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<blockquote data-quote="astroboy" data-source="post: 350778" data-attributes="member: 4527">Specification&nbsp; Sidewall&nbsp; Radius&nbsp; Diameter&nbsp; Circumference&nbsp; &nbsp; Revs/km&nbsp; Difference245/40-18&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 98mm&nbsp;&nbsp; 327mm&nbsp; &nbsp;&nbsp; 653mm&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 2052mm&nbsp; &nbsp; &nbsp; &nbsp; 487&nbsp; &nbsp; &nbsp; &nbsp; 0.0%245/45-18&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 110mm&nbsp;&nbsp; 339mm&nbsp; &nbsp;&nbsp; 678mm&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 2129mm&nbsp; &nbsp; &nbsp; &nbsp; 470&nbsp; &nbsp; &nbsp; &nbsp; 3.8%You should gain 3.8% in top speed.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue&nbsp; &nbsp; :p" loading="lazy" data-shortname=":p" /> but pickup should be slower.. try using a GPS to measure your speed versus the speedo.. :wink:If your E60 N52 continue to max out at 242kph on the speedo, you are actually covering 251.196kph... and can overtake the M5 who&#039;s electronically intervene to max out at 250kph.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" />Time for u to get the M5 emblem.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue&nbsp; &nbsp; :p" loading="lazy" data-shortname=":p" /></blockquote>

[QUOTE="astroboy, post: 350778, member: 4527"] Specification Sidewall Radius Diameter Circumference Revs/km Difference 245/40-18 98mm 327mm 653mm 2052mm 487 0.0% 245/45-18 110mm 339mm 678mm 2129mm 470 3.8% You should gain 3.8% in top speed.. :p but pickup should be slower.. try using a GPS to measure your speed versus the speedo.. :wink: If your E60 N52 continue to max out at 242kph on the speedo, you are actually covering 251.196kph... and can overtake the M5 who's electronically intervene to max out at 250kph.. :D Time for u to get the M5 emblem.. :p [/QUOTE]

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