N54Tech.com - International Turbo Racing Discussion
(#1)
Old
codesx codesx is offline
Senior Member
 
Posts: 643
Join Date: Feb 2018
Car: 2008 335i Vert (E93, N54)
Default Ideal Tire Pressure on Wider than Stock Rim/Tires? - 07-05-2019, 03:06 PM

So, I have X1 322 Rims in my car since I bought it.
I've since installed wider tires on the non-E9x Rims and I'm trying to determine ideal tire pressure. (ideally without slide testing or waiting for inner/outer wear of course)

My car is over 4000lbs empty, being convertible (E93).
Stock wheel/tire sizes have a pressure of 33r/36r. (225f/255r)

Current Rimes and Tires:
Fronts: 8.5", 245/35r18
Rears: 9.0", 275/40r18

I'm guessing at 35f/38r, simply based on wider tires have higher pressure to avoid just wearing on the outsides.

Thoughts / Experience / Facts are all welcome!


----

2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4 Map 6 | RACE BEF | 94 Octane | @19 PSI
BMS: JB4 | BMS WMI @ 60/40 (CM10) | BMS 5" FMIC | BMS OCC | BMS DCI
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
NGK 5992 Plugs @ .020
RB PCV Valve

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & T Stat
Reply With Quote
(#2)
Old
THE BEAST THE BEAST is offline
Senior Member
 
Posts: 937
Join Date: Apr 2016
Car: 2008 E93
Default 07-05-2019, 03:36 PM

I run 42psi in front and 36 psi in rear. 19s on my E93. Front are Pirelli, rear are ToyoR888r. Its not a set thing, some tires allow 50 psi max, others 45, etc. Sidewall strength, hardness of the rubber, etc will all play a part. Should just look up recommended tire pressure for the tire you are running. FWIW , I ran 75 psi front and 48 psi rear on skinny little 155/80/13 on the lowrider, lol
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2018, N54tech.com