Romatlink Dolphin review

Should you buy one?

Buy the Dolphin if you want a full-suspension, passenger-ready e-bike that folds, and you care more about range than weight. I rode it for several weeks (0:12 to 0:16). It became our daily driver for taking the kids to school (5:54 to 6:03). The 48V 30Ah Samsung battery is the reason to buy it. We rode 25 miles and the display still showed 100% (2:56 to 3:05).

Skip it if you have to lift your bike often, or if you want hydraulic brakes or a torque sensor. It weighs 93 lb (8:15). That’s one of the heaviest bikes I’ve tested (8:19). It has mechanical disc brakes that take a hard squeeze at speed (2:12 to 2:16). The pedal assist uses a cadence sensor, not a torque sensor (7:42 to 7:46).

The deciding factor: the battery. Most rear-hub bikes I test in the $1,000 to $2,000 range have about a 15Ah battery. The Dolphin’s is double that (6:29 to 6:40).

See the Dolphin at Romatlink ($599 listed, down from $1,699, on romatlink.com as of Oct 23, 2026. Code “allelectric” takes $80 off. Affiliate link; it doesn’t cost you any more.)

Quick specs

Source note: times in parentheses are from my review video. Everything marked (Romatlink) is from the Dolphin product page on romatlink.com, checked Oct 23, 2026.

Who it’s for

• Parents doing school runs. The Dolphin comes with a rear seat cushion and a backrest, and my kids loved it (3:57 to 4:03). They’d rather hop on the bike than sit in traffic (5:59 to 6:06).
• Riders who want range over everything. A 1,440Wh battery is huge for a bike in this price range.
• Bumpy routes. With the front fork, two rear shocks and a suspension seat, both the rider and the passenger stay comfortable, even on a gravel trail (9:17 to 9:30).
• People who drive to where they ride. It folds in a few seconds, and in my video it goes in the back of a Model Y with no bike rack (8:45 to 9:03).
• Anyone who hates assembly. You put on the pedals, unfold it, and it’s ready to ride (9:32 to 9:38).

Who should look elsewhere

• Anyone who carries a bike up stairs. At 93 lb, the fold helps with space but not with lifting.
• Riders who want strong, light brakes. The mechanical discs work, but they’re harder to pull than hydraulics (9:12 to 9:17).
• Riders who want smooth, natural pedal assist. A cadence sensor only knows whether you’re pedaling. With a 750W motor, that can cause some lunging (7:46 to 8:03).
• Anyone who wants a polished look. I said the design isn’t that appealing (0:29 to 0:34).

Motor and speed

The 750W rear hub peaks at 1,000W (8:03), and I found the five pedal assist levels pretty zippy (1:38 to 1:40). Romatlink rates it Class 3, with a 25 mph top speed.

What I don’t like is that the throttle is tied to the pedal assist level. In level 1 you get very little throttle. You only get full throttle in level 5 (1:40 to 1:50). The good news is that the throttle works from a stop (2:07 to 2:09). That helps when you have a kid on the back at a light.

Range and battery

This is where the Dolphin stands out. It has a 48V 30Ah pack with Samsung cells (7:12 to 7:18). Most e-bikes have somewhere between 10 and 20Ah (2:50 to 2:56). After 25 miles, my display still read 100% (2:56 to 3:05). Battery displays often read full for a while, so treat that as a sign of a big pack, not a measurement.

Romatlink rates it for 100 miles (6:48 to 6:51). Weight and temperature matter. Near the 350 lb payload limit you probably won’t get 100 miles, but a lighter rider on a nice day may meet or beat it (6:54 to 7:07). When I made the video, the site claimed 80 miles on throttle only. I said even 50 would be a long way (7:22 to 7:35). Romatlink now lists up to 65 miles on throttle. Its own test chart shows 65.56 mi at full throttle with the stock speed limit, and 43.76 mi after unlocking it, with a 160 lb rider on flat ground.

The downside of a big battery is charging. It takes 9 to 10 hours (7:37), so plan to charge overnight.

The battery sits under the seat. You can lift the seat to remove it (4:26 to 4:35). One quirk: the key has to stay in the battery, turned to “run,” for the bike to work. It won’t come out in that position (8:31 to 8:43). Keep a spare key somewhere.

Brakes

The Dolphin uses mechanical disc brakes front and rear (9:07 to 9:12). They stop the bike, but if you’re going fast you have to squeeze hard (2:12 to 2:16). On a 93 lb bike with a passenger, I’d want hydraulics.

Comfort and suspension

This is one of the comfiest bikes I’ve ridden with a passenger. It has a front fork (4:13 to 4:18), and the rear rides on two shocks, one on each side (4:06 to 4:10). The seat post also has a little suspension travel (4:18 to 4:24). The elongated grips are comfortable on long rides (0:45 to 0:49). Since it’s a full-suspension bike, everyone stays comfortable on gravel (9:17 to 9:30).

