interestedparty
|
| posted on 22/8/10 at 07:02 AM |
|
|
235 tyres, too wide for a 7?
I have a set of wheels and tyres (I expect to change the tyres) that are 235/50 17. I know they will be heavier than a set of 13" wheels with
somthing like 185 tyres but are they actually unsuitable?
Assuming bodywork is not an issue.
Opinions sought.
[Edited on 22/8/10 by interestedparty]
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
|
|
|
|
|
pekwah1
|
| posted on 22/8/10 at 07:15 AM |
|
|
i assume these are for the rear? what are you running up front?
I don't know much so i'm sure i'll get corrected here, but drive tyre size should be relevant to the power and weight for optimum
traction. When you start going too wide without the power to justify it, you're adding more contact area and more friction and if i'm
correct it will result in a less nimble car due to the extra friction taking more effort to change direction.
I'm running 13s with 185s all round, but then i'm only using a xflow so around 100hp probably....
|
|
|
interestedparty
|
| posted on 22/8/10 at 07:17 AM |
|
|
This would be 235 all round, and around 250 bhp
[Edited on 22/8/10 by interestedparty]
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
|
|
|
britishtrident
|
| posted on 22/8/10 at 07:20 AM |
|
|
Strongly advise against such wide tyres on the front.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
Flamez
|
| posted on 22/8/10 at 07:28 AM |
|
|
I have 185/13 front 205/13 rear and grip is great in the dry, (r888)
my build mac1motorsports
|
|
|
tomgregory2000
|
| posted on 22/8/10 at 07:28 AM |
|
|
i have 215 (r888) on the front and 275 (kumo v70) on the back
[Edited on 22/8/10 by tomgregory2000]
|
|
|
davestarck
|
| posted on 22/8/10 at 08:14 AM |
|
|
When I bought my Indy R1 it had 17" rims and handled like a sack of potatoes due to no give in the tyre wall. Changed to 15" and a totally
better car to drive. 
|
|
|
RazMan
|
| posted on 22/8/10 at 09:01 AM |
|
|
I have 215/40 front & 235/40 rear (on 7" & 8" rims). I think a /40 profile would suit your car better and you might find a /50
profile a bit high. You shouldn't need anything more than a 205 -215 on the front - anything wider will damage your handling IMO.
Mind you, you don't mention the rim sizes and a lot depends on the widths - If you've got 8" front and rear you might have problems
getting the right tyres on the front.
[Edited on 22-8-10 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
franky
|
| posted on 22/8/10 at 11:00 AM |
|
|
As above, they may be too wide for the front.
From the books I've read and people in the know i've spoken too its not the size of the wheel that will ruin your handling its just the
weight. You can get 17" wheels that are lighter than some 13/14's so maybe you could weigh your wheels to see where you're starting
at?
|
|
|
scootz
|
| posted on 22/8/10 at 11:05 AM |
|
|
Have to agree with some of the others... 235's are not too wide for the rear, but may well prove to be a bit of a pig on the front.
It's Evolution Baby!
|
|
|
interestedparty
|
| posted on 22/8/10 at 11:13 AM |
|
|
People are suggesting that they are too wide for the front. I'm not disagreeing with that, in fact I was dubious and thats whi I started the
thread- but no-one is saying exactly what they think the problem is likely to be (apart from being too wide  ).
What is the nature of the problems likely to be encountered?
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
|
|
|
scootz
|
| posted on 22/8/10 at 11:21 AM |
|
|
Horrible tram-lining!
It's Evolution Baby!
|
|
|
RazMan
|
| posted on 22/8/10 at 11:33 AM |
|
|
Tramlining might be an issue when going wider on the front but oversteer will also creep in and turn in will be less precise.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
tomgregory2000
|
| posted on 22/8/10 at 11:50 AM |
|
|
wot them 2 said
|
|
|
britishtrident
|
| posted on 22/8/10 at 04:29 PM |
|
|
General loss of steering feel and precision, it is a good idea to take a look at the relative front & rear tyre sizes used by Caterham.
Our views on tyre widths and wheel diameters tend to get a bit distorted by the tyres requirements of hot FWD cars. With hot hatches the front
wheels & brakes can never big enough to do all that is required of them.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
procomp
|
| posted on 22/8/10 at 08:25 PM |
|
|
Hi
With 235 width tyres you are going to need very very good control of the camber. If it's not controlled you will have serious issues with
instability. That applies to both front and rear.
Cheers Matt
|
|
|
