The Tektro two-piston HD-T280 hydraulic discs provide strong braking power in testing.
Experts enjoy the gradual and smooth throttle assistance.
Reviewers praise the responsiveness of both the throttle and pedal assist.
A tester maintains high speeds of around 14mph on an 8.2% climb using the throttle.
The low step-through frame is easy to mount and dismount.
Testers find the upright riding position comfortable.
Aventon's Sinch 2.5 comes with fenders, a rear rack (55lb capacity), a headlight, taillights with turn signals, and a USB-C charging port.
The Sinch 2.5 ships fully assembled.
The battery slots into the top of the down tube, making it easier to remove.

12 reasons not to buy

Aventon lists a height range of 4’11” to 6’2”, but a 6’ reviewer requires the max seatpost insertion.
A reviewer measures the folded bike at 46″ x 28″ x 30″, which is bigger than competitors and the advertised dimensions.
The Sinch 2.5 is heavy for a folding e-bike.
Two testers dislike the thin grips.
The taillights don't have brake activation.
The brakes don't have a motor cut-off switch.
The small display is hard to read while riding, according to a tester.
A low water ingress resistance rating of IPX4 means the Sinch 2.5 shouldn’t be ridden in heavy rain.
Attaching pannier bags to the rear rack blocks the taillights.
The Sinch 2.5 doesn't have bottle cage mounts.
A test bike is delivered with a broken suspension fork that requires replacement.
Buyers criticize Aventon’s customer support for being unresponsive, unhelpful, and not honoring warranties.

Bottom line

The Aventon Sinch 2.5 is a folding e-bike with fat tires and a 500W hub motor. Upgrades to this version include a Shimano drivetrain, suspension seatpost, and hydraulic brakes. The smooth throttle power, responsive motor, braking power, and climbing performance impress. The low step-through frame makes it accessible, but riders over 6' probably won't fit. Reviewers complain about the poorly located taillights that lack brake activation. This bike is also heavy for an electric folder, and the folded size is larger than average. The Sinch 2.5 is a big upgrade to the previous version, but the value is questionable considering Aventon's poor after-sales support.

Expert Reviews

87/100 based on 2 rated expert reviews

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Ebike Escape

Level 2 expert

Aventon Sinch 2.5 Review: Major Improvements Over the Sinch.2

Level 2 expert

Its compact folding design and 4″ fat tires make it versatile for city commutes and trails alike. With upgrades like hydraulic brakes and the Shimano drivetrain, the Sinch 2.5 offers an impressive value…

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Scott Hardesty

Level 1 expert

Aventon Sinch 2.5

Level 1 expert

This is one heck of a folding fat-tire bike. This thing is super smooth. I can’t believe how far I rode on this bike with zero battery before I made it here.

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