Autumn 2025 saw the release of the Inov8 Mudtalon Speed V2 fell running shoes.
I’ve had a pair of Inov8 Mudtalon Speed fell running shoes for around 18 months and have used them for racing and training in wet and muddy conditions so I was interested to take a look at the updated version when they were released in October 2025. A very wet couple of months gave me a chance to test them out in the Peak District in conditions that they were designed for.

Inov8 Mudtalon Speed V2
Features – What’s new with version 2?
Visually there is very little difference between the original and version 2; the same lightweight upper material, the same aggressive sole with 8mm lugs and the wider toe box to allow the toes to splay out. As before the shoes are available in two width fittings – Precision and Wide (I chose the narrower option) and the shoes come with the Boomerang cushioned footbed. The stack height is 11mm heel to 7mm midfoot giving a racy 4mm drop.

6mm drop on the Mudtalon (left) 4mm drop on the Mudtalon Speed
As with the original version the Mudtalon Speed V2 are a very flexible shoe (I found this to be the main difference between the Mudtalon Speed and the Mudtalon which are noticeably stiffer – see video at the end for a comparison). The low drop and high ground feel result in a shoe that is great for fast running over uneven terrain.

a very flexible shoe
The main upgrades on the V2 are:
Better drainage with each shoe having 4 drainage holes in the upper, which allows water to escape very quickly reducing that feeling of running with lead boots immediately after crossing a stream! Not that the original version were slow draining, the upper material allows water to drain freely.

drain holes in the uppers
The uppers now have a stripped down tongue with less padding than previously, which makes it a little less comfortable but less prone to soaking up water. Also the shape of the upper at the midfoot is slightly different (It took me a while to notice the difference!) which is supposedly to improve the “lockdown” when the laces are tightened.

spot the difference? V2 red V1 yellow
The STICKYGRIP™ rubber outsole now has an updated formula that is now said to offer a 36% improvement in grip in wet conditions. Details of the testing can be seen here: SATRA lab test: https://new.satra.com/markets/footwear/
I can’t honestly say that I noticed any improvement in grip when running on wet rock compared to the original version, they aren’t bad and I managed a few “leaps of faith” without falling over! However I haven’t found any shoe where you don’t need to exercise a bit of caution when running quickly over smooth wet or lichen covered rock!

leap of faith – the wet rock test!
The midsole uses a Powerflow foam that is slightly firmer and thus more hardwearing than on the version 1, again I couldn’t really tell the difference (although my version 1 have now done 700km so it isn’t possible to compare like for like). I know some runners who had the original version and didn’t get much use out of them before the upper material began to fail. Personally I didn’t experience that, I’ve done 800km and there is still plenty of life left in them. As always it will be interesting to see how the new version stand up to the rigors of use in harsh conditions.
When would I use these shoes?
Like their predecessors the Mudtalon Speed V2 are a low drop, flexible, lightweight fell running shoe. They are fast draining and give excellent grip in mud, on wet grass and on steep fell terrain. I see them as a shoe for short, fast races in wet conditions and for faster training sessions on technical terrain. For winter training and for longer, slower races or challenges such as the Bob Graham Round I’d opt for the plain Mudtalons (not the Mudtalon Speed) which are stiffer, have a 6mm drop, more padding and slightly more cushioning (see video comparison). Inov8 also offer a Mudtalon Zero which as the name implies has no differential between midfoot and heel height.

designed for these conditions
Technical info:
Weight average 260g (220g on my scales for my size 6.5). Drop 4mm. Lug depth 8mm.
Sole – STICKYGRIP™, Boomerang footbed. Two widths; Precision Fit & Wide Fit.
Vegan friendly!
RRP – £130
Available on the Inov8 website: Link to Inov8 website
Video comparing the Mudtalon and Mudtalon Speed V2

















































