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Euybike S4 Moped-Style Electric Bike vs TST R2 Fat Tire Electric Bike

The Euybike S4 is the better long-distance and comfort pick. It has a much larger battery, a full suspension setup and 20-inch fat tires, so it rides smoother and goes farther on a charge. The TST R2 is quicker off the line, carries more weight and charges faster, but its smaller 16-inch tires and 720 Wh battery make it a shorter-range, firmer ride. Owners of the S4 praise the torque, range and easy assembly, though some report brake issues and a flat tire out of the box.

  • Choose the Euybike S4 if you want the longest range, a plusher ride on rough pavement or light trails, and a bigger-wheeled moped feel.
  • Choose the TST R2 if you want a higher top speed, faster charging and a higher payload rating in a more compact fat-tire package.

Prices

  • Euybike S4 Moped-Style Electric Bike: $447.36 at CuyBike (last seen Nov 9)
  • TST R2 Fat Tire Electric Bike: $459.99 at eBay (last seen Nov 9)
  • Difference: the Euybike S4 Moped-Style Electric Bike is $12.63 cheaper than the TST R2 Fat Tire Electric Bike at the latest prices (Nov 9)
S
S4 Long Range Moped-Style Electric Bike

Euybike S4 Moped-Style Electric Bike

S4 Long Range Moped-Style Electric Bike

4.9(240 ratings)
$447.36at CuyBikeChecked Nov 9
See all prices and details
Visit CuyBike
Pros
  • Long range from a 1200 Wh battery
  • High 96 N·m torque for hills
  • Full suspension and large 20-inch fat tires
  • Shimano 7-speed gearing
  • Owners report easy assembly and strong customer service
Cons
  • Slow 7–8 hour charge
  • Some owners report brake problems and a flat on the first ride
  • Heavier, bulkier moped-style frame
TST
TST R2 16'' 1500W Fat Tire Off road Electric Bike

TST R2 Fat Tire Electric Bike

TST R2 16'' 1500W Fat Tire Off road Electric Bike

$459.99at eBayChecked Nov 9
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • 32 mph top speed
  • Faster 6-hour charging
  • 450 lb payload rating
  • IP54 water resistance
  • Compact 16-inch fat-tire footprint
Cons
  • Smaller 720 Wh battery and shorter range
  • Less torque than the S4
  • 16-inch tires give a firmer, less stable ride
  • No listed suspension detail

What separates them

Euybike S4 Moped-Style Electric BikeTST R2 Fat Tire Electric Bike
Battery energy1200 Wh (48V 25Ah)720 Wh (48V 15Ah)
Estimated rangeAbout 100 milesUp to 65 miles
Top speed28 mph32 mph
Torque96 N·m80 N·m
Suspension and tiresFull suspension, 20" x 4.0" fat tires16" x 4" fat tires
Payload400 lbs450 lbs
Charging time7–8 hours6 hours
Water resistanceIPX4IP54

Price history

  • TST R2 Fat Tire Electric Bike: lowest $599.99 on Nov 9 at Amazon.

Prices at every store

Euybike S4 Moped-Style Electric Bike

  • CuyBikeNew

    In stockReturn policy

    $447.36Checked Nov 9
    Visit CuyBike
  • euybikeNew

    In stockShips from China · duties may applyReturn policy

    $729.00Checked Nov 12
    Visit euybike
All 2 stores and price history →

TST R2 Fat Tire Electric Bike

  • eBayNew

    Availability unknownSold by bonaeb (99% positive, 804 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $459.99Free shippingChecked Nov 9
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $599.99Free shippingChecked Nov 9
    Visit Amazon

Store links may earn us a commission.

All 2 stores and price history →

Specs compared

SpecEuybike S4 Moped-Style Electric BikeTST R2 Fat Tire Electric Bike
Battery Capacity48V 25Ah720Wh
Charging Time7-8 hours6 Hours
Water ResistanceIPX4IP54-Rated Protection
Motor Power1500W—
Battery Energy1200 Wh—
Estimated Range100 Miles—
Payload Capacity400 Lbs—
Gear Shift7 Speed—
Max Motor Torque96N.M—
Pedal Assist Levels5 Levels—
Brake Size180 mm—
Stopping Distance18'-11"—
Show all 21 specsShow fewer specs
SpecEuybike S4 Moped-Style Electric BikeTST R2 Fat Tire Electric Bike
Peak Motor—1500 W
Max Range—65 Miles
Top Speed—32 MPH
Torque—80 N·m
Battery—48V 15Ah
Max Load—450 Lbs
Tires—16" × 4" Fat Tires
Pedal Assist—5 Levels
Weight—69.45lbs/31.5kg

What reviewers say

Euybike S4 Moped-Style Electric Bike

  • 4.9 / 5240 ratings

Owners rate the S4 highly, praising its torque, speed and long battery life for the money. Assembly is described as manageable for a first e-bike, and it handles light trails and passengers well. The main complaints are brake issues and an occasional flat out of the box.

What people mention
  • Torque and speedPraisedRiders say the motor pulls hard up hills and reaches its 28 mph top speed without strain.
  • Battery lifePraisedOwners report long range per charge and are satisfied with how far it goes.
  • AssemblyPraisedBuyers describe setup as straightforward, about an hour even for a first e-bike.
  • BrakesCriticisedSome owners report brakes failing or needing pumping because of air in the rear brake line.

Questions and answers

Which is better for long commutes?
The Euybike S4. Its 1200 Wh battery is rated for about 100 miles against 65 for the TST R2, and its full suspension and larger tires are more comfortable over distance.
Which one is faster?
The TST R2, at a 32 mph top speed versus 28 mph for the S4. The S4 makes up for it with more torque, 96 N·m against 80 N·m.
Which handles hills and heavy riders better?
The S4 has more torque for steep climbs, but the TST R2 carries more weight, 450 lbs against 400 lbs. A heavy rider on very steep hills may prefer the S4's torque.
Which charges faster?
The TST R2 charges in about 6 hours; the S4 takes 7–8 hours. The S4's larger battery is the reason for the longer charge.
Is the S4 worth stepping up to over the TST R2?
Yes if range and ride comfort matter most. The S4 roughly doubles battery capacity and adds full suspension. Pick the TST R2 if you want more speed, faster charging and a higher payload.
Which is better in rain?
The TST R2 has the higher IP54 rating against IPX4 on the S4. Neither is built for submersion, so treat both as splash-resistant only.

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