Yes you did great, I think must have been independent as don't know of the factory putting them on. Pretty darn quiet considering how aggressive they are. I'm getting a set of 285's and going for it after running the 265s for a few years on my 110. Enjoy them
Please be aware that the OEM MTR's are not available in Australia. The tread pattern on the ones that Goodyear send us here is quite different!
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