Differences in sidewall? -

Arktissaloon · 08-07-2008, 11:05 AM

I have 235/40/17 tires all around my car but its time to get 2 new ones. I was checking Discount Tire and a 45series tire is consideribly cheaper. Will it make any difference if the sidewall in the front is 40 and the rear is 45?
Any help would be appreciated.

fretburnr · 08-07-2008, 11:22 AM

taller sidewall = more squish. it should ride nicer (in general, not always) but roll over more on hard turns.

black_box · 08-07-2008, 02:37 PM

don't forget that it will change your gearing and speedometer reading a bit, assuming you're keeping the same tread width (235).

jakeyb · 08-07-2008, 02:44 PM

It will also look like your rolling on meatballs. Too much sidewall looks ridiculous.

fretburnr · 08-07-2008, 02:51 PM

Quote:

Originally Posted by jakeyb

It will also look like your rolling on meatballs. Too much sidewall looks ridiculous.

Lol@meatballs. It does look ridiculous, as does too little sidewall

Arktissaloon · 08-07-2008, 03:26 PM

Quote:

Originally Posted by jakeyb

It will also look like your rolling on meatballs. Too much sidewall looks ridiculous.

Thats what i was thinking, beefy is more for muscle cars. So do you guys think i should dish out the extra $20 or so for a 40mm sidewall?

black_box · 08-07-2008, 03:31 PM

its not 40mm sidewall, its 40% of the tread width = 235 * 0.4 = 94mm. A 235/45 would be a 105.75mm sidewall (23.5mm difference in overall tire diameter)

Arktissaloon · 08-07-2008, 10:25 PM

Quote:

Originally Posted by black_box

its not 40mm sidewall, its 40% of the tread width = 235 * 0.4 = 94mm. A 235/45 would be a 105.75mm sidewall (23.5mm difference in overall tire diameter)

Ok true that makes more sense.

jakeyb · 08-08-2008, 12:06 AM

Yes, it's only 20 bucks. Those tires will be on there for 20k+ mile.

08-07-2008, 11:05 AM	#1 (permalink)
Arktissaloon Learner's permit Join Date: Jul 2003 Location: Naperville Posts: 1,073 Car: 98 328i	Differences in sidewall? I have 235/40/17 tires all around my car but its time to get 2 new ones. I was checking Discount Tire and a 45series tire is consideribly cheaper. Will it make any difference if the sidewall in the front is 40 and the rear is 45? Any help would be appreciated. __________________

08-07-2008, 11:22 AM	#2 (permalink)
fretburnr Heel + Toe Hero Join Date: May 2004 Location: Downers Grove Posts: 1,854 Car: 91 MR2 Turbo Images: 4	taller sidewall = more squish. it should ride nicer (in general, not always) but roll over more on hard turns. __________________ Jay

08-07-2008, 02:44 PM	#4 (permalink)
jakeyb byekaj Join Date: Aug 2004 Location: Purdue Univ./ Aurora, IL Posts: 3,399 Car: E46	It will also look like your rolling on meatballs. Too much sidewall looks ridiculous. __________________ BMX Bike: Sold Mountain Bike: Sold K2 Skates: Sold Stage 3 S4: Sold My excuse for not coming to ETK meets... I have to walk 30 miles to UNO's

08-08-2008, 12:06 AM	#9 (permalink)
jakeyb byekaj Join Date: Aug 2004 Location: Purdue Univ./ Aurora, IL Posts: 3,399 Car: E46	Yes, it's only 20 bucks. Those tires will be on there for 20k+ mile. __________________ BMX Bike: Sold Mountain Bike: Sold K2 Skates: Sold Stage 3 S4: Sold My excuse for not coming to ETK meets... I have to walk 30 miles to UNO's

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08-07-2008, 02:37 PM	#3 (permalink)
black_box deals with engineers... Join Date: Sep 2003 Location: palatine Posts: 4,646 Car: 98 M3 sedan	don't forget that it will change your gearing and speedometer reading a bit, assuming you're keeping the same tread width (235).

08-07-2008, 03:31 PM	#7 (permalink)
black_box deals with engineers... Join Date: Sep 2003 Location: palatine Posts: 4,646 Car: 98 M3 sedan	its not 40mm sidewall, its 40% of the tread width = 235 * 0.4 = 94mm. A 235/45 would be a 105.75mm sidewall (23.5mm difference in overall tire diameter)

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