09-27-2022, 07:52 PM | #1 |
New Member
0
Rep 11
Posts |
M240ix pot hole wheel size setup
I am coming off owning for 5.5yrs a Golf R where I went from the 19 stock to 18in to then 17in all with the goal of trying to get better pothole protection. Unfortunately even with the 17s it wasn't enough
I was hoping to get some advice of a setup that would offer good protection from potholes for a 2021 M240ix. Tirerack is showing the most agressive as 225 45 17s,. |
09-29-2022, 11:23 AM | #2 |
First Lieutenant
142
Rep 345
Posts |
If that is the goal you want:
-as wide of a tire as possible 255 front and either same rear or wider. My cars with wide tires go over most potholes in the NY/NJ area. My miata with my skinny snows fall into potholes and can crack suspension -as small a diameter rim as possible, but that you already know -a lighter wheel will cause less force when hitting a pothole, but most lighter wheels are also more delicate. A heavier wheel can take more beating but at the same time the unsprung weight will make the same pothole hit come with more force. So you want a light but tough wheel, which usually means exotic and expensive like flowed, forged, and or multi piece. -a rim slightly small in width to the tire. When the wheel holds the tire sidewall perfectly vertical more force of a pothole goes up into the wheel and into your suspension. If the wheel is slightly more narrow you get more tire sidewall flex and more pothole absorption. -not runflat tires, sidewall very stiff and transfer too much force -tire with softer sidewall than most to absorb more impact -softer springs, softer shocks. The more your suspension can absorb from the pothole hit the less force will go into the tire, wheels, suspension, chassis. -I've heard some people say tires with "rim protection" which is extra rubber along the rim lip help protect the wheel from bending or cracking, but I've heard others say it makes the sidewall stiffer and puts more impact into the suspension. So I'd ask tirerack about that one for their opinion. This is all OPPOSITE to performance tho. You're trading performance for softness to absorb pothole hits. Yes I've lived in NYC and north NJ all my life. We know potholes. |
Appreciate
0
|
12-12-2022, 01:37 PM | #5 |
Private
32
Rep 90
Posts |
Recommended tire pressure
I just switched to my winter tires, 225/45 R17's all around, and wondering about tire pressure.
My summer tires are 225/40ZR18 front, and 245/35ZR18 rear, with BMW recommended pressure on door marked as 32 front and 38 rear. With the 17" tires, I'm thinking of maybe 30 in front and 36 in rear, but maybe I need to stay with higher to better deal with potholes.
__________________
__________________________________________
'18 m230i, Mineral Grey, MT, M-sport, Track Handling, Premium, H-K audio, CarPlay, no Moonroof, '21 m330ix, Mineral Gray, Navi, Driver Assist, Park Assist, 19' orbit grey wheels (wife's car) |
Appreciate
0
|
12-16-2022, 04:24 PM | #6 |
DisplacementReplacement
397
Rep 1,096
Posts |
How bad was the impact on acceleration with the taller tire (or not noticeable)? I'm sure it looks fantastic...
__________________
2020 X3M /// MHD Tune
Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30 |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|