Shimano Aero BB 4000X vs Shimano 21 Sustain 4000 FJX

Shimano Aero BB

Spinning

39.80 out of 100

Value for money2 out of 5

Quality classLow

Durability3 out of 10

Ergonomics6.03 out of 10

Gear ratio4.7:1

Maximum drag10kg / 22.05lbs

Weight290g / 10.23oz

Line retireve per crank75 centimeter / 29.53 inch

Ball bearings3+1

Technical Specifications

BrandSHIMANO
The main category of the reelSpinning
Price range~ €61.33
Is saltwater resistantNo
Spare spoolNo
Reel size4000
Handle typeSingle handle
Drag typeFront drag
Handle orientationLeft, Right
Line capacity monofilmm/meter: 0.3/180

Shimano 21 Sustain

Spinning

93.60 out of 100

Value for money5 out of 5

Quality classExcellent

Durability9.5 out of 10

Ergonomics6.08 out of 10

Gear ratio5:3:1

Maximum drag11kg / 24.25lbs

Weight275g / 9.7oz

Line retireve per crank87 centimeter / 34.25 inch

Ball bearings9

Technical Specifications

BrandSHIMANO
The main category of the reelSpinning
Price range~ €215.33
Is saltwater resistantYes
Spare spoolNo
Reel size4000 FJ
Handle typeSingle handle
Drag typeFront drag
Handle orientationLeft, Right
Line capacity monofilmm/meter: 180/1.8

Conclusion

Shimano 21 Sustain 4000 FJX clearly outshines Shimano Aero BB 4000X, offering significantly better performance in durability (9.5 out of 10) and total score (9.36 out of 10). While Shimano Aero BB 4000X may be a budget-friendly option. For most anglers, Shimano 21 Sustain 4000 FJX is the kind of reel you can trust when performance matters.

What's the difference between Shimano Aero BB and Shimano 21 Sustain?

Shimano Aero BB 4000X

The reel scores 7 out of 10 (3+1) in bearings, offering smooth performance for regular use with no issues

Shimano 21 Sustain 4000 FJX

Thanks to its 6.33 out of 10 (5:3:1) gear ratio, the reel offers a strong balance between torque and quick retrieval
Saltwater-safe design makes it perfect for spinning conditions.
Exceptional value at €215.33, this reel offers impressive performance for the price, making it a top pick for serious spinning anglers and pros