Staff Bike Checks | Harrison's Transition Sentinel

I got this bike in the late fall to replace my old Trek downcountry rig. Since then, I’ve changed a few things as I’ve figured out what I like or when a new product has come out. I’ve mostly left the bike stock though, as Transition does a fabulous job kitting their complete bikes out.

    Drivetrain duties are handled by a Sram GX groupset with an upgraded X01 shifter. Reliable, durable and inexpensive to replace. I swapped over to OneUp carbon bars for their more compliant ride feel and a longer dropper when I discovered it’d fit. Braking is provided by Sram Code RSC's with 200mm Centerline rotors.

    The biggest changes I’ve made are with the suspension as I’ve swapped the stock Fox setup to Rockshox. My newest upgrade is the 2023 Rockshox Lyrik Ultimate. Compared to my old Fox 36, I find the new Lyrik to be more supple, sensitive, supportive and just stupid easy to set up. In regards to the shock, I chose to install the MegNeg on the Super Deluxe because I was looking for something with more mid stroke support.

    A couple finishing touches are some Jank Components Housing Homies made by my friend Eric Olsen and some VHS tape to replace the chain stay protection.

Total weight with pedals is 35.45lbs.

Frame: Transition Sentinel | Medium

Fork: 2023 Rockshox Lyrik Ultimate | 160mm

Shock: Rockshox Super Deluxe Ultimate w/ MegNeg air can

Crankset: SRAM GX | 170mm

Chainring: SRAM GX | 32t

Derailleur: SRAM GX

Shifter: SRAM XO1

Chain: SRAM GX

Cassette: SRAM GX 10-52

Pedals: Shimano Saint SPD

Hubs: DT-Swiss 370 Rachet LN

Rims: DT-Swiss M 1900

Front Tire: Maxxis Assegai | 29x2.5 | Maxxterra | EXO+

Rear Tire: Maxxis Minion DHR II | 29x2.4 | MaxxTerra | EXO+

Saddle: A well-loved Bontrager Montrose

Seatpost: OneUp Components

Dropper V2 | 210mm

Dropper Lever: Wolf Tooth ReMote

Bars: OneUp Components Carbon

Handlebar - 760mm

Stem: ANVL Swage 40mm

Grips: ODI Elite Pro

Brakes: SRAM Code RSC

Rotors F+R: SRAM Centerline - 200mm


-GroundKeeper Fender

-OneUp Chainguide

-VHS Tape

-Jank Components Housing Homies

Fast Black RockShox Suspension looks killer on the raw alloy Sentinel

Harrison snagged one of the first 2023 RockShox Lyriks' to come throught the shop.

SRAM GX drivetrain (with an XO1 shifter) and Shimano's burly Saint SPD pedals.

A Maxxis Assegai for the front and Minion DHR II in the back (both MaxxTerra/EXO+), OneUp carbon bars cut to 760mm, SRAM Code RSC brakes, and a Wolf Tooth ReMote dropper lever.

OneUp's EDC Pump and a Lezyne side-loading bottle cage, ODI Pro Elite Grips, and a SRAM Code caliper match with 200mm Centerline rotors.

Harrison shredding some premo dirt before he swapped his Fox 36 for the new RockShox Lyrik.

    There it is, another sick Lost Co Staff Build!

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Harrison Winkel



Bellingham, WA

Current Bike: Transition Sentinel

Bike Size: Medium

Favorite Trails: Bobs, Galbraith / Hamilton Buttes, Gifford Pinchot National Forest

About Me: I'm currently our only part-timer at The Lost Co. Coming from America's Dairyland, Wisconsin, I help Adam answer phones and respond to emails. I loves the smell of coffee, watching sunsets, and long rides in the woods. When I'm not here at the shop, I'm either working at Kulshan Brewing slinging beers or exploring new places around the PNW.