Cooper ST's on a Disco 2

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Originally Posted by BigJon

Changing tyre size won't have any effect on the indicated speed vs RPM equation. The change is downstream of both the RPM sensing (tacho) and speed sensing (speedo) so the relationship between the two won't be altered.

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Ah yep - you're right there BigJon. I should have said "estimated" speed. :bangin:

As every one says with a D2 you are fine at that size of 245/75/R16 ....D1 however is a bit of a squeeze and potential for some steeering stop adjustment. Contrary supplier advice you have got on that size is probably based on your rolling diam change probably exceeding self certified statutory max change to factory (change usualy 15mm in most states) and they worried about liability if they fit them. If you worried get insurance endorsement to that size. For D1's many consider that size is probably the better all round size than factory yet it is around a 35mm increase over factrir rolling diameter.

Well I'm running 265 STs on my D2 and have found no problems - apart from being noisier on the road than my old Dueler 693's were on the Paj. Had the "old" pattern STTs on the Wrangler and they used to "interesting" in the wet, especially on a short wheelbase...but fun! :)
Mike