I drive a Model 3, and neither of the other two bikes in my comparison would fit in its trunk. The Aventon Sinch Step-Through did. It’s a full-size, fat tire e-bike that folds down and fits in the trunk of my car, and that one trick is the whole reason this bike exists (0:40 to 0:59).
I rode it for my three-bike comparison video against the Cyrusher XF900 and the Wallke F1, so this isn’t a long solo review. About three and a half minutes of that video are about the Sinch, and everything I tell you about how it rides comes from those minutes, with time stamps so you can watch each part yourself. Specs I didn’t measure, like weight, range and top speed, come from Aventon’s Sinch Step-Through launch post and owner’s manual.
One thing up front before you get attached: Aventon doesn’t sell this bike anymore. As of Oct 27, 2026, the Sinch Step-Through I tested is gone from aventon.com, and its replacement, the Sinch 2.5, is listed at $1,799 and sold out. My Aventon link above goes to Aventon’s home page, not to a Sinch, because there isn’t a Sinch you can order right now. I’ll point you to bikes you can actually buy further down.
Should you buy one?
If you can find one, the case for the Sinch Step-Through is simple. You want a folding bike that doesn’t ride like a folding bike, and you want it to fit a tall rider. It folded into my trunk, it fit me at 6’1” with room to spare on the seat post (2:42 to 2:59), and the 500W rear motor and 4 inch tires handled dirt trails even though the tread is built for the street (1:53 to 2:24).
The case against it starts with lights. My bike came with no headlight and no tail light (1:11 to 1:26), which surprised me, since Aventon was already putting them on its other bikes. Then there’s the price. I tested it at $1,800, and the fenders and rear rack on my bike cost extra on top of that (0:22 to 0:35). I called that a steep price in the video.
The deciding question is whether you need it to fold. If you have a hitch rack or a truck, the Wallke F1 in the same video gave me the same 500W motor size for roughly $800 to $900 less, by my numbers on camera (10:21 to 10:42).
Why folding mattered so much to me
None of the other two bikes in that video would fit in my trunk, and I said so (0:46 to 0:53). That’s the part I keep coming back to. If you’re like me, with a small sedan and a habit of taking a bike with you, this is the one, because the other two simply won’t fit (1:40 to 1:50).
What makes it more than a commuter folding bike is that it doesn’t feel small once it’s open. I called it a full-size e-bike that’s really comfortable for me to ride (0:53 to 1:00).
Power, tires and how it rode
You still get a ton of power, I said, from the 500W rear hub motor (1:50 to 1:57). Aventon lists a 750W peak. You also get several gears to shift through, which Aventon lists as a 7-speed.
The tires are 4 inches wide, and they’re not meaty. They’re definitely street tires (2:00 to 2:18). Even so, they performed really well both on solid trails and on the dirt trails I took the bike on (2:18 to 2:24). Aventon also lists a front suspension fork with 45mm of travel, which I didn’t test on rough ground.
I also liked the look. I loved Aventon’s new styling, and the dark green with gum sole 4 inch tires just looks really sharp (1:57 to 2:08). That’s a matter of taste, but it’s the one I filmed.
Fit for a tall rider
I’m about 6’1”, and this bike fits me. The seat is Aventon’s own branded seat, fully adjustable, and with it raised to where I’m comfortable there was still plenty of room to go up (2:40 to 2:59). The handlebars adjust too. You undo a clamp and raise them up and down, which I called a really nice feature (3:15 to 3:21).
Controls, throttle and battery
The throttle sits on the left side of the controls, and it works from zero as long as you’re in at least level one of the pedal assist (3:01 to 3:11). In the video you can hear the motor kick on.
The display is full color. It’s the updated display Aventon was rolling out across its bikes, and I said it’s really great (1:00 to 1:09).
The battery is integrated into the frame and comes out with a key, the same as on the original Sinch I tested (2:24 to 2:40). Aventon lists it as 48V 14Ah, which works out to 672Wh, with a range of about 40 miles on average. I didn’t run a range test.
