Which Trek E-Bikes Assist to 28 mph, and Which Stop at 20?

Summary

Trek's pages list pedal assist to 28 mph on the FX+ 7S, the Verve+ 4S and the Allant+, and to 20 mph on the Verve+ 1, 2 and 3, the Dual Sport+ and the Powerfly+ mountain bikes. The throttle-equipped FX+ 1 and FX+ 2 are listed as "Class 2 or Class 2/3 Hybrid," so the model and version decide the speed, and the family name alone does not. Some model-year 2026 FX+ 1 bikes are also under a CPSC recall for rear-wheel bolts.

Speed by model, as Trek lists it

Trek's FAQ explains the split. "The e-assist will shut off at either 20mph (25kph in Europe) or 28mph, depending on the model and where it is being sold," and it defines a Class 3 bike as one that "ceases to provide assistance when the bicycle reaches 28 mph." The Verve+ 4S spec line reads "Up to 28 miles," while the text above it gives 28 mph.

The "S" is the pattern in the city bikes. The FX+ 7S and the Verve+ 4S are the 28 mph versions, and the Allant+ assists to 28 mph across the family. For a path or trail that allows Class 1 or Class 2 only, those are the models to rule out.

Weight and battery pull the other way

The fastest FX+ is also the lightest bike on the list. Trek calls the FX+ 7S "a premium lightweight city e-bike" and lists it at about 40 lb with a 360Wh battery, up to 50 miles, and up to 75 with a range extender. The Verve+ 3 weighs 58.63 lb with a 545Wh battery and assists to 20 mph.

The Verve+ is the comfort family, which Trek describes as having an "upright riding position," with "lowstep frame options for easy on and off" on select models. Trek says the Verve+ 2, 3 and 4S "are powered by Bosch mid-drive motors."

The Allant+ is the long-distance commuter. Trek describes it as "perfect for speedy commutes, sweat-free errands, and off-road adventures," with up to 90 miles per charge.

Powerfly+ and Rail+ on the trail

The Powerfly+ uses a Bosch Performance Line CX motor with up to 120 Nm, a 600Wh battery with an 800Wh upgrade, and hardtail or full-suspension frames. The full-suspension version has 130 mm of travel up front and 120 mm at the rear on 29-inch wheels (27.5 on the smallest size). Trek's FAQ calls Powerfly "Trek's e-MTB with the least amount of travel." Older Powerfly+ builds used an 85 Nm motor and a battery of up to 625Wh, which matters when reading a used listing.

The Rail+ is the other end of the range. Trek's e-bike comparison describes it as a "long-travel, high-power electric enduro bike," and its shop page describes Rail+ bikes as "built for range, speed and control on rugged terrain." Between the two sit the Fuel+, described as a "mid-power e-MTB," and the Slash+, a "mid-assist enduro e-MTB."

The FX+ 1 rear-bolt recall

CPSC announced the recall on January 29, 2026 (No. 26-220). It covers rear-wheel bolts on model-year 2026 Trek FX+ 1 Midstep, FX+ 1S Midstep, FX+ 1 Stepover and FX+ 1S Stepover bikes, and on Electra Townie Go! Step Thru and Townie Go! S Step Thru bikes, sold before October 28, 2025. About 19,890 units were sold at Trek stores and retailers from April 2025 through October 2025 for about $2,100.

According to the notice, the bolts "can break when torqued, causing the wheel to separate from the bicycle." Trek had received seven reports of broken bolts and no injuries. CPSC tells owners to stop using the bikes and contact an authorized Trek or Electra dealer, who replaces the black rear-wheel bolts with silver ones at no charge.

Sources

• Trek: FX+
• Trek: Verve+
• Trek: Allant+
• Trek: Dual Sport+
• Trek: Powerfly+
• Trek: E-bike FAQ
• Trek: Compare Trek ebikes
• Trek: Rail+
• U.S. Consumer Product Safety Commission: Rear Bolts on Trek and Electra Electric Bicycles Recalled Due to Fall Hazard