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      05-07-2013, 09:51 AM   #1
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United Kingdom

Drives: E90 330d Manual
Join Date: Apr 2013
Location: Westminster, London

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2006 BMW 330d  [0.00]
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235/45 R17 on 8x17 Rim (330d SE)

Hey guys. Do you think that 4 of non-RFT 235/45 R17's over the standard dimension, non-RFT 225/45 R17's would be a good idea for my 330d SE (8x17 rims)?

My aims are a bit more comfort and a bit better traction over the 225's, considering an Evolve remap being on its way (280-300 bhp / 650-700Nm)

Goodyear AS2's are my choice and the per tyre cost difference is small between the sizes.

Also clearance from the ground will be increased, but will the current arches take the slight upsize without undesired rubbing, or require different (larger) spacers?

It's an SE suspension, hence the arch height is not a concern. Also the wider tyre will protect the rim, and it will look a bit sleekier with more filled arches.

Speedo will become closer to actual speed due to the 4.5 mm larger tyre radius. Clearance from the ground will be 4.5 mm higher, a potential plus for city driving over bumps (London), but hopefully won't affect suspension handling much due to the higher centre of mass. Anyway the tyres would have more lateral grip than the SE suspension can handle and the car is mostly used in motorways than bing thushed in B-roads.

Thanks in advance for your comments and ideas!
Alternative proposals are more than welcome

Last edited by ariskar; 05-07-2013 at 09:57 AM. Reason: Adding stuff