What I didn’t like
The missing lights are the big one. There was no headlight and no tail light on my bike (1:11 to 1:26). I pointed out that my Aventon Soltera came with a headlight and a tail light built into the frame, so I expected lights would come to the Sinch soon (1:26 to 1:38). If you ride at dusk or at night, budget for lights.
The price is the other. At $1,800 plus the fenders and rack, it’s a steep bike (3:21 to 3:30). I still said I believe you’re getting a solid package from a really solid company with Aventon (3:30 to 3:40), and that’s why I thought it was worth it if you need the fold.
Aventon also lists mechanical disc brakes rather than hydraulic ones, and a weight of 68 lb, which is a lot to lift into a trunk. I didn’t weigh it.
What I didn’t test
I didn’t run a range test, a top-speed test or a braking test, and I didn’t weigh the bike or test the suspension on rough ground. Every range, speed and weight number on this page is Aventon’s.
How it compares with bikes I’ve filmed
The two other bikes in the same video are the natural comparison. The Cyrusher XF900 was $2,400 when I tested it, with dual suspension and a 750W motor, but it felt heavy and I wished it had more power (4:18 to 5:40). I said it’s the one for you if 90% of your riding is dirt and gravel, and not the one for the road (7:20 to 7:52). As of Oct 27, 2026, Cyrusher sells the newer XF900 Pro for $1,199, in stock. I haven’t ridden the Pro.
The Wallke F1 is the budget pick from that video. It has the same size 500W motor, and on a smaller frame it felt like it had plenty of power, but I said the handlebars, brakes and seat felt cheap (8:40 to 10:20). Wallke’s own page for it no longer loads, as noted on my F1 review.
Against the Aventon bikes I’ve filmed, the step-over Aventon Sinch is the same folding idea with a different frame. It’s discontinued too. The Rattan LF 750 Pro is a folding fat tire bike I tested with a 750W motor and a passenger seat. Its US page no longer loads, and Rattan now sells the LF Ultra instead.
If you need a folding fat tire bike you can buy today, my best folding fat tire e-bike guide covers the ones in stock.
Who it’s for
The Sinch Step-Through makes the most sense if you drive a small car and want a real bike in the trunk, if you’re tall and tired of folding bikes that don’t fit, and if you want a throttle that works from a stop. It doesn’t make sense if you ride at night and don’t want to add lights, if you’d rather have hydraulic brakes, or if you don’t need it to fold at all.
Pros and cons
Pros: folds into a Model 3 trunk; full-size comfort; fits a 6’1” rider with room to spare; adjustable handlebars; throttle from zero; key-removable battery; full color display.
Cons: no lights on my bike; fenders and rack cost extra; mechanical brakes (Aventon); 68 lb (Aventon); discontinued, and the Sinch 2.5 is sold out.
FAQ
Does it fold small enough for a car?
It folded into the trunk of my Model 3 (0:40 to 0:59).
How far does it go?
Aventon rated it for about 40 miles on average. I didn’t test range.
Is it good for tall riders?
It fit me at 6’1” with plenty of seat post left (2:40 to 2:59).
Can I still buy it?
Not new from Aventon. As of Oct 27, 2026, the Sinch 2.5 is listed at $1,799 and sold out on aventon.com. I haven’t ridden the Sinch 2.5.
Price
I tested it at $1,800, with fenders and the rack extra (0:22 to 0:35). It’s discontinued. As of Oct 27, 2026, the Sinch 2.5 is $1,799 and sold out on aventon.com.
Check Aventon’s current lineup (affiliate link to Aventon’s home page; it doesn’t cost you any more)
For more, see my Sinch ST vs Cyrusher XF900 vs Wallke F1 comparison, my best folding e-bike guide and my Aventon lineup guide.
“By wisdom a house is built, and by understanding it is established;” Proverbs 24:3 (ESV)
