front tyre pressure?

[Deer Slayer]

Good point, it DOES matter whether you have 14" or 15" wheels so we should each specify, though the reader can probably tell if the year of the Spyder is mentioned.

On our '14 ST-S I've found 20-22 lbs feels best for the fronts, and 28 in the rear. I prefer a bit more responsive steering, and don't like it to roll on the outside edge of the front tires when cornering hard.

My RS-S is 2014, and at 22 in the front the lighter RS-S front bounced like a ball. I am at 16 nitrogen and carves the twisties very nicely.

[jadatis]

I have tried everything from 8 lbs to 30 lbs for me I find that 18 seems best
Ride Safe
Dave

I am able to calculate a lowest cold pressure wich dont give damage to tyre at the speed you drive.

For that I need tyre-data: Maximum load or Loadindex, Kind of tyre to determine the AT-pressure/reference-pressure/ maxloadpressure/pressure needed for the maximum load up to max speed of tyre ( or if lower 160km/99m/h) and is not the maximum pressure of tyre, and the speedcode .

From your spider I need at best seperatately weighed wheel loads in the loading you use.
This can probably even be done with a normal persons weighing scale, and some help of other , because you yourselfes must be on it to get the right weights. Also need the maximum speed you use and wont go over for even a minute.

Give all that and I will calculate, but the low pressure is often used also for other vehicles , like carts , or verry light cars on oversised wheels.
In the beginning of my tyre-pressure story I once calculated it for a Westfield also 18 psi and then even used the maximum pressure of 4.16bar/60psi instead of the AT-pressure/// for these probly XL/reinforced/Extraload tyres of 2.9bar/42psi.

Greatings from a Dutch pigheaded self declared tyre-pressure-specialist.

[jrk36]

I know people respond to queries such as this with the best of intentions. BUT, I do so wish people would stick to the Forum that represents their own model. People advising tyre pressures for an RS (remember, that's this forum BTW) when they own ST or perish the thought a RT-LTD is most misleading.

An RS weighs 798lb (262kg), ST is 864lb (392kg), and a RT-LTD 1012lb (459kg) - oh, I see they are a little different in weight! Well, perhaps they benefit from different damned tyre pressures!

End of winge

Oh, BTW, my 2008 RS SM5 runs quite nicely on 15psi front, 28psi rear (none of which are Kenda!)

[chris56]

in all these seven years I used the original Kendas on the front (24.000 mls on the 2009 RT)..
this Saison started very rainy and I decided to change not only the rear one like every year .. so I took a pair of Pirellis for the front with 20 psi - ( 30 psi in the rear Toyo )

.. the handling is now so much easier - feels like someone switched ON the power steering ?!?
I don`t know if that comes from the new tires which look a little smaller on their shoulders or I always had too less pressure in my Kendas (16 psi) ..
another story is that they worked halve an hour to balance the front wheels .. but still not perfect
(paid 300,- for all including work - a Pirelli for the rear would cost 400,- maybe for next year..)