30-06-2011, 11:28pm
Judging from designation and factory info the 23's will be worse than 21's giving more mileage but less grip due to harder compounds. Really more of a touring than sporting tyre. I guess it depends on what you are after. I have 16's and I am pretty happy with them as well but itching to try the new 3rs's. Cheers
"It is not a shame to not know, the shame is to not know and not to ask"