That's what I run on 0.5" wider (and much lighter) wheels which now allows me to rotate the tires properly. (but I haven't yet).evolv wrote:.... I'm hoping to get new wheels and run 205/50-15 all around....
Ya it quickly becomes an Apples to Oranges affair. I read here somewhere that the width of the tire quickly becomes the enemy with regard to efficiency. With this in mind I'll go no larger than bringing the rear 195 size up front. My current tires are not the original, nor are the LLR and I am getting great mi/kwh with a 420 A A rating so my hope is that a well made 600+ A A rated tire will give me similar results. Ill probably run them at like 40-43psi. This RT-43 also comes in a 185 width so if my rear size up front plan tears a hole in the Matrix I'll move them to the back and buy the 185 for up front and get back to life.evolv wrote:I believe it should be quite possible to fit those up front (and feel I remember someone did them on the stock wheels?). Once my fronts are done (new ones came with the car a couple mos ago), I'm hoping to get new wheels and run 205/50-15 all around.
As far as efficiency, I'm guessing the model of tire matters much more than the size. If you were to run the rear size of the oem Ecopias all 'round, then your calculation (if not accurate) is at least relevant. But as soon as you talk about another model tire (eg, one with any actual performance capabilities), then it becomes apples and oranges.
I think people with tire upgrades have reported losses typically in the 10-15% range? Which for me would only mean being less able to skip days for charging.
Can I ask what offset your wheels are for fitting on all 4 corners please?evolv wrote:That's what I run on 0.5" wider (and much lighter) wheels which now allows me to rotate the tires properly. (but I haven't yet).
I really didn't notice a big hit in range. Definitely not 10%. I do notice a slightly sportier feel,, but how do you quantify that?
These are the Konig wheels I have: https://konigwheels.com/wheels/flow-for ... s/dial-in/StEVen wrote:Can I ask what offset your wheels are for fitting on all 4 corners please?
This will be about a 3% increase in overall diameter. Width is the same at 185 so this will be a great test. Your speedo will read about 2mph faster so keep that in mind. Keep us posted.TheLondonBroiler wrote:I'm in desperate need of front tires (if hydroplaning were an Olympic sport, I'd have taken gold in the rain the other day). Someone has a set of 185/60/15 Michelin Defenders at a good price on craigslist locally, and being a supreme cheapo, I'll probably take the plunge. Should be interesting, I'll post observations I feel are worthy. I plan on leaving the rear ecopias alone. Somehow they still have all the tread