assistant: Black toenails typically signal either a shoe that's too tight in the forefoot or a fit that lets your foot slide forward on impact — both fixable with a roomy toe box and proper lockdown. Since you have wide feet, you need a shoe that's genuinely spacious up front, not just marked "wide." From your options, **New Balance FuelCell Rebel v5** is your best bet. It's explicitly wide in the forefoot, true to size, and has excellent lockdown to keep your foot anchored so it doesn't drift forward. At 224g it's the lightest here, which also reduces impact stress on the toenails. The 6.0mm drop and 38/32mm stack give you a responsive, modern daily trainer that works for easy runs through speed work — versatile enough that you won't feel locked into one use case. If you want a softer, more cushioned ride, **ASICS Gel-Nimbus v28** is your secondary option. It's the maximum-cushion choice (42/34mm stack), also wide in the forefoot, and the extra padding can reduce repetitive toenail trauma. Believe in the Run notes it's a reliable, comfortable max-cushion shoe — trade-off is it's heavier and less snappy than the Rebel. **Brooks Glycerin GTS v22** is a third option if you lean toward stability. Doctors of Running confirms it's wide in the forefoot and has excellent lockdown, which is exactly what you need. The medial post and guide rails provide mild stability without being overkill for a neutral runner. One caveat: reviewers note the upper starts snug and takes 15–20 miles to break in, so expect a short initial fit before it opens up. The key across all three: wide forefoot + lockdown + true-to-size fit. I'd lean Rebel for versatility and weight, but Gel-Nimbus if maximum cushioning feels better on your feet. Have you had any other fit issues with past shoes — narrow heel, high arch, or anything else — that might steer you toward one of these?