HHR SS - Talk to me about 225/45 vs 245/40
#1
HHR SS - Talk to me about 225/45 vs 245/40
Need to buy new tires soon, the factory tires are on the edge of needing replacement. I am not really impressed with the factