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

TransitionRegulator SX

Price
€8,999
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"
Weight
18.8 kg

Overview

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)

Transition Regulator SX builds

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.

Transition Regulator SX: FAQ

How much does the Transition Regulator SX cost?

€8,999 depending on the build (Regulator SX Eagle 90 €8,999); RRP Germany (transitionbikes.com EU store), VAT incl..

How much does the Transition Regulator SX weigh?

Claimed weights range from 18.8 kg (Regulator SX Eagle 90) to 18.8 kg (Regulator SX Eagle 90).

What motor and battery does the Transition Regulator SX use?

Bosch Performance Line SX (60 Nm; 600 W peak) with a 400 Wh battery (bosch compacttube; optional 250 wh powermore range extender).

How much travel does the Transition Regulator SX have?

160 mm fork and 150 mm rear travel on mullet 29" / 27.5" wheels.

Other Transition e-bikes

All Transition →