Quote:
Originally Posted by Chris-Massachusetts
Thank you CapriRacer I will pick the larger tire!
I was using the tire rack web site to establish tire diameters as near to (or above) the 25.1 stock diameter.
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Always compare tires based on revs/mile, on my car a better quality set of 185's actually had the same revs/mile as the cheap 195 tires the came with the car.
Quote:
Originally Posted by Chris-Massachusetts
I am not sure if the diameter is a loaded diameter or unloaded comparison. I am also not sure how much a change from 24.5 or 24.7 to 25.1 will have, but I will be going the right way.
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Load usually affects under 1%, one other benefit of going to a larger tire is you can buy one that has the lowest load rating for the size (which is usally LRR) so long as your cars loaded weight does not overload your intended tire,
Quote:
Originally Posted by Chris-Massachusetts
I had a question for CapriRacer about proper tire inflation. I believe you explained this to me before. (I will repeat this question at your site, perhaps it's there and I missed it.)
The question is establishing the tire manufacturers recommended PSI for a given load on a specific tire.
I understand this is a loaded question (No pun intended) because of manufacturer margins for safety factor likely vary and not to forget liability.
But if I am changing to tires with a different load rating, I want to know how to establish the proper tire inflation.
I am sure that most people here have noticed that a 3 to 7 PSI change can drastically change MPG. What I am interested in is the small change that can yield the most benefit with the least loss of traction or wear.
Thanks again for the help Tires are a big purchase for me an once on I am married to them (for better or worse)
Chris
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Wet traction and traction on clean ice tend to be improved with higher pressures;
sand, leaves, wet snow, mud are handled best at lower pressures.
Wider tires can cause you to have less traction if your car doesn't weigh enough to cut into slush/snow, my insight flops all over the road when it had big wheels on, narrower tires made it track much better in the winter months.
Cheers
Ryan