Transition Regulator CX E-Mountain Bike

Regulators, mount up!

The all-mountain workhorse is here to deliver fun on every trail.

The Regulator CX is our all-mountain workhorse designed to provide a nimble and responsive ride with big power. No trail is too tame or gnarly for the dedicated mixed-wheel platform with 150/160mm travel and geometry that promotes agility and playfulness. The Regulator will be the choice for riders looking for a chassis that excels in a variety of terrain with the added assistance of a Bosch Performance CX drive unit. Known for its legendary reliability, the CX drive unit delivers 85Nm of torque for a powerful and natural ride feel. Enclosed in the downtube is a 600Wh battery to power big rides while remaining sleek and lightweight for the category. For those looking for extra range, the 250Wh Bosch PowerMore range extender will power you up to 850wh for all-day adventures. This combination provides the best range-to-weight ratio for those who value lighter ride characteristics, giving you the best of both worlds with one of the most reliable, powerful, and intuitive motor systems available on the market.

AVAILABLE COLORS:

Clear Black Night

Frostberry

SELECT BUILD

$7,999 USD

$9,499 USD

$10,499 USD

SELECT SIZE/COLOR

Small

Out of Stock

Small

Ships appx: Q3 2026

Medium

Ships appx: Q3 2026

Medium

Ships Now

Large

Ships appx: Q2 2026

Large

Ships Now

X-Large

Ships Now

X-Large

Ships Now

$7,999 USD

IN STOCK: Ships within 2 business days

FREE SHIPPING: We offer free shipping on all bikes and frames, see checkout for additional details.

SHIP TO DEALER: If you prefer picking your bike up from your local authorized Transition Bikes dealer with free professional assembly, please make sure you choose Ship To Dealer during check out.

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PRICE

$7,999 USD

$9,499 USD

$10,499 USD

FRAME

Regulator CX Carbon 150mm

WHEEL SIZE

Mixed

DRIVE UNIT

Bosch Performance Line CX (BDU38)

BATTERY

Bosch PowerTube (600wh)

DISPLAY

Bosch System Controller (USA/Canada)
Bosch Kiox 400c (International)

Bosch Kiox 400c

ASSIST SWITCH

Bosch Wireless Mini Remote

REAR SHOCK

RockShox SuperDeluxe Base
(205x60mm)

RockShox SuperDeluxe Ultimate
(205x60mm)

Fox Float X2 Factory
(205x60mm)

FORK

RockShox Domain Gold RC
(160mm)

RockShox ZEB Ultimate
(160mm)

Fox 38 Factory Grip X2
(160mm)

HEADSET

FSA No.57E

STEM

Race Face Aeffect R (40mm)

Race Face Turbine R (40mm)

HANDLEBAR

Race Face Chester 35
SM(780x20)
MD/LG/XL(780x35)

Race Face Turbine
SM(780x20)
MD(780x40)
LG/XL(800x40)

Race Face Era
SM(780x20)
MD(780x40)
LG/XL(800x40)

GRIPS

ODI Elite Flow Lock-On

SADDLE

SDG Bel Air 3

SDG Bel Air 3 LUX

SEATPOST

SDG Tellis
SM(150mm)
MD(170mm)
LG(200mm)
XL(230mm)

OneUp Dropper Post
SM(150mm)
MD(180mm)
LG(210mm)
XL(240mm)

Fox Transfer Factory
SM(150mm)
MD(180mm)
LG(210mm)
XL(240mm)

BRAKES

SRAM Maven Base

SRAM Maven Silver

TRP EVO Pro

ROTORS

SRAM Centerline (200mm)

TRP R1 2.3 (203mm)

SHIFTER

SRAM Eagle 70 MMX

SRAM Eagle 90 MMX

Shimano XT Di2 SW-M8250-R

DERAILLEUR

SRAM Eagle 70

SRAM Eagle 90

Shimano XT Di2 RD-M8260-SGS

CASSETTE

SRAM XS 1270 (10-52t)

SRAM XS 1275 (10-52t)

Shimano XT CS-M8200 (10-51t)

CHAIN

SRAM Eagle 70

SRAM GX Eagle Transmission

Shimano XT CN-8100

CRANK

Samox EC39
(150mm)

SRAM Eagle 90
(150mm)

E*Thirteen Helix Race
(155mm)

CHAINRING

SRAM T-Type Direct Mount (34t)

SRAM XX T-Type Direct Mount (34t)

E*Thirteen Helix Pro (34t)

CHAINGUIDE

Transition Integrated Top Guide

RIMS

WTB ST i30

DT Swiss H 1900 Spline 30

DT Swiss HX 1700

SPOKES

Pillar Straight Gauge

DT Swiss Hybrid 1

HUBS

Novatech D791SB/D902SB

DT Swiss Hybrid 370

DT Swiss Hybrid 350 Ratchet DEG 60 DF - Anti Kickback

TIRE/FRONT

Maxxis Assegai 3C MaxxGrip EXO+ (2.5)

Schwalbe Magic Mary, Trail, Radial, Ultra Soft (2.5)

