​
360​
390​
430​
460​
490​
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E. CARBON EFFECTIVE ST ANGLE
79.8°​
79.3° / 78.9°​
78.7° / 78.3°​
78.3° / 77.9°​
77.9° / 77.5°​
77.6° / 77.2°​
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ALLOY EFFECTIVE ST ANGLE
79.2°​
78.7° / 78.2°​
77.9° / 77.5°​
77.3° / 76.9°​
76.8° / 76.4°​
76.5° / 76.2°​
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SADDLE HEIGHT FOR EFFECTIVE ST ANGLE
560​
600​
660​
720​
780​
820​
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CARBON SEAT TUBE OFFSET AT BB
69​
69​
69​
69​
69​
69​
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ALLOY SEAT TUBE OFFSET AT BB
87​
87​
87​
87​
87​
87​
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F. HEAD TUBE LENGTH
100​
100​
110​
120​
130​
140​
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G. HEAD TUBE ANGLE
64°​
64° / 63.6°​
64° / 63.6°​
64° / 63.6°​
64° / 63.6°​
64° / 63.6°​
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H. CARBON CHAINSTAY LENGTH
436​
442 / 440​
442 / 440​
446 / 444​
446 / 444​
446 / 444​
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ALLOY CHAINSTAY LENGTH
434​
442​
442​
446​
446​
446​
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I. CARBON WHEELBASE
1173​
1208​
1237​
1273​
1302​
1332​
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ALLOY WHEELBASE
1171​
1208​
1237​
1271​
1300​
1330​
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J. BOTTOM BRACKET DROP
15​
25 / 11​
25 / 11​
25 / 11​
25 / 11​
25 / 11​
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K. ESTIMATED BB HEIGHT
340​
350 / 344​
350 / 344​
350 / 344​
350 / 344​
350 / 344​

Details here: Transition Bikes
 
#3 ·
Interesting they went steeper with longer chainstays and nice to see both, as the prior version was to me too slack (threw an angleset in to steepen it up 1 degree and help it turn at low speeds). Hopefully they are using paint that is a bit more durable. I have to comment on Transition’s customer service. My friend broke his V2 alloy and had a replacement in 10 days (including the 4th of July in the middle). Transition responded quickly and was incredibly pleasant.
 
#8 · (Edited)
Contrarian take - In frame storage is a big minus. I'm ready for this trend to end.
  • The covers of these storage boxes often rattle on downhills.
  • The contents often rattle too.
  • The amount of storage is quite small in practice.
  • Getting the tools out to make a trail side repair or adjustment is laborious and fiddly.
  • Accommodating the hole requires an increase in frame weight and stiffness, not to mention requiring a larger downtube than is otherwise necessary.
Nice to see the slightly steeper head tube. I still wish Transition would consider glossier paint and more stack.
 
#9 ·
Contrarian take - In frame storage is a big minus. I'm ready for this trend to end.
Couldn't agree more. Just from a pure aesthetics/vanity standpoint, the addition of the internal storage throws off that very slim, angular downtube profile (and definitely contributes to the conspiracy theory about brands attempting to conflate e~bike motors with meat-bike downtubes!). Every bike I've owned with in-frame storage has ended up with mold growing in the compartment, too -- either from lack of weather-proofing or from my own laziness of not drying the compartment out after a wet ride. Give me a sealed downtube any day and I'll happily carry a lightweight hip pack or vest.

Pretty thrilled about the $6kish, Shimano XT/Rockshox Ultimate-level spec on the v3 Sentinel -- I have to applaud that choice. Still a pricey option, but it's about the only trail/all-mountain bike on the market these days that I'd buy as a complete. The wheels leave a bit to be desired -- 370 hubs are better than they used to be, but you'd think Transition would up-spec to something like a 350 EXP or Raceface Vault, ideally -- but any reprieve from the tyranny of GX Transmission is laudable.
 
#12 ·
FWIW, the max rear tire width on the Smuggler is 2.4" and over two years of ownership I've had constant struggle with tire rub on both stays running 2.4" tires from Kenda and Michelin. It got to the point that I actually cut some custom stainless steel plates and mounted them at the wear points with 3M tape to protect the frame.
 
#15 ·
My experience with the rattling is with the Santa Cruz implementation of the idea. I haven’t tried the SWAT box. My attitude is that if you still need to carry a hip bag anyway for your tools etc, the tradeoffs in the frame construction (and potential rattles in the SC case) don’t seen worth it to me. But that’s just me.

I do like the way some brands like Forbidden have implemented frame storage - top tube bottle bosses for a Wolf Tooth bag or other similar solution of the rider’s choice, plus a small cavity underneath the downtube that is really only for storing a spare tube. But I do also own a frame with a Glovebox - I’m just not thrilled with this becoming a mandatory feature.
 
#17 ·
My glovebox never rattled. you might want to talk to SC about it.
Also idk how much stuff youre carrying in a hip pack but i fit an absurd (to me) amount of things in my glovebox. two different tools, tube, co2, patch kit and plug kit, an airtag, an emergency glow stick, zip ties, a masterlink, about ten packs of welch’s gummies, sometimes a light jacket, and a couple granola bars.
 
#34 ·
I can see the temptation! But then I think you'd want a Spur-class bike (Epic 8, Top Fuel, Element, etc.) to bracket the more XC/hard-pedaling end of the quiver. The Smuggler is a nice middle-ground between the XC-ish bike running 900g tires and the modern "all-mountain" bike which, as seat angles get ever-steeper, feels more and more awkward on flat ground.
 
#36 · (Edited)
thanks for your reply, other question, cable port around the Bottomb bracket is really a pain to routing cable and plenty of trail debris
I saw on the sentinel exploded view that they revised this port, seem there is rubber to avoid trail debris
Can you post/link the port image you saw?

Edit: also found this in the PB article: "Cable routing is internal without guides; the hose and cable now pass from the front to the rear triangle near the main pivot via soft plastic trim pieces to protect them from any friction associated with linkage articulation."
 
#38 ·
Glad to hear that it is stiffer (probably stiffer than the spire see it weighs more).

But downer on the rear tire clearance. I am assuming that the chainstays grow due to the pivot location on the main triangle. Maybe it's just them being concerned? I really need true 2.5" clearance.

Any Intel on that front?
 
#44 ·
What Clint misses is that the climbing performance difference between the Sentinel vs. the Spur, is 95% in the drivetrain (i.e. wheels/ tires) and frankly it's like 85% in the tires alone.

I tested this some years back by doing a timed XC loop of my own Spur vs. my SJEvo. Swapping the drivetrains swapped the speeds of these 2 bikes almost perfectly.

The tire clearance issue is a S or M problem because of the shorter CS length. If I rode those sizes I'd go to MX wheels for various reasons, and clearance is one of those reasons.