hachi28
Well-Known Member
Add in a few more PSI if you are driving with more passengers.
http://imageshack.com/a/img838/7703/ifvl.png
http://imageshack.com/a/img838/7703/ifvl.png
Find Your Tyre Pressure Here
- Thread starter hachi28
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Red_Bean_Bun
Well-Known Member
Re: Find Your Tyre Pressure Here
The F10 runs with 29 in the front ...... Wow ......
The F10 runs with 29 in the front ...... Wow ......
hachi28
Well-Known Member
Re: Find Your Tyre Pressure Here
Yup, if you dun want yur ride to be too bumpy.
Your front can add up to 37 PSI if your car have more passengers.
But a good ballpark figure will be 32 PSI for the front if you dun always drive alone.
Red_Bean_Bun;1079938 said:
Yup, if you dun want yur ride to be too bumpy.
Your front can add up to 37 PSI if your car have more passengers.
But a good ballpark figure will be 32 PSI for the front if you dun always drive alone.
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The Guardian
Well-Known Member
Re: Find Your Tyre Pressure Here
I hv the same set up n I kept it at 36/38 with no load all the time.
I should change to a 2 seater instead.
MW;1079930 said:
I hv the same set up n I kept it at 36/38 with no load all the time.
I should change to a 2 seater instead.
Re: Find Your Tyre Pressure Here
Very iffy guide.
Learn to play around with the pressure numbers - given your own driving patterns, handling/suspension set-ups, cambers, tyre brands, width, sidewall flexes/compounds, loads...........
Not to mention that the air pumps in petrol stations are extremely inconsistent.....
Very iffy guide.
Learn to play around with the pressure numbers - given your own driving patterns, handling/suspension set-ups, cambers, tyre brands, width, sidewall flexes/compounds, loads...........
Not to mention that the air pumps in petrol stations are extremely inconsistent.....
detach8
Well-Known Member
Find Your Tyre Pressure Here
The ones on the B pillar arent?
Note our tyre pressures can be different from cold/winter countries (usually lower) and US (their door cards have the max load pressure only). I usually overinflate my front a little as i think the pressure is too low causing tyre wear on the outside.
The pressures on the chart looks wrong and I suggest you inflate front to 32-33psi (18"). Going higher on the front will reduce understeer.
The ones on the B pillar arent?
Note our tyre pressures can be different from cold/winter countries (usually lower) and US (their door cards have the max load pressure only). I usually overinflate my front a little as i think the pressure is too low causing tyre wear on the outside.
The pressures on the chart looks wrong and I suggest you inflate front to 32-33psi (18"). Going higher on the front will reduce understeer.
Last edited by a moderator:
hachi28
Well-Known Member
Re: Find Your Tyre Pressure Here
Thank you for advise. The above chart is from BMW specs and so is the B pillar, there is only one specs from BMW.
View attachment 60816
detach8;1080548 said:
Thank you for advise. The above chart is from BMW specs and so is the B pillar, there is only one specs from BMW.
View attachment 60816
detach8
Well-Known Member
Re: Find Your Tyre Pressure Here
I have 18" staggered on my F10 and I'm still fiddling with my tyre pressures.
I'm running F=34psi/2.3bar and R=35psi/2.4 bar.
It's funny how the stock recommendation is F=29psi/2.0bar and R=34psi/2.3bar. That's way too low -- even my old and lighter E90 with 18" staggered wheels were running I think high 30s, something like F=36, R=39. All these are spec'ed for RFTs.
Similarly my Z4 also ran F=36 R=39 on stock 17" (non-staggered). I had deliberately increased the front by around 3-4psi due to the massive understeer that the car had. At 36 psi the car was much better balanced. Granted 18" or 19" tyres would have lower pressures, mid to high 30s still look pretty correct. Those who track often will understand what I mean.
I feel that the E series cars are more balanced and hence the tyre pressures are also more representative of how BMW used them to manipulate the handling of the car (understeer vs oversteer). I recently chanced upon an article comparing M3 and M5 front/rear track widths over the generations. It is interesting to note that the current generation F10 M5 has much wider front track, while the M3s always had a wider rear track. This is a likely indication that the 5er is a nose heavy and understeer prone car, so the wider front track is to help reduce that. It'd even more interesting to note that the E90 M3 had almost equal front and rear track = perfectly square and balanced. I'll need to go dig for that article.
Just for interest, I dug up F30 tyre pressures and it seems they're also recommending 2.2 bar ~32psi up front for 18"s, which seems a bit low.
I think the low pressure settings on the door cards are designed for comfort + cold weather. The softer suspension also plays a part here (E series cars have much stiffer suspension). In cold countries the tyres heat up much more after driving and raises pressure by up to 4psi. Here in SG our weather is already warm, our travelling distances are short and our speeds are relatively low, so our tyre pressures don't fluctuate that much although on a super hot hot hot day it may rise by 4psi but more importantly we want our tyres to be properly inflated in the WET, and when it's wet it's cold.
After just driving my car for 3 weeks I'm already seeing pretty obvious wear on the outside of my front tyres. I'll try to get some pic shots later. The rears still seem OK, so I left it at that. I'm on Pirelli RFTs.
As an interesting note, my old folks's Merc W211 E230 with almost similar weight (~1.7 tonnes) and surprising pretty close F/R balance as the F10 also recommends a low 30psi pressure for the front and it drove like crap (muddy feel from steering) and had the outer edges of the tyres worn down badly.
Try 34 psi on the front and tell me how the car feels after that.
I have 18" staggered on my F10 and I'm still fiddling with my tyre pressures.
I'm running F=34psi/2.3bar and R=35psi/2.4 bar.
