Pro's and con's of 18" wheels
#1
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Pro's and con's of 18" wheels
I am looking for advice on 18" wheels as i have heard that they can cause problems with speedo bein inaccurate and also ruining the overall drive of the car I am currently on standard 17"'s and was gonna be getting a set of 18" during the week but if they might change the way it drives and feels im not too sure now
Cheers
Cheers
#3
I am looking for advice on 18" wheels as i have heard that they can cause problems with speedo bein inaccurate and also ruining the overall drive of the car I am currently on standard 17"'s and was gonna be getting a set of 18" during the week but if they might change the way it drives and feels im not too sure now
Cheers
Cheers
#4
And here, 18 OZ on and no speedo issues at all. Ride is not too hard either. If you choose your new 18inch tyre circumference the same as your old 17inch there is no change. I went 225 x 45 x 17 to 225 x 40 x 18.
#5
Hi there i run few days on borrowed 17"(courtesy of Maggs,because mine ha been powder coated ),car has been lower than on 18"...
18" are fine for bugeye or any new age Subaru with 225/40 18,lower profile i never try before...
Jura
18" are fine for bugeye or any new age Subaru with 225/40 18,lower profile i never try before...
Jura
#6
I am looking for advice on 18" wheels as i have heard that they can cause problems with speedo bein inaccurate and also ruining the overall drive of the car I am currently on standard 17"'s and was gonna be getting a set of 18" during the week but if they might change the way it drives and feels im not too sure now
Cheers
Cheers
18"s will not ruin the drive of the car, but 19's will.
Greg
#7
yea......and my bug drives fab with the pro drive 18"s .......but bloody blimey they are so easy to kirb........................eeeooooowwwwwwwccchhhh h.....seems like alot of differance in side wall thickness although its probabaly not even 10mm when compairing 45 x 17s and 40 x 18s
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#9
I switched from 17s to 18s on my blobeye WRX a few weeks back and noticed a couple of things.
1. The handling has improved and there is less Movement when cornering due to dropping down on tyre profile so there is less give in the tyre walls.
2 I have noticed a slight drop in acceleration however am having the car remapped next month so this doesn't bother me.
Overall I'm chuffed with the results and if you drop down a tyre profile ie from 45 to 40 you wont have any issues with speedo etc
1. The handling has improved and there is less Movement when cornering due to dropping down on tyre profile so there is less give in the tyre walls.
2 I have noticed a slight drop in acceleration however am having the car remapped next month so this doesn't bother me.
Overall I'm chuffed with the results and if you drop down a tyre profile ie from 45 to 40 you wont have any issues with speedo etc
#10
Aside from the 18" wheels having tyres with a lower profile which consequently give you a lower profile cushion between the rim and the road which means a slightly firmer ride, there will as has been said less side-wall to flex when cornering. The rolling circumference will remain roughly the same as running 17" rims with 45 profile tyres and depending on which new rims you buy, they might actually be lighter than the original rims.
I think the effects on acceleration are an area that could be debated all day, but looking at the physics of this wheel upgrade and by choosing the right tyre size to keep the rolling circumference the same, I can't honestly see it making a jot of difference. If there were to be a change in that circumference at the point at which the tyres contact the road, your speedometer readings would be affected and yes it would be like a subtle alteration which raises the car's gearing with a small reduction in acceleration.
Keep the rolling circumference as with previous wheels, then your main concern will be the inflated cost of the 18" tyres.
Tim
I think the effects on acceleration are an area that could be debated all day, but looking at the physics of this wheel upgrade and by choosing the right tyre size to keep the rolling circumference the same, I can't honestly see it making a jot of difference. If there were to be a change in that circumference at the point at which the tyres contact the road, your speedometer readings would be affected and yes it would be like a subtle alteration which raises the car's gearing with a small reduction in acceleration.
Keep the rolling circumference as with previous wheels, then your main concern will be the inflated cost of the 18" tyres.
Tim
#15
I have 18s on my classic, running 215/35s. They handle fine, if a little firm. My only concern is avoiding potholes due to having such a low profile You'll be fine on a Bug running 40 profile though
#18
This website is very handy for anyone considering changing the size of wheels on their car. It will tell you all you need to know about what effect any change will have on speedo accuracy:
wheel and tyre bible
wheel and tyre bible
#19
so on prodrive site for performance packs it quotes
No idea if thats true or not but im sure an expert will be along soon.
To fully benefit from the
extra torque levels
available, fitment of 18”
wheels & tyres are
recommended
extra torque levels
available, fitment of 18”
wheels & tyres are
recommended
#22
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#26
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Instructing with fear
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From: Www.Extreme-rally.co.uk
Ok so to revive this thread, the tires on the 18's at the moment are 215-35-18 and i think they they look too small so how much bigger can i go on standard sti suspension?
225-40
225-45
Tbh i would like to see more rubber around the rim
225-40
225-45
Tbh i would like to see more rubber around the rim
#28
You, on a newage, should be on 225/40/18's
#29