Least you have forgotten what you wrote in your OP I paste it again here for you.
You have a problem. You weigh 20 stones by your own admission.
You want to purchase some new wheels.
My advice to solve your problem was to go on diet to lose the weight and then buy yourself new wheels which would then give you a wider selection as you would be lighter. Also doing this would act as an incentive and give you a reward for when you have reduced your weight.
Quite why you feel then need to be so rude and accuse me of being a troll when I have taken the trouble to reply to your request for advice or other suggestions just shows you have no manners. I don't see your post thanking everyone for their replies.
Touche maybe I should have asked for useful advice, or explained im 6'8 so 20st is about the going rate for a fella my size....
Your advice was not helpful and neither was it intended to be, it was a snide remark that you are trying to back track on....