assistant: Black toenails usually signal either a too-tight toe box or excessive forward slide in the heel during braking—or both. Since you have wide feet, a roomy forefoot is non-negotiable. The good news: several of these trainers are explicitly wide-friendly. Before I narrow it down, one quick question: **Do your current shoes feel tight in the toe box, or do you feel like your foot is sliding forward inside the shoe?** That'll help me steer you toward either a roomier last or one with better lockdown to prevent drift. In the meantime, here are three strong candidates—all with wide forefeet and high cushioning for protection: **New Balance FuelCell Rebel v5** — Lightest of the group (224g), wide forefoot, neutral ride, and versatile enough for daily training through long runs. Run Moore calls it "plush and flowy" with a better fit for most runners. **ASICS Gel-Nimbus v28** — Maximum cushion (42/34mm stack) with a wide forefoot and smooth rocker that reduces jarring. Recovery-focused, so it'll be forgiving on easy days. Believe in the Run notes it's a reliable, comfortable max-cushion option. **Brooks Glycerin GTS v22** — Wide version available, excellent lockdown (critical for preventing toe-box slide), and mild stability if you tend toward overpronation. Doctors of Running praises its secure fit and firmer midsole—less mushy than the previous version. Which of these resonates, and does the toe-box tightness or forward slide feel more familiar?