The 4.10 is a low profile tyre, it would have been comparable to the standard profile 3.50. But a little wider and as I say lower profile.
The 3.60 is a low profile version of the 3.25
Have a look at the Pirelli MT43 (?) tyres, I’ve used this on and off road with no problems
Now let’s all have a beer
68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (undergoing restoration)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)