Same size all round
Discussion
I ran Peters 17's all round at Marham Anthony, compared to the original 15/16's
I'd say I had less bite turning in on the fronts with the 17's but then I'd not really set the car up or played with tyre pressures,, although I had the shocks virtually rock solid. Remember it's smooth and fast there Anthony,,
My instinct is to go 17f 18r but with a bit of ride height adjustment etc I reckon the balance is still really good when running "same all round "
Al
I'd say I had less bite turning in on the fronts with the 17's but then I'd not really set the car up or played with tyre pressures,, although I had the shocks virtually rock solid. Remember it's smooth and fast there Anthony,,
My instinct is to go 17f 18r but with a bit of ride height adjustment etc I reckon the balance is still really good when running "same all round "
Al
I'm a bit odd though!!!!
I like a rock hard chassis that's totally flat and no give,,,
Slides easier but if you ram the fecker into the corner you'll still Roll and get on the outside edge of the tyre unless you have full race springs on,
I think you have to go pretty damn hard to provoke the front into understeer,
I just wondering wether the brakes work better on a smaller wheel as it's travelling faster so heats the disc quicker,,,
Now't to do with size, heat and pad composition is what stops you I reckon, big powerful calipers can't do any harm though!
Just thinking aloud,,,
Many ways to get the same results maybe !
I like a rock hard chassis that's totally flat and no give,,,
Slides easier but if you ram the fecker into the corner you'll still Roll and get on the outside edge of the tyre unless you have full race springs on,
I think you have to go pretty damn hard to provoke the front into understeer,
I just wondering wether the brakes work better on a smaller wheel as it's travelling faster so heats the disc quicker,,,
Now't to do with size, heat and pad composition is what stops you I reckon, big powerful calipers can't do any harm though!
Just thinking aloud,,,
Many ways to get the same results maybe !
Ah, got you.
What so run the same size on the fronts as on the rears,
To big and wide maybe, lack of bite on the fronts,, not enough weight on the footprint of the fronts but I sure it an be made to work, soft compound tyre and a bit more weight over the front and it might be the biz,,, are you still trying to stuff Peter,, hahahah, I love it, Hahahah .
What so run the same size on the fronts as on the rears,
To big and wide maybe, lack of bite on the fronts,, not enough weight on the footprint of the fronts but I sure it an be made to work, soft compound tyre and a bit more weight over the front and it might be the biz,,, are you still trying to stuff Peter,, hahahah, I love it, Hahahah .
brett84 said:
is yours PAS? Mine feels better now i've switched from 225 to 215 on the front but maybe thats partly because it hasn't got power steering.
If the geo is done after fitting same size wheels, it wouldn't have and ill effect over running larger rears would it?
Do those 215/45/17 catch on the front ? Mine caught on full lock and hard braking . They did feel better than the 215/40/17. If the geo is done after fitting same size wheels, it wouldn't have and ill effect over running larger rears would it?
Be careful on some of the load ratings ,it could invalidate your insurance .
SILICONEKID345HP said:
brett84 said:
is yours PAS? Mine feels better now i've switched from 225 to 215 on the front but maybe thats partly because it hasn't got power steering.
If the geo is done after fitting same size wheels, it wouldn't have and ill effect over running larger rears would it?
Do those 215/45/17 catch on the front ? Mine caught on full lock and hard braking . They did feel better than the 215/40/17. If the geo is done after fitting same size wheels, it wouldn't have and ill effect over running larger rears would it?
Be careful on some of the load ratings ,it could invalidate your insurance .
If you play with your geo you'll get most things to work on a balanced car,,,
I'd be worried about locking the front brakes on the roads, tyre too wide and not enough give, just slide away rather than squatting and digging into the Tarmac, ride height change and more bias to the front might make the car a sticky thing,,
I'd be worried about locking the front brakes on the roads, tyre too wide and not enough give, just slide away rather than squatting and digging into the Tarmac, ride height change and more bias to the front might make the car a sticky thing,,
phazed said:
Grahamm runs 255/40/17s all round on track on his cerb.
Don't sags run that size?
I'm not as Max Power as that - the tyres I have been offered are 225/45 17. I can see I just might have front catching issues on full lock, so need to do some thinking as I don't presently have any 225s to try. And I still have to persuade myself that 225s won't be worse than 215s.......I agree, why change, but my 215s will eventually wear out,. especially the way I drive on track Don't sags run that size?
While tryping this I have realised I am thinking in sets of 4 - but I could always use my present 215s, both front and rear, as the fronts for 2 sets, and use the offered set of 4 as my rears for two sets of tyres.....
QBee said:
I'm not as Max Power as that - the tyres I have been offered are 225/45 17. I can see I just might have front catching issues on full lock, so need to do some thinking as I don't presently have any 225s to try. And I still have to persuade myself that 225s won't be worse than 215s.......I agree, why change, but my 215s will eventually wear out,. especially the way I drive on track
While tryping this I have realised I am thinking in sets of 4 - but I could always use my present 215s, both front and rear, as the fronts for 2 sets, and use the offered set of 4 as my rears for two sets of tyres.....
Picked up my new RL7's from Quinny at the weekend and we got talking tyres, as you do. He'd tried 225/45/17 Federal's on the front of his Griff and had catching issues but the same tyres on his mates Chimp were OK - so might be alright.While tryping this I have realised I am thinking in sets of 4 - but I could always use my present 215s, both front and rear, as the fronts for 2 sets, and use the offered set of 4 as my rears for two sets of tyres.....
I've gone conservative with tyre sizes for the RL7's because of potential arch catching issues, ordered 215/40/17 and 245/40/17 Conti Sport Contact 3's. Excellent tyre that I've done tens of thousands of miles on (old M3, current 130i and also the Chim).
My only concern is stretch on the front with an 8j rim but I'm lead to believe 215/45/17 would have been no better (for stretch)
Did look at 225/35/17 but tyre choice was crap and reduction in circumference was significant.
Ps. Thanks for your experiments with tyre sizes on the other thread
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