245 on 8J and 8.5J Rims

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T5R+

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Nov 20, 2010
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Need to refurb my wheels

  • 245/40 x 18 on 8 x 18 Front
  • 264/35 x 18 on 8.5 x 18 Rear
and have the option to run my car on

  • 245/45 x 18 on 8 x 18 Front
  • 245/45 x 18 on 8.5J x 18 Rear
for a couple of weeks whilst mine are away.

Appreciate that the 245/45 are marginally taller and may foul. Appreciate that the speedo will underread ~3% plus wonder if "check tire pressure" will activate.

Anyone know if the 245 are a bad combination with 8.5J rims?
 
Hi

Have not yet undertaken. (Need to find a single 8J x 18 AMG design W212 A207 rim) first.

However web research confirm that 245 wide tyres on a 8.5J (rear rims) will not be an issue.

Suspect that the ride comfort will improve as 45% will give more cushion than 40% (245/40 vs 245/45).
 

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