Kosei K5R 17s max tire width

wcc135i · 02-13-2018, 08:53 PM

I purchased a 135i recently. It has the Dinan Koni set up. I've got some Kosei K5R wheels, they are 17x8 and 17x9. 25mm ET front and 45mm ET rear.

I'm looking to get the Dunlop Direzza ZII star specs for the summer. I know they run wide, but I'm wondering what width I can fit under the fenders. The sticky's say I can run 235, and 265, but I'm guessing that is stock suspension.

What's the max width I can get on these Kosei's with the Dinan Koni suspension?

BimmerAg · 02-14-2018, 09:34 AM

On the rear, a 265 may rub a little over bumps, and a 255 would probably be fine. On the front though, the offset is way off and those wheels will poke out like crazy! I have run 245 on a 17x7.5 ET40 and those poked out a little but didn't rub on stock suspension. You'll likely rub (and maybe even cause fender damage) with ET25 front wheels on a lowered car.

wcc135i · 02-14-2018, 10:35 AM

Quote:

Originally Posted by BimmerAg

On the rear, a 265 may rub a little over bumps, and a 255 would probably be fine. On the front though, the offset is way off and those wheels will poke out like crazy! I have run 245 on a 17x7.5 ET40 and those poked out a little but didn't rub on stock suspension. You'll likely rub (and maybe even cause fender damage) with ET25 front wheels on a lowered car.

So do you think I'll be good with the 235 up front?

I currently have 225 45 and there is plenty of room

BimmerAg · 02-14-2018, 10:40 AM

You have 225/45 tires on 17x8 ET25 front wheels with no rubbing? That's surprising, but if there's rooms with the 225s then 235s should be alright.

wcc135i · 02-14-2018, 05:06 PM

Quote:

Originally Posted by BimmerAg

You have 225/45 tires on 17x8 ET25 front wheels with no rubbing? That's surprising, but if there's rooms with the 225s then 235s should be alright.

No rubbing at all :thumbup:

BimmerAg · 02-15-2018, 10:25 AM

Got any pictures?

wcc135i · 02-15-2018, 10:44 AM

Quote:

Originally Posted by BimmerAg

Got any pictures?

Here you go

The fender pics are the front wheels

BimmerAg · 02-15-2018, 12:47 PM

Looks good! And looks like there's plenty of room for wider tires. 235/40R17 should be fine, and I bet you could get a 245/40R17 in there without too much trouble

wcc135i · 02-15-2018, 04:00 PM

Thanks! I'll give the 235s a try upfront and see how that works. 265 in rear should be good!

wcc135i · 02-15-2018, 04:02 PM

I have the stock M sport wheels for the winter. What kind of 18inch tires should I go with? Unfortunately they will probably be fairly low profile.

wcc135i · 02-16-2018, 10:33 PM

Nevermind. Bent a front kosei today. They aren't in stock on tirerack.

Putting summers on the stock 18s.

02-13-2018, 08:53 PM	#1
wcc135i New Member 2 Rep 21 Posts Drives: 135i N55 Dinan Stg 3 Join Date: Feb 2018 Location: Pittsburgh iTrader: (0)	Kosei K5R 17s max tire width I purchased a 135i recently. It has the Dinan Koni set up. I've got some Kosei K5R wheels, they are 17x8 and 17x9. 25mm ET front and 45mm ET rear. I'm looking to get the Dunlop Direzza ZII star specs for the summer. I know they run wide, but I'm wondering what width I can fit under the fenders. The sticky's say I can run 235, and 265, but I'm guessing that is stock suspension. What's the max width I can get on these Kosei's with the Dinan Koni suspension?
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02-14-2018, 09:34 AM	#2
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	On the rear, a 265 may rub a little over bumps, and a 255 would probably be fine. On the front though, the offset is way off and those wheels will poke out like crazy! I have run 245 on a 17x7.5 ET40 and those poked out a little but didn't rub on stock suspension. You'll likely rub (and maybe even cause fender damage) with ET25 front wheels on a lowered car. __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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02-14-2018, 10:40 AM	#4
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	You have 225/45 tires on 17x8 ET25 front wheels with no rubbing? That's surprising, but if there's rooms with the 225s then 235s should be alright. __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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02-15-2018, 10:25 AM	#6
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	Got any pictures? __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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02-15-2018, 12:47 PM	#8
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	Looks good! And looks like there's plenty of room for wider tires. 235/40R17 should be fine, and I bet you could get a 245/40R17 in there without too much trouble __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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02-15-2018, 04:00 PM	#9
wcc135i New Member 2 Rep 21 Posts Drives: 135i N55 Dinan Stg 3 Join Date: Feb 2018 Location: Pittsburgh iTrader: (0)	Thanks! I'll give the 235s a try upfront and see how that works. 265 in rear should be good!
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02-15-2018, 04:02 PM	#10
wcc135i New Member 2 Rep 21 Posts Drives: 135i N55 Dinan Stg 3 Join Date: Feb 2018 Location: Pittsburgh iTrader: (0)	I have the stock M sport wheels for the winter. What kind of 18inch tires should I go with? Unfortunately they will probably be fairly low profile.
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02-16-2018, 10:33 PM	#11
wcc135i New Member 2 Rep 21 Posts Drives: 135i N55 Dinan Stg 3 Join Date: Feb 2018 Location: Pittsburgh iTrader: (0)	Nevermind. Bent a front kosei today. They aren't in stock on tirerack. Putting summers on the stock 18s.
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