It's funny how the stock recommendation is F=29psi/2.0bar and R=34psi/2.3bar. That's way too low -- even my old and lighter E90 with 18" staggered wheels were running I think high 30s, something like F=36, R=39. All these are spec'ed for RFTs.
Similarly my Z4 also ran F=36 R=39 on stock 17" (non-staggered). I had deliberately increased the front by around 3-4psi due to the massive understeer that the car had. At 36 psi the car was much better balanced. Granted 18" or 19" tyres would have lower pressures, mid to high 30s still look pretty correct. Those who track often will understand what I mean.
I feel that the E series cars are more balanced and hence the tyre pressures are also more representative of how BMW used them to manipulate the handling of the car (understeer vs oversteer). I recently chanced upon an article comparing M3 and M5 front/rear track widths over the generations. It is interesting to note that the current generation F10 M5 has much wider front track, while the M3s always had a wider rear track. This is a likely indication that the 5er is a nose heavy and understeer prone car, so the wider front track is to help reduce that. It'd even more interesting to note that the E90 M3 had almost equal front and rear track = perfectly square and balanced. I'll need to go dig for that article.
Just for interest, I dug up F30 tyre pressures and it seems they're also recommending 2.2 bar ~32psi up front for 18"s, which seems a bit low.
I think the low pressure settings on the door cards are designed for comfort + cold weather. The softer suspension also plays a part here (E series cars have much stiffer suspension). In cold countries the tyres heat up much more after driving and raises pressure by up to 4psi. Here in SG our weather is already warm, our travelling distances are short and our speeds are relatively low, so our tyre pressures don't fluctuate that much although on a super hot hot hot day it may rise by 4psi but more importantly we want our tyres to be properly inflated in the WET, and when it's wet it's cold.
After just driving my car for 3 weeks I'm already seeing pretty obvious wear on the outside of my front tyres. I'll try to get some pic shots later. The rears still seem OK, so I left it at that. I'm on Pirelli RFTs.
As an interesting note, my old folks's Merc W211 E230 with almost similar weight (~1.7 tonnes) and surprising pretty close F/R balance as the F10 also recommends a low 30psi pressure for the front and it drove like crap (muddy feel from steering) and had the outer edges of the tyres worn down badly.
Try 34 psi on the front and tell me how the car feels after that.
Last edited by a moderator:
detach8
Well-Known Member
Re: Find Your Tyre Pressure Here
Here's the article with the track widths:
M Cars Get Wider, and Wider, and Wider
Here's the article with the track widths:
M Cars Get Wider, and Wider, and Wider
hachi28
Well-Known Member
Re: Find Your Tyre Pressure Here
Good follow-up question...
For our 18", the specs indicate we can have it from 200kPa - 260kPa, depending on the amount of ppl/load in the car.
34 psi is fine and I have tried the maximum of 37 psi but to find it too bumpy.
As mentioned earlier, a good ballpark figure can be 32 psi.
Any better understanding will have to email BMW engineers regarding their specs.
detach8;1080940 said:
Good follow-up question...
For our 18", the specs indicate we can have it from 200kPa - 260kPa, depending on the amount of ppl/load in the car.
34 psi is fine and I have tried the maximum of 37 psi but to find it too bumpy.
As mentioned earlier, a good ballpark figure can be 32 psi.
Any better understanding will have to email BMW engineers regarding their specs.
detach8
Well-Known Member
Re: Find Your Tyre Pressure Here
Just an update after more than half a year of trial and error.
I've been running 35psi/2.4bar all round for my stock 18" staggered setup (245mm front, 275mm rear) and I find that it is working well for me.
The increase in front tyre pressure took away the distinctive shoulder wear and also made the car feel more direct and does not tend to understeer that much. The original 29-30psi recommended pressure was way too spongy.
I'd recommend all F10 bros to experiment and inflate their fronts closer to the max load rating pressures (the pressure for a fully loaded car with front 245mm 18"s is 260kPa/37 psi, and I believe most people have this same tyre profile with stock rims).
And given the recent downpour, it is safer to drive with a slightly over-inflated tyre than under-inflated one.
The next thing I'm going to do is to set neutral toe-in on my front when I go for a wheel alignment job to see if that helps make the car's handling more responsive.
Just an update after more than half a year of trial and error.
I've been running 35psi/2.4bar all round for my stock 18" staggered setup (245mm front, 275mm rear) and I find that it is working well for me.
The increase in front tyre pressure took away the distinctive shoulder wear and also made the car feel more direct and does not tend to understeer that much. The original 29-30psi recommended pressure was way too spongy.
I'd recommend all F10 bros to experiment and inflate their fronts closer to the max load rating pressures (the pressure for a fully loaded car with front 245mm 18"s is 260kPa/37 psi, and I believe most people have this same tyre profile with stock rims).
And given the recent downpour, it is safer to drive with a slightly over-inflated tyre than under-inflated one.
The next thing I'm going to do is to set neutral toe-in on my front when I go for a wheel alignment job to see if that helps make the car's handling more responsive.
Last edited by a moderator:
Red_Bean_Bun
Well-Known Member
Re: Find Your Tyre Pressure Here
Front neutral toe would make it very responsive. But in straight line driving can be a PITA because steering is easily influenced by road contours resulting in tramlining ..... Keep both hands on the steering if you align it to neutral toe in the front.
Front neutral toe would make it very responsive. But in straight line driving can be a PITA because steering is easily influenced by road contours resulting in tramlining ..... Keep both hands on the steering if you align it to neutral toe in the front.
detach8;1104886 said:
EleBest
Well-Known Member
Re: Find Your Tyre Pressure Here
Find your tyre pressure Here:
View attachment 65137
View attachment 65139
Find your tyre pressure Here:
View attachment 65137
View attachment 65139
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