assistant: Black toenails usually signal either too much toe-box pressure or excessive forward slide during landing — both are fit issues, not just a cushioning problem. A roomy toe box is the priority here, and you'll want a shoe that locks down the heel well so your foot doesn't migrate forward inside the shoe. Looking at your options, most of the daily trainers in my data run standard in the forefoot, which won't solve your width concern. The **New Balance 1080 v15** is your best bet — it's a well-regarded daily trainer with good lockdown and a smooth transition that should minimize the forward slide that aggravates toenail issues. The 1080 has a reputation for accommodating wider feet better than many trainers, and at 258g it's still reasonably light for a high-cushion shoe. The **Saucony Ride v19** is worth considering as a backup. EDDBUD notes it has a "wider heel" (~5mm wider than prior versions) and an improved fit overall, though the forefoot is still standard width — but the Ride is lighter (255g) and cheaper ($140 vs $170), so if you find the 1080 works, the Ride could be a solid rotation option. I'd skip the **Mizuno Neo Zen v2** for your situation — it's explicitly narrow in the forefoot, which is the opposite of what you need. One follow-up: **Are you a heel striker or midfoot striker?** That'll help me confirm whether the 1080's smooth transition and mild rocker are ideal for you, or if you'd benefit from the Ride's more traditional heel-bevel geometry.