hi i have just got sum mondeo alloys i think they are 17`s but can i use a smaller tyre for example 195/ 50 r15 opposed to the mondeo wheel 205/50 87v
no idea what this means lol btw they are mondeo st 24 alloys cheers paul
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| Author: | paul88 [ Thu Jun 19, 2008 10:44 pm ] |
| Post subject: | alloys and tyres |
hi i have just got sum mondeo alloys i think they are 17`s but can i use a smaller tyre for example 195/ 50 r15 opposed to the mondeo wheel 205/50 87v no idea what this means lol btw they are mondeo st 24 alloys cheers paul |
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| Author: | woodsy_mv6 [ Thu Jun 19, 2008 10:51 pm ] |
| Post subject: | Re: alloys and tyres |
What tytes does your fez run on fella?? Aim should be to match the rolling radius 
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| Author: | paul88 [ Thu Jun 19, 2008 10:53 pm ] |
| Post subject: | Re: alloys and tyres |
195/ 50 r15 cheers fella paul |
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| Author: | will121 [ Thu Jun 19, 2008 11:28 pm ] |
| Post subject: | Re: alloys and tyres |
think standard ST24 alloys are 16" not 17" if so as you currently running 195/50/15's could possibly get away with either 195/45/16 tyres. but if they are 17", TOYO also do 195/40/17's which is about the same rolling radius. but either way would expect you would have clearance problems especially if lowered too!. |
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| Author: | woodsy_mv6 [ Thu Jun 19, 2008 11:28 pm ] |
| Post subject: | Re: alloys and tyres |
Right mate. First thing to do is work out your existing rolling radius.... 15" rims so 15 x 2.54166 = 38.125cm. Tyre aspect = 50mm. top and bottom wall, so thats 100mm or 10cm So rolling radius is 48.125cm 17" rims.....17 x 2.54166 = 43.20833 standard 48.125 minus your new wheels 43.20833 means you have 4.9166cm to play with regarding tyre aspect. 2 walls so divide your 4.9166 by 2 gives you 2.45833cm......near enough 25mm So to run 17" wheels without cocking up your speedo, affecting your turning circle, causing scrubbing you should be looking at running something like 205/25/17, maybe 215/25/17 dependent on your rim width. IMVHO 16's are a far better comprimise for the road |
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| Author: | woodsy_mv6 [ Thu Jun 19, 2008 11:31 pm ] |
| Post subject: | Re: alloys and tyres |
| Author: | will121 [ Thu Jun 19, 2008 11:32 pm ] |
| Post subject: | Re: alloys and tyres |
thats a lot of maths for this time of night! i just looked at this for the easy answer 
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| Author: | happypaul [ Fri Jun 20, 2008 12:18 am ] |
| Post subject: | Re: alloys and tyres |
For ease I would go 195 40 R16 If you are lowered, or plan to go lower, using 205's can turn out to be fun. Then again depends on the ofset and the width of the wheel.. but most seem to think 16's on a fiesta should be run with 195's, so thats why i went ahead and fitted 205's 
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| Author: | paul88 [ Fri Jun 20, 2008 2:32 am ] |
| Post subject: | Re: alloys and tyres |
so basically if i fit 195/40/16 then i shud be able to get awasy with using these alooys obviously with the use of spacers but how many spacers and what mm and can i still lower it lol cheers paul |
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| Author: | woodsy_mv6 [ Fri Jun 20, 2008 9:13 am ] |
| Post subject: | Re: alloys and tyres |
| Author: | happypaul [ Fri Jun 20, 2008 9:52 am ] |
| Post subject: | Re: alloys and tyres |
Well my rims are 7 or 7.5j wide, cant remember But they are off a sierra group a car, so i have to space them out 3mm on front, which gives me a scary gap of 1.5mm from the shocker, and have them spaced 5mm on the rear due to the coilovers I am lowered probably the equivilent of 40-50mm on the front, and between 60-80mm on back depending on my mood Thats with the arch lips cut off 
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