|
||||||||||
|
||||||||||
15 May 2008, 18:14 (Ref:2203314) | #1 | |
Veteran
Join Date: Mar 2007
Posts: 775
|
Tyres: what'll work best?
What would be the best option? 6" wide tyres on 7" wide rims or 7"wide tyres on 6" wide rims? I can't fit 7" wide tyres with 7"wide rims on my car<I'm currently using the 6" rims with 7" tyres.
Also: Dunlops,Avons or Hoosiers? |
|
|
15 May 2008, 19:17 (Ref:2203360) | #2 | ||
Veteran
Join Date: Sep 2006
Posts: 12,853
|
6in tyres on the sevens,and Hoosiers,should be reasonably responsive,then of course you'll have to play with the pressures to suit.
|
||
__________________
Living the dream,Chief instruktor and racing on the worlds best circuits-The Nordschleife and Spa.Getting to drive the worlds best cars-someone has to do it, so glad its me. |
16 May 2008, 23:45 (Ref:2204451) | #3 | |
Racer
Join Date: Oct 2005
Posts: 234
|
Assuming the mass (thats mass not weight) between the 6" wide and 7" wide rims is the same and you have lots of engine torque then you should run 6" wide rims with the 7" wide tyres.
I leave you to figure why and it isnt obvious The tyre choice is heavily dependent upon vertical loads the tyres have to experience, simply just go and test them all. Last edited by TEAM78; 16 May 2008 at 23:51. |
|
__________________
If you want to make a million pounds in motorsport start with ten million pounds |
17 May 2008, 10:19 (Ref:2204616) | #4 | ||
Veteran
Join Date: Jul 2005
Posts: 1,981
|
Quote:
|
||
|
18 May 2008, 06:33 (Ref:2205169) | #5 | ||
Veteran
Join Date: Jan 2003
Posts: 2,071
|
in my experience with a saloon car on slicks best results always come from wider rim, narrower tyre combo
|
||
__________________
AKA Guru its not speed thats dangerous, just the sudden lack of it! |
18 May 2008, 09:12 (Ref:2205222) | #6 | ||
Racer
Join Date: Mar 2003
Posts: 147
|
You don't say what diameter, another factor to consider is the weight of the car and availability of compounds for your chosen size?
|
||
__________________
last year it was fast and fragile, this year it's just fragile!! |
18 May 2008, 12:28 (Ref:2205427) | #7 | |
Racer
Join Date: Oct 2005
Posts: 234
|
I can see this becoming a raging debate because the tyre is quite simply a very complex thing that is still far from being fully understood now, my reasons behind my assumed guess is that firstly the vehicle isnt overtyred and therefore needing as much grip as possible, If thats the case you then need to obtain as great as tyre volume as possible along with as much of mechanical keying with the surface. As approx guesses you get as wide a tyre as possible with the softest compound as possible, then work towards harder compounds if the tyre over heats,
Given all else is sensible in profile carcuss construction etc.... Graham thats quite an interesting statement as I have always found the opposite to be true, Just goes to show that the best way to find out which tyre rim combo is best by simply testing, Its always cheapest to just go and test the combinations on a test day. this thread is almost pointless without a huge amount more info, but I guess copperbottom wanted a couple quick fire answers. Certainly got them now |
|
__________________
If you want to make a million pounds in motorsport start with ten million pounds |
18 May 2008, 13:18 (Ref:2205490) | #8 | |
Veteran
Join Date: Mar 2007
Posts: 775
|
Well: my car weighs 850kg with driver,has 175bhp,is rwd and is probably undertyred,I've been using 6" rims with 7-21-13 Avon slicks in sprints for the last 5 years,I've now moved onto racing and found that the compound I chose was too hard so I've got to buy new tyres I tried 7" tyres on 7" rims but they foul the rear arches! .Thanks for the answers so far
|
|
|
18 May 2008, 16:49 (Ref:2205650) | #9 | |||
Veteran
Join Date: Jan 2003
Posts: 2,071
|
Quote:
|
|||
__________________
AKA Guru its not speed thats dangerous, just the sudden lack of it! |
18 May 2008, 20:09 (Ref:2205799) | #10 | |
Racer
Join Date: Oct 2005
Posts: 234
|
i remember reading in the high performance tyre book about some guys were tyre testing and they found exactly what Graham describes but they also found everytime they widened the tyre the car went quicker again as well.
|
|
__________________
If you want to make a million pounds in motorsport start with ten million pounds |
21 May 2008, 00:12 (Ref:2207890) | #11 | |||
Veteran
Join Date: Apr 2006
Posts: 1,911
|
Quote:
I have never seen a tyre manufacture recommend a tyre that is actually narrower than the rim, the same yes 10% tyre wider, yes, but never more rim. |
|||
__________________
Contrary to popular opinion, I do have mechanical sympathy, I always feel sorry for the cars I drive. |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Soft tyres, hard tyres | Hugh Jarce | Formula One | 6 | 15 Apr 2007 15:32 |
What'll happen at the Spanish Grand Prix? | Hazard | Formula One | 15 | 9 May 2004 13:34 |
Testing on Old tyres ? does that mean USED tyres ? | darcym | Formula One | 3 | 3 Jul 2003 15:07 |
Could it work? | Danielsun | Touring Car Racing | 7 | 21 May 2000 23:27 |