View Full Version : Widest (safe) tyre on stock 17"?
Hi All,
My rear tyres (on stock 17" wheels - 9.5"width) need replacing and so I was considering perhaps going up a size or two from the standard 255/40/17. I am considering going for 275's. I spoke to Micheldever who didn't seem keen on this, and I spoke to Bracknell Tyre and Battery who seemed to think this wouldn't be a problem. - although I would need to give them the required profile (40/35 etc). I had a trawl in the archives but nothing really conclusive was found. So, my question is two-fold:
a) what is the widest width and profile on stock 17" rears people are running?
b) what problems/benefits were experienced going to the wider width and (possibly) lower profile.
Rgds,
275/40's max on stock 17" rears IMO.
Remember if you want to keep grip balance then you should bring your front width upto 245.
Originally posted by Thorin
275/40's max on stock 17" rears IMO.
Cheers Thorin. I am hopingh I would be able to get away with this size but my view is somewhat 1-dimensional - I am looking mainly at the increased grip that would be achieved given the increased footprint.
Rgds,
Originally posted by AJI
Remember if you want to keep grip balance then you should bring your front width upto 245.
Hmmm, this is something I had not considered, thinking that the stock width of 235 was sufficient. But wouldn't going to 245 at the front cause them to rub?
Cheers,
Raoul, go to www.tirerack.com
Choose the type of tyre you are looking at the go to specs. This will give max & minimum wheel widths for the choosen sizes.
If you look at say a Goodyear F1 eagle then a 275/40/17 is spot on for the width of 9.5"
http://www.tirerack.com/tires/Spec.jsp?make=Goodyear&model=Eagle+F1+Supercar
Good luck
Originally posted by Terry S
Raoul, go to www.tirerack.com
Choose the type of tyre you are looking at the go to specs. This will give max & minimum wheel widths for the choosen sizes.
If you look at say a Goodyear F1 eagle then a 275/40/17 is spot on for the width of 9.5"
http://www.tirerack.com/tires/Spec.jsp?make=Goodyear&model=Eagle+F1+Supercar
Good luck
Cheers Terry,
Had a look and yes the min/max rim width supported suitable for 275s is 9"/11" respectively. So that is good. But 'real world' experiences on the Supra would be better. As AJI mentioned, there may be a grip imbalance front to back. It would be great to get a handle on what other issues there may be especially if safety could be compromised.
Rgds,
Hi, if it's any use and you stay standard, i've got a almost new 255/40/17 for sale @ £40? Al.
Slightly increased rolling resistance affecting top speed / fuel economy, obviously.
:looney:
Originally posted by Supra_Al
Hi, if it's any use and you stay standard, i've got a almost new 255/40/17 for sale @ £40? Al.
DOH!:p Only joking. I've decided to try 275/40s having done a bit more searching around. It should be ok. The fronts are not due for a change just yet, so it will be an opportuinity to see whether I do get an imbalance. Thanks for all the input guys...
The tyre:
Kumho Ecsta Supra 712 275/40/17.
£91 each from Bracknell Tyre and Battery.
Getting tomorrow.
I am currently running this brand all round and have no complaints regarding grip/handling or otherwise. I mean if my Kumho-shod Supra could keep Justin's (B1SEP) old Evo honest around Camber Sands that's good enough for me.:p
Rgds,
Originally posted by lust2luv
Slightly increased rolling resistance affecting top speed / fuel economy, obviously.
:looney:
Cheers for that. Hmmm seems obvious now. But I can live with that - seems a fair exchange for more grip.:looney:
Rgds,
Just for interest Raoul, if/when my tyres go AWOL, I plan to get
EXACTLY the same sizes ! ! !
245/45/17 front , 275/40/17 rear ! !
I'm after a tidge' more grip but also a smidgin' better RIM-PROTECTION :p
The 255's are just about jutted-out, but I still manage to just
catch the rim edge (I know.... TIT:D )
PLUS, every bit wider at the back MUST look better from behind ??
(AND, I would also probably go for either the Khumo Supra's, or,
the Goodyears - IF I have extra cash at the time !?)
YES, the speedo accuracy WILL alter.... it will be MORE acurate...
'cos it OVER-reads at the moment....will 'come-back-down' slightly
with the larger Diam'(only slightly though!)
FatS.
Originally posted by Steve W
Just for interest Raoul, if/when my tyres go AWOL, I plan to get
EXACTLY the same sizes ! ! !
245/45/17 front , 275/40/17 rear ! !
I'm after a tidge' more grip but also a smidgin' better RIM-PROTECTION :p
The 255's are just about jutted-out, but I still manage to just
catch the rim edge (I know.... TIT:D )
PLUS, every bit wider at the back MUST look better from behind ??
(AND, I would also probably go for either the Khumo Supra's, or,
the Goodyears - IF I have extra cash at the time !?)
YES, the speedo accuracy WILL alter.... it will be MORE acurate...
'cos it OVER-reads at the moment....will 'come-back-down' slightly
with the larger Diam'(only slightly though!)
FatS.
Hey Chap,
Don't talk to me about rim protection mate!:twak: After finding a set of nice stock 17's and getting them looking mint, I've gone and given them a curb rash the like as has never been seen before. Mainly the rears mind. So, they will be going back to Spit & Polish in the not too distant future. I'll be getting them colour-coded: 'pavement gray' :p
Rgds,
I've requested that the council coat the kerb-stones with a
rubberised paint.....
They haven't replied so far ? ?
Should I re-send the request ? It must have got lost in the post ?
:p
I run 275/40 17" on my NA on stock wheels, S0-2s. Feels good, and still a bit of space.
Originally posted by Syed Shah
I run 275/40 17" on my NA on stock wheels, S0-2s. Feels good, and still a bit of space.
I must agree here albeit I've only just acquired mine for my TT. So far my 275/40/17 Kumhos feel very good and there is loads of room left for a larger section tyre. Would need larger wheels to exploit it though.:mad:
Rgds,
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