TIRE/REAR

Maxxis Minion DHRII 3C MaxxTerra DD (2.4)

Schwalbe Albert, Trail, Radial, Soft (2.5)

INCLUDED

Bosch Charger, Tubeless Valves & Sealant

Bosch Charger, Shimano Di2 Charger, Tubeless Valves & Sealant

COLOR OPTIONS

	Clear Black Night
	Frostberry

	Clear Black Night
	Frostberry

	Clear Black Night
	Frostberry

WEIGHT

TBD

48.1 lbs / 21.84 kg (Size MD)

48.2 lbs / 21.86 kg (Size MD)

Specs are subject to change at any time. All complete bikes are 95% assembled and packaged for quick and easy final assembly, and as such, Transition Bikes is not able to make special request build spec changes or modifications to packaging.

Ride Feel Focus

The dedicated mixed-wheel platform with 150mm rear and 160mm front travel make the Regulator CX nimble and responsive while delivering powerful assistance for the steepest of climbs.The Bosch CX system delivers the highest power-to-weight ratio possible. Perfect for riders who want lighter ride characteristics from their eMTB that excels in a wide variety of terrain.

Bosch Performance CX Motor

Powered by the Bosch CX system, the Regulator gets the legendary reliability of Bosch in a lightweight package giving you 100nm of torque and 600w peak power. While powerful, the system also provides an incredibly natural feel that delivers power without breaking traction, keeping your momentum and helping you clear technical trails.

Bosch 600wh Battery

Enclosed low in the downtube is Bosch's 600wh battery. It's perfectly sized to provide range for big rides without compromising ride characteristics, the 600Wh battery provides the best range-to-weight balance.

Bosch PowerMore Range Extender

Head deep into the backcountry with the additional PowerMore 250wh range extender. Custom cable management keeps the connection clean and secure.

Display

Easily control the power modes and view battery life via the wireless Mini Remote and Bosch Kiosk 400c top tube display. This color display hosts a wealth of information from your bike's settings to stats from the ride.

Bosch Flow App

For those looking to dig into the settings, the Bosch Flow app gives you full control and customization. Once paired with your Regulator, you can adjust the power level support and peak power from the convenience of your phone without any wires or a laptop.

150mm rear, 160mm front travel with mixed wheels

The Regulator is all about making the most of every trail. Easily lay it over in turns, pop off every root, and zip your way back to the top for more. The mixed wheel platform, versatile geometry and 150/160 travel ensure you'll be having fun at all times.

LEVERAGE CURVES

The GiddyUp suspension system is built to deliver great performance without overthinking setup, so you can just grab your bike and ride. It uses a balanced 27% progressive leverage curve with consistent rate change, paired with tuned anti-squat for efficient pedaling and smooth acceleration. Moderate chain growth, which decreases after sag, helps keep suspension active without interference from chain tension.

On trail, this creates a ride that's supple off the top, supportive through the mid-stroke, and ramps up smoothly at the end, working well with both air and coil shocks. A wide 27 to 33% sag range lets riders fine tune the feel from playful to planted, all without needing to fuss with extra adjustments.

FEATURES

CLEAN CABLE ROUTING

Cable routing ports are compatible with 0, 1, or 2 cables and allow brakes to be run on either side.

CHARGE PORT

Our custom charge port door uses magnets to ensure it stays closed on even the rowdiest of descents.

INTERGRATED PROTECTION

While a preinstalled Loam Hat keeps dirt and debris away from your main pivot bearings.

INTEGRATED CHAINGUIDE

The sleek and effective top guide keeps the chain in place while being easy to open for maintenance.

"The Regulator CX covers that broad range of demands better than anything else I've ridden and does so with ride characteristics that are shockingly close to a regular mountain bike while doing so in a freakishly quiet manner. I'm past due for a new e-bike and this just might be the one." - Ian Collins MTB Mag

FULL REVIEW

"E-bikes are evolving rapidly, and the Regulator CX is a prime example. The weight is very reasonable, the motor is smooth and quiet, and there's plenty of power for quickly zipping up steep climbs. It may not be the flashiest option on the market, but bells and whistles (or idler pulleys and high pivots) aren't necessary to create a bike that's tons of fun to ride just about anywhere." - Mike Kazimer Pinkbike

FULL REVIEW

"The Regulator, in SX or CX trim, is an exceptionally fun and versatile ripper that rides less like an e-bike and more like a traditional mountain bike." - Shawn Spomer Vital MTB

FULL REVIEW

"Both versions prioritize handling and playful, natural ride quality over pure plow-and-smash capability. That said, these bikes are still very capableâ€”you could take them just about anywhere and have a good time." - Conor Barry Bikers Edge

FULL REVIEW

MTB MAG PINKBIKE VITAL MTB BIKERS EDGE

"The Regulator, in SX or CX trim, is an exceptionally fun and versatile ripper that rides less like an e-bike and more like a traditional mountain bike." - Shawn Spomer Vital MTB

FULL REVIEW

MTB MAG PINKBIKE VITAL MTB BIKERS EDGE

"The Regulator, in SX or CX trim, is an exceptionally fun and versatile ripper that rides less like an e-bike and more like a traditional mountain bike." - Shawn Spomer Vital MTB

FULL REVIEW

MTB MAG PINKBIKE VITAL MTB BIKERS EDGE

Speed Balanced Geometry
	SM	MD	LG	XL
	HIGH/LOW	HIGH/LOW	HIGH/LOW	HIGH/LOW
A.REACH	425/420	455/450	480/475	510/505

B.STACK	623/628	632/637	641/646	651/656

C.EFFECTIVE TOPTUBE LENGTH	551/554	583/587	610/615	643/648

D.SEATTUBE LENGTH	375	400	440	470

E.EFFECTIVE SEATTUBE ANGLE	78.8/78.3	78.5/78.0	78.2/77.7	77.9/77.4

SADDLE HEIGHT FOR EFFECTIVE SEATTUBE ANGLE	600	660	720	780

ACTUAL SEATTUBE ANGLE	75/74.5	75/74.5	75/74.5	75/74.5

SEATTUBE OFFSET AT BOTTOM BRACKET	41	41	41	41

F.HEADTUBE LENGTH	105	115	125	135

G.HEADTUBE ANGLE	64.5/64.0	64.5/64.0	64.5/64.0	64.5/64.0

H.CHAINSTAY LENGTH	442/444	442/444	448/450	448/450

I.WHEELBASE	1201/1203	1235/1237	1271/1273	1305/1307

J.BOTTOM BRACKET DROP (FRONT)	20/25	20/25	20/25	20/25

J.BOTTOM BRACKET DROP (REAR)	0/5	0/5	0/5	0/5

K.ESTIMATED BOTTOM BRACKET HEIGHT	350/345	350/345	350/345	350/345

GENERAL SPECS
FRAME MATERIAL:	Carbon

WHEEL SIZE:	29" Front / 27.5" Rear

SIZES:	SM, MD, LG, XL

COMPONENT COMPATIBILITY
FORK OFFSET:	44mm

FORK AXLE-TO-CROWN:	579mm

HEADSET (TOP):	44mm Zero Stack

HEADSET (BOTTOM):	56mm Zero Stack

CHAINLINE:	55mm

REAR BRAKE MOUNT:	180mm Post Mount, Max Rotor Size 223mm

REAR AXLE:	Transition Axle For UDH, 12mm x 148mm Spacing

SEAT CLAMP:	37.0mm

SEATPOST DIAMETER:	31.6mm

SEATPOST INSERTION DEPTH:	Small 235mm \| Medium 260mm \| Large 300mm \| X-Large 330mm

TIRE MAXIMUM:	27.5” x 2.6" (*see FAQ)

SUSPENSION SPECS
FRONT TRAVEL:	160mm

REAR TRAVEL:	150mm (Compatible with 160mm)

SHOCK SIZE:	205mm x 60mm (compatible with 205 x 65mm)

SHOCK HARDWARE:	Trunnion Mount Top / 30mm x 8mm Bottom

SAG SETUP:	150mm/60mm: 16-20mm (26-32%)

BEARINGS:	2x 6903, 2x 6902, 6x 6802, 2x 6900

EBIKE SPECIFIC SPECS
DRIVE UNIT:	Bosch Performance Line CX (BDU38)

BATTERY:	Bosch PowerTube (600wh)

DISPLAY:	See Specification Chart above

CONTROLLER:	Bosch Wireless Mini Remote

RANGE EXTENDER:	Compatible with Bosch PowerMore 250wh Range Extender (See FAQs Below)

OVERVIEW/BUY

BUILD SPECS

FEATURES

SBG GEOMETRY

REVIEWS

FRAME SPECS

FAQ'S

SUPPORT/SETUP

Ride Feel Focus

Bosch Performance CX Motor

Bosch 600wh Battery

Bosch PowerMore Range Extender

Display

Bosch Flow App

150mm rear, 160mm front travel with mixed wheels

LEVERAGE CURVES

Ride Feel Focus

Bosch Performance CX Motor

Bosch 600wh Battery

Bosch PowerMore Range Extender

Display

Bosch Flow App

150mm rear, 160mm front travel with mixed wheels

LEVERAGE CURVES

CLEAN CABLE ROUTING

CHARGE PORT

INTERGRATED PROTECTION

INTEGRATED CHAINGUIDE

Transition Regulator CX Carbon e-Mountain Bike

Ride Feel Focus

Bosch Performance CX Motor

Bosch 600wh Battery

Bosch PowerMore Range Extender

Display

Bosch Flow App

150mm rear, 160mm front travel with mixed wheels

LEVERAGE CURVES

Ride Feel Focus

Bosch Performance CX Motor

Bosch 600wh Battery

Bosch PowerMore Range Extender

Display

Bosch Flow App

150mm rear, 160mm front travel with mixed wheels

LEVERAGE CURVES

CLEAN CABLE ROUTING

CHARGE PORT

INTERGRATED PROTECTION

INTEGRATED CHAINGUIDE