Bike Review:

Transition Regulator CX

Full Power, Under 50 Pounds, and Ready to Party

E-bikes are evolving fast—and the Transition Regulator CX might be one of the best indicators of where things are headed. While some brands are drifting away from full-power setups or leaning into lighter mid-power models, Transition seems to be bridging the gap. With 85Nm of torque, 600 watts of peak power, a 600Wh battery, and a total weight around 47 pounds, the Regulator CX proves that full-power eMTBs don’t have to be beasts.

Built around the same platform as the new Sentinel, this is a mullet bike with 150mm of rear travel, a 160mm RockShox ZEB fork, and geometry ready to handle big terrain. After a sloppy Pacific Northwest ride full of mud, technical rock, and climbs, here’s how it stacks up.

Geometry:

The Regulator CX shares its bones with the latest Transition Sentinel—meaning it has a stable, composed, and capableplatform. The bike feels upright while climbing but ready to drop in when things turn steep. The short rear end and mullet setup help it stay agile in tighter sections, while the long front center and slack head angle give it confidence at speed and in tech. 

Climbing:

As expected from a full-power e-bike, the Regulator CX climbs fast—especially in Boost mode. Power delivery is strong and smooth, and it’s quieter than most e-bikes I’ve ridden—definitely quieter than the Fazua-equipped bikes. That said, tight switchbacks are still a challenge. Even with power turned down, it’s tough to finesse sharp turns due to that added weight. Traction is great though, and body position feels dialed, just like on the Sentinel.

On this test ride, I logged nearly 5,000 feet of climbing over 17 miles and 2.5 hours—all mostly in Turbo. I started backing off the power with about 20% battery left, but still had some assistance at the end of the ride. A range extender is available if you’re doing big epics, but honestly, most riders won’t need it.

Descending:

This is where the Regulator CX shines. The low-slung weight, Transition’s updated suspension kinematics, and 180mm fork make it a downhill monster—even in the wet. It holds speed through chunk, absorbs impacts smoothly, and remains composed on steeps. I hit a big rock slab that I’d only ridden once before, and despite the sketchy conditions, the bike handled it with ease.

The only downside? Jumping and low-speed tech. That extra weight is noticeable. Compared to something like the Heckler SL or even my 40-pound Marin Alpine Trail, the Regulator CX isn’t as nimble in the air or when popping off smaller features. It bottomed hard on one feature, reminding me that this is still a full-power e-bike.

Who’s This Bike For:

If your crew rides full-power eMTBs and you’re chasing vertical, the Regulator CX is a no-brainer. It’s ideal for riders who value confidence, range, and descending capability over flickability. For those in the PNW or places with steep terrain, the stability and power make it a great tool. If you’re park-focused or looking to replace a full-suspension enduro rig with something motorized, this is a strong contender.

But if you like your bikes playful and light, you might want to wait for the Regulator SX or check out a mid-power build. I’ll be testing that one soon.

Final Thoughts:

The Transition Regulator CX is a standout among the new wave of e-bikes. Full power, under 50 pounds, and trail manners that feel dialed straight out of the gate—it’s a winning formula. The quieter drive system, solid battery life, and downhill confidence all impressed me. It’s not the most playful e-bike I’ve ridden, but it’s one of the most capable.

If you want to go big, climb fast, and shred hard, this bike is made to get up and party down. Keep your eyes on the channel—I’ll be comparing it to the SX version soon, along with other Bosch-powered bikes like the Santa Cruz Vala, Devinci E-Troy Lite, and the Forbidden e-bike with the DJI motor. 

Get your own Regulator from Evo