New Balance FuelCell Rebel v4 vs v5: Which is Better in 2026?

The FuelCell Rebel series has become a favorite among runners looking for a lightweight, responsive, and versatile shoe, ideal for demanding workouts without the need for a plate. The arrival of the Rebel v5 has generated anticipation: what improvements does it bring, and is it worth leaving the previous version? Let's analyze it in detail.

1. Midsole and cushioning

• Rebel v4: equipped with FuelCell + 20% PEBA, it offered a firm and very responsive foam. Stack of 33.5 mm in the heel and 27.5 mm in the forefoot, with a 6 mm drop. 

• Rebel v5: maintains the FuelCell + 20% PEBA combination, but the foam is softer and more elastic, with a higher profile (35 mm/29 mm, same drop). The transition is smoother, ideal for both intervals and long runs. 

✅ Result: the v5 offers more generous and protective cushioning, with a more comfortable ride at the cost of losing some firmness.

2. Outsole and durability

• V4: partial outsole that exposed part of the foam, less durable. 

• V5: fully covered outsole with more NDurance rubber, better traction and greater wear resistance.

✅ Result: increased durability and safety, although it is still a lightweight trainer (approx. 500–700 km lifespan). 

3. Upper and fit

• V4: very ultralight FantomFit upper, light but less structured.

• V5: still with FantomFit, but more structured in the midfoot, heel, and semi-gusseted tongue for better support. Also available in a "wide" version for wider feet. 

✅ Result: the v5 offers a more secure and comfortable fit, ideal for those seeking confidence in every stride.

4. Weight and profile

• V4: ~219g (men's US9) 

• V5: slightly heavier (225g men's, 180g women's) due to more foam and structure. 

✅ Result: the slight increase does not affect its lightness; both remain in the mixed trainer category.

5. Feel and use in running

• V4: firmer, very responsive and direct, ideal for intervals, fartleks, and fast runs; perhaps less comfortable for long runs.

• V5: offers a more "mixed-daily-trainer" feel: bouncier, comfortable, versatile, capable of both fast paces and daily miles with protection. Some users mention that at very fast paces it can feel somewhat soft. 

✅ Result: the v5 expands its functionality, perfect for those looking for a single shoe for training, intervals, and racing.

6. Target audience

Both maintain a 6 mm drop and a snug fit; the v5 is more comfortable for wide feet (wide version). 

📝 Conclusion

• If you loved the Rebel v4 for its firmness, extreme lightness, and ground contact feel, it is still an excellent option… as long as you tolerate less cushioning.

• If, on the other hand, you value an extra point of comfort, confidence on landing, and a more versatile shoe, the Rebel v5 is a successful evolution that refines the formula without losing the Rebel DNA.

Ready to choose? Get yours now at ADS Running. 🏃
👉 FuelCell Rebel v5 Men
👉 FuelCell Rebel v5 Women