Tyre sizing on all terrains

[dhammalama]

So about to pull the trigger on some steels 17x8 and am looking at tyre options they are recommending 225/65/17 but I'm wondering if its worth getting more of an arch fill and getting 235 as it doesn't affect the speedo greatly according to willtheyfit.com
I've had general grabber at3 and Cooper discover at3 I think they were on my t5 and had zero issues but I think I'll go with discoverer att on the crafter unless as I'm not going to really use the full capability of an off road tyre

 

[Tor]

Al speedo's over read by around 5% so going bigger will not nessesarily cause an issue with that

Mine came with continental 235/65/16 and I now run BFG KO2 225/75/16, the speedo is now bang on the money, I did try running BFG KO2 245/75/16 which made the speedo under read by almost 2MPH, I will add that was not the reason I went down to 225's but something worth consideration. As an aside, you can get the van programmed to any tire size but unless you go silly it probably won't be nessesary.