Cloudultra 2

I ran in both the Cloudultra 1 and 2 (3 is on the way, already big discounts). I love these shoes for everything that's not wet conditions. I find the grip to be lacking (but the Cloudultra 3 has another outsole and it looks better).

I switched from the lone peaks for probably 6-8 years after a bout of planter fasciitis. Pt recommended On clouds. I have been in the could ultra 2 and 3 with no issues. I also tore my Achilles while on Team Altra but never correlated the two.

On does make some solid trail shoes, but they tend to work best for mixed or moderate trails rather than really technical terrain. Models like the Cloudultra are designed more for long-distance trail running and ultra efforts. They’re known for being comfortable and breathable, and they handle gravel, dirt, and rocky trails fairly well with good grip and stability. But they aren't always ideal for very technical mountain trails. If you like the feel of your On road shoes, the Cloudultra or Cloudventure are probably the closest trail equivalents.

Achilles issues often come from sudden elevation changes more than the shoe itself. At 90kg, I'd look into two things: 1) calf eccentric exercises (heel drops off a step, slowly lowering) — they seriously help strengthen the achilles tendon, and 2) maybe try a shoe with a slightly higher drop temporarily while you recover. The Cloudultra sits around 7mm drop iirc, so going to something like 10-12mm could take some strain off while you build strength back up. Don't push through achilles pain though, that tendon doesn't heal fast.

I’ve been loving the On Cloudultras I moved initially from the speedgoats to the Brooks Catamounts though.

I had the cloud ultras trail running shoes and enjoyed them. I then started bumping my mileage up to 30-50ish miles a week so switched to the SG's to get more cushion. Never had a problem with rocks getting stuck tho.

Cloudultras are good but they don't have very robust grip do they? I've used for flat / sandy / dry trails but wouldn't think of taking onto anything rocky.