iGO’s Core Extreme 3.1 comes as a step-through or step-over. The step-through costs less, despite having the same components.
The Kenda Juggernaut 4.5” tires and 8-speed gearing are above average at this price.
This bike performs well on mixed off-road terrains, say testers.
Experts enjoy the comfortable ride afforded by the fat tires and 75mm RST suspension fork.
According to reviewers, the Core Extreme 3.1 easily reaches and maintains 20mph on flat terrain.
The Core Extreme 3.1 comes with fenders, a rear rack with straps, and lights with brake activation.
In a max pedal assist test, a 150lb tester covers 24.5 miles at 19.1mph on a flat, paved route.
Compared to other 500W fat bikes, the Core Extreme 3.1 performs well on steep climbs using pedal assist.

5 reasons not to buy

The iGO Core Extreme 3.1 is very heavy at 78lb. This complicates lifting, transportation, and riding without assistance.
The bike's total weight capacity of 220lb is very low.
A reviewer says PAS levels 1 to 3 offer minimal assistance, with the power ramping up from level 4.
A reviewer and an owner complain that the fenders rattle.
An expert reports a bit of flex in the step-through frame.

Bottom line

The iGO Core Extreme 3.1 is a fat-tire electric bike with a 500W motor and 576Wh battery. It comes as a step-over or step-through. The comfort, off-road capabilities, and ease of reaching and maintaining 20mph on flat terrain impress. Range and climbing performance don’t stand out. The tires and drivetrain are above average at this price, but the brakes, heavy weight, and low weight capacity disappoint. Additionally, testers complain of weak assistance at low PAS levels and rattling fenders. Overall, the Core Extreme 3.1’s balanced yet unremarkable performance fails to differentiate it in a highly competitive fat-tire category.

By Jordan Grimes

Expert Reviews

88/100 based on 1 rated expert review

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Electric Bike Report

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iGo Core Extreme 3.1ez Review | Sand, Sleet, Snow? No Problem

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Its solid build, comfortable ride, and dependable components make it a contender for bikes that can do a little bit of anything… The bike’s overall weight and the accompanying noise from the accessories might be points of concern for some folks.

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