I was just going to say something similar
Originally Posted by ricc
I would be surprised if that range of sizes are all options on the exact same van as there will be such a difference in rolling circumference. May also be a clearance thing on the wheelarch (the bigger tyres may go with a raised 4WD option maybe?).
I changed from 195/70R15 to 215/70R15 and my speedo went from overreading (showing higher than actual speed) to underreading by about 2%.
I chose bigger specifically to get higher gearing as the Sprinter/LT Dually is so low geared.
Choice of tyre can depend on miles you plan to do as well of course. so many motorhomes do little miles - if you are one of those, may as well get a high wearing tyre as no point in having a tyres with loads of tread left that you have to change as it is cracking with age.
Camperbus Blog and Website - www.wildebus.com
Electrical Bits - stores.ebay.co.uk/Camper-Van-Kit