assistant: Black toenails usually signal either too-tight a toe box or excessive downhill impact — and with wide feet, fit is your first lever. You need a shoe with a genuinely roomy forefoot and enough cushioning to absorb impact without cramping your toes. I'm seeing three strong candidates in your data, all with wide forefoot fits and well-documented roomy toe boxes: **New Balance FuelCell Rebel v5** — The Run Testers calls it "one of the best New Balance shoes" they've tested in over a year, and specifically notes a "roomy toe box" with "good clearance" and "no heel slipping." It's a versatile daily trainer at $145 with high cushioning (38/32mm stack), a wide platform for stability, and a smooth ride that handles everything from easy runs to tempo work. The Run Testers emphasize it's "true to size" — trust that sizing. **New Balance 880 v15** — Also true-to-size with a wide forefoot, and at $140 it's the budget winner. Doctors of Running praises its "excellent stability" and "pronounced rocker geometry," which means less late-stage foot torque — a real advantage if downhill running is part of your black-toenail issue. Slightly heavier and firmer than the Rebel, so it leans recovery/easy-run, but it's a solid daily trainer. **ASICS Gel-Nimbus v28** — If you want maximum cushioning for impact absorption, this is it: 42/34mm stack (the tallest here), true-to-size fit, and a wide forefoot. It's technically categorized as easy-recovery, but runners use it for daily training and long runs too. At $170 it's the priciest option, but the extra stack and rocker geometry could help if impact is your main concern. **Quick question:** Are you doing a lot of downhill running, or is the black toenail more about general fit pressure in the toe box? That'll help me confirm which of these three is the best fit.