The weight helps here too. The steel frame, fat tires and big battery make it feel very solid and stable, even with two adults (8:19 to 8:25).

The passenger setup and what I added

The bike comes with a seat cushion and a backrest for the rear rider (3:57 to 4:01). It doesn’t come with anywhere for the passenger to put their feet or hold on (5:23 to 5:31). I added two cheap Amazon parts: a small handlebar that clamps to the seat, and a pair of foot pegs (3:14 to 3:27). Together they cost about $20 (5:37 to 5:42). With a little kid on the back, the handlebar makes a big difference. Without it there isn’t much to hold (3:39 to 3:46).

Romatlink now sells its own passenger handrail ($29) and foot pegs ($39) on romatlink.com (as of Oct 23, 2026). If you’re carrying kids, add both.

Folding

The handlebar folds down, and a second hinge in the frame folds the front half back (2:29 to 2:41). The pedals fold too (4:37 to 4:55). Romatlink lists the folded size as 38.2 x 17.7 x 29.1 in. It fit in the back of my Model Y (8:45 to 9:03), but it still weighs 93 lb when you lift it.

Controls, display and lights

The color display is bright and easy to read in daylight (1:50 to 1:53). The left side has a light button and a loud horn that makes people jump (0:56 to 0:58, 2:18 to 2:27). There’s one odd thing. The display has its own light button, but it only changes the screen. The other button turns the headlight and tail light on and off (1:07 to 1:29). The shifter is a standard thumb shifter that works both up and down with one thumb (1:55 to 2:04). Romatlink also lists a USB-A port and a brake-activated tail light.

Price

When I made the video, the Dolphin was on sale on Romatlink’s site, and I said it was still worth it at that price. I also said the full price was a little high, but that the massive battery explains it (5:46 to 5:54, 6:12 to 6:22). As of Oct 23, 2026, romatlink.com lists it at $599, with $1,699 shown as the regular price. The same page also has an old “Flash Sale $949” banner, so check the price in your cart before you pay.

How it compares

• Lectric XP4: costs more but weighs much less, with about a third of the Dolphin’s battery and front suspension only.
• Rad RadRunner 3 Plus: a utility bike that cost far more as I tested it, with half the battery. It doesn’t fold.

If range and comfort matter more to you than weight and brakes, the Dolphin is the one of these three to look at.

Pros and cons

Pros

• Huge 48V 30Ah Samsung battery, rated up to 100 mi (6:48)
• Full suspension plus a suspension seat post, comfortable for two (9:17)
• Folds, and fits in an SUV (8:45)
• Throttle works from zero (2:07)
• Passenger cushion and backrest included (3:57)
• Almost no assembly (9:32)
• Bright color display and a loud horn (1:50, 2:18)

Cons

• 93 lb (8:15)
• Mechanical disc brakes need a hard squeeze (2:12)
• Cadence sensor, not torque (7:46)
• Throttle power is tied to the assist level (1:40)
• No foot pegs or passenger handle in the box (5:23)
• Key must stay in the battery to ride (8:31)
• 9 to 10 hour charge (7:37)

FAQ

How much does the Romatlink Dolphin cost?

As of Oct 23, 2026, romatlink.com lists it at $599, down from $1,699. It was also on sale when I reviewed it (5:46 to 5:51), so prices move a lot. Check before you buy.

How far does the Dolphin go on a charge?

Romatlink rates it for up to 100 miles on pedal assist and up to 65 on throttle. I rode 25 miles and the display still showed 100% (2:56 to 3:05).

How much does it weigh?

93 lb (8:15). The battery is 16.5 lb of that (Romatlink).

Can it carry a passenger?

Yes. It comes with a rear cushion and backrest, and the total payload is 350 lb (6:57). Add foot pegs and a handle for kids (5:20 to 5:35).

Does it have hydraulic brakes?

No. It has mechanical disc brakes front and rear (9:07 to 9:12).

Is the battery removable?

Yes. Lift the seat to take it out (4:26 to 4:35). The key has to stay in to ride (8:31 to 8:43).

How fast does it go?

Romatlink lists a 25 mph top speed (Class 3).

Check the Dolphin at Romatlink (use code “allelectric” for $80 off; affiliate link, it doesn’t cost you any more) or see it on Amazon.

Related reviews and guides

• Lectric XP4
• Rad RadRunner 3 Plus
• MOD Easy Sidecar
• Bee Cool Adventurer

“You crown the year with your bounty; your wagon tracks overflow with abundance.” Psalm 65:11 (ESV)