OEM 20" GT4 Bridgestone RE-71R status
#63
I'm interested in your findings also. I'm only recommending 245 up front unless someone finds out the 255 has clearance. I know things are tight up front.
The 245's have come into stock. Anyone who has them pre-ordered with me should have allocation. The 295's are still inbound into the US, and we are likely to see them late September.
The 245's have come into stock. Anyone who has them pre-ordered with me should have allocation. The 295's are still inbound into the US, and we are likely to see them late September.
#64
Hi Damon, can I ask you to suggest a new technical TireRack test to
help racers get the best tire?
I would pay good money to know whether a wider tire, always performs
better than a narrower one, on the same rim. I hear lots of anecdotal
evidence that if the tire has a stiff sidewall, a narrower tire that is perfect
for the rim (the sidewalls are far enough apart at the bead to keep the
sidewalls vertical or even a little out) will stick better than a one-size-
wider tire whose sidewalls get pinched in by the rim.
Thanks for being on the forum!
Joe
help racers get the best tire?
I would pay good money to know whether a wider tire, always performs
better than a narrower one, on the same rim. I hear lots of anecdotal
evidence that if the tire has a stiff sidewall, a narrower tire that is perfect
for the rim (the sidewalls are far enough apart at the bead to keep the
sidewalls vertical or even a little out) will stick better than a one-size-
wider tire whose sidewalls get pinched in by the rim.
Thanks for being on the forum!
Joe
#65
I would pay good money to know whether a wider tire, always performs better than a narrower one, on the same rim. I hear lots of anecdotal evidence that if the tire has a stiff sidewall, a narrower tire that is perfect for the rim (the sidewalls are far enough apart at the bead to keep the
sidewalls vertical or even a little out) will stick better than a one-size-wider tire whose sidewalls get pinched in by the rim.
sidewalls vertical or even a little out) will stick better than a one-size-wider tire whose sidewalls get pinched in by the rim.
The track junkies (of which I'm one) found that moving from an 8 inch-wide rim to 9 inches (for a 225 tire) improved lap times significantly (1-2 seconds on a 2-3 minute track). Again, not only more grip, but more usable grip. With the availability of 245 section width grippy tires (which are wide for a Miata), the move is now to use 10 inch and even 11 inch-wide rims, with similar improvements. I haven't done this, as it requires hacking up the fenders and installing flares.
So, while I have no hard data for the Porsche world, I suspect the same rule-of-thumb will hold true.
#67
to run a 245/35 on the 8.5 rim, or the 255/40?
For the old bias-plied tires, and even for Hoosier DOT-Rs, they tolerate and
work on narrow rims, I've seen 315s crammed onto 9.5" rims, but the
trend for more normal radial street tires is to not pinch. Just super curious
whether the 255 works on its narrowest-spec rim and an 8.9" tread width,
vs. the 245/35 which will be closer to the sweetspot, but maybe drop 0.5"
of tread width... And the taller 255 would induce more push, and make the
ABS think the wheel is slower, so take braking off the front? Pondering...
I think that unless the 245 comes in over-narrow in tread width, I think it
will be the way to go...
#68
I just assumed that one could extrapolate. Okay, to clarify: Based on experience in the Miata world, a narrower tire on a rim slightly wider than the tread width (which will pull the sidewalls out slightly from the tread) is faster than a wider tire on the same width rim that ends up with pinched (or even completely vertical) sidewalls. Look up the tread width of the tire you're considering and compare it to the rim width. If the tread is wider than the rim, you'll probably lose performance over a narrower tire.
#70
#71
Update for those who have them on order: The front 245 is in stock, and the rear 295's are in the US. Bridgestone is presently distributing them to their warehouses for delivery to ours. If you would like to get a set on order please contact me. Thanks.
#72
Hi Damon! Is there a typical tire flow from Bridgestone? How frequently do
they add more to the pipeline? Is it constant or large batches?
If I wanted my set in mid/late January, for instance, what's the likelihood that:
1 - The tires I got then would be from this first batch anyway, if there was any left?
2 - The tires then would be from a newer shipment?
Thanks,
Joe
they add more to the pipeline? Is it constant or large batches?
If I wanted my set in mid/late January, for instance, what's the likelihood that:
1 - The tires I got then would be from this first batch anyway, if there was any left?
2 - The tires then would be from a newer shipment?
Thanks,
Joe
#73
Hi Damon! Is there a typical tire flow from Bridgestone? How frequently do
they add more to the pipeline? Is it constant or large batches?
If I wanted my set in mid/late January, for instance, what's the likelihood that:
1 - The tires I got then would be from this first batch anyway, if there was any left?
2 - The tires then would be from a newer shipment?
Thanks,
Joe
they add more to the pipeline? Is it constant or large batches?
If I wanted my set in mid/late January, for instance, what's the likelihood that:
1 - The tires I got then would be from this first batch anyway, if there was any left?
2 - The tires then would be from a newer shipment?
Thanks,
Joe
#74
Gotcha.
So, how much would you want down now, in order to guarantee me a 4-tire
set on January 15th? Full price I guess? And if I balked at that my option would
be to keep checking the tirerack site for availability, and if it ever seems low
I have to jump in. Sound right?
So, how much would you want down now, in order to guarantee me a 4-tire
set on January 15th? Full price I guess? And if I balked at that my option would
be to keep checking the tirerack site for availability, and if it ever seems low
I have to jump in. Sound right?
#75
Gotcha.
So, how much would you want down now, in order to guarantee me a 4-tire
set on January 15th? Full price I guess? And if I balked at that my option would
be to keep checking the tirerack site for availability, and if it ever seems low
I have to jump in. Sound right?
So, how much would you want down now, in order to guarantee me a 4-tire
set on January 15th? Full price I guess? And if I balked at that my option would
be to keep checking the tirerack site for availability, and if it ever seems low
I have to jump in. Sound right?