Transition Regulator SX Eagle 90 e-MTB, side view
Photo: Transition
Lightweight eMTBAll-mountain2026
Regulator SX range · 1 build

TransitionRegulator SX Eagle 90

€8,999RRP Germany (transitionbikes.com EU store), VAT incl.
Motor
Bosch Performance Line SX60 Nm; 600 W peak
Battery
400 WhBosch CompactTube; optional 250 Wh PowerMore range extender
Travel F / R
160 / 150 mm
Wheels
Mullet 29" / 27.5"
Frame
Carbon
Weight
18.8 kgManufacturer figure (size M)

All Bosch Performance Line SX eMTBs →

Overview

The Transition Regulator SX Eagle 90 (€8,999) is the only build of the Regulator SX: Bosch Performance Line SX with 400 Wh, RockShox Lyrik Ultimate fork, RockShox SuperDeluxe Ultimate shock, SRAM Eagle 90 and SRAM Maven Silver brakes. Claimed weight is 18.78 kg.

The Regulator SX is the lightweight version of Transition's carbon all-mountain Regulator: same mixed-wheel chassis with 150 mm of GiddyUp rear travel, a 160 mm fork and a High/Low flip chip.

It runs the Bosch Performance Line SX motor (60 Nm, 600 W peak) with a 400 Wh CompactTube battery; the optional 250 Wh PowerMore range extender raises capacity to 650 Wh. The single Eagle 90 build weighs a claimed 18.78 kg (size MD).

  • Bosch Performance Line SX: 60 Nm, 600 W peak
  • 400 Wh battery, 650 Wh with PowerMore extender
  • 150 mm rear / 160 mm fork, mixed wheels
  • Claimed 18.78 kg (size MD)

Gallery

Photos: Transition

Full specifications

Frame & suspension

Frame
Regulator SX Carbon 150mm
Wheel size
Mixed
Rear shock
RockShox SuperDeluxe Ultimate (205x60mm)
Fork
RockShox Lyrik Ultimate (160mm)
Headset
FSA No.57E

E-system

Motor
Bosch Performance Line SX (BDU31)
Battery
Bosch CompactTube (400wh)
Display
Bosch Kiox 400C
Remote
Bosch Wireless Mini Remote

Drivetrain

Shifter
SRAM Eagle 90 MMX
Rear derailleur
SRAM Eagle 90
Cassette
SRAM XS 1275 (10-52t)
Chain
SRAM GX Eagle Transmission
Crankset
RaceFace ERA Carbon E-MTB (160mm)
Chainring
SRAM XX T-Type Direct Mount (32t)
Chainguide
Transition Integrated Top Guide

Brakes

Brakes
SRAM Maven Silver
Rotors
SRAM Centerline (200/180mm)

Wheels & tyres

Rims
DT Swiss XM 1700 Spline 30
Spokes
DT Swiss Competition Race
Hubs
DT Swiss 350 Ratchet DEG 72 DF - Anti Kickback
Front tyre
Maxxis Assegai 3C MaxxGrip EXO+ (2.5)
Rear tyre
Maxxis Minion DHRII 3C MaxxTerra EXO+ (2.4)

Cockpit

Stem
Race Face Aeffect R (40mm)
Handlebar
Race Face Era SM(780x20) MD(780x40) LG/XL(800x40)
Grips
ODI Elite Flow Lock-On
Saddle
SDG Bel Air 3 LUX
Seatpost
OneUp Dropper Post SM(150mm) MD(180mm) LG(210mm) XL(240mm)

Other

Included
Bosch Charger, Tubeless Valves & Sealant
Weight
41.4 lbs / 18.78 kg (Size MD)

Manufacturer specification — source. Specs and prices can change; check with the brand or your dealer.

Regulator SX geometry

SizeSMLXL
AReach425 mm455 mm480 mm510 mm
BStack623 mm632 mm641 mm651 mm
CEffective Top Tube Length551 mm583 mm610 mm643 mm
DSeat Tube Length375 mm400 mm440 mm470 mm
EEffective Seat Tube Angle78.8°78.5°78.2°77.9°
Saddle Height For Effective Seat Tube Angle600°660°720°780°
Actual Seat Tube Angle75°75°75°75°
Seat Tube Offset At Bottom Bracket41 mm41 mm41 mm41 mm
FHead Tube Length105 mm115 mm125 mm135 mm
GHead Tube Angle64.5°64.5°64.5°64.5°
HChainstay Length442 mm442 mm448 mm448 mm
IWheelbase1201 mm1235 mm1271 mm1305 mm
JBottom Bracket Drop (Front)25 mm25 mm25 mm25 mm
JBottom Bracket Drop (Rear)5 mm5 mm5 mm5 mm
KEstimated Bottom Bracket Height350 mm350 mm350 mm350 mm

Where two values are given: High / Low flip-chip position. Source: Transition.

Regulator SX Eagle 90: FAQ

How much does the Transition Regulator SX Eagle 90 cost?

€8,999 (RRP Germany (transitionbikes.com EU store), VAT incl.). Prices vary by country and dealer.

How much does the Transition Regulator SX Eagle 90 weigh?

Transition quotes 18.8 kg.

What motor and battery does the Transition Regulator SX Eagle 90 have?

Bosch Performance Line SX (60 Nm; 600 W peak). 400 Wh battery — bosch CompactTube; optional 250 Wh PowerMore range extender.

How much suspension travel does the Transition Regulator SX Eagle 90 have?

160 mm at the fork and 150 mm at the rear, on mullet 29" / 27.5" wheels.

What sizes does the Transition Regulator SX Eagle 90 come in?

S, M, L, XL. Check the geometry table to compare reach and stack between sizes.

More Transition e-bikes

All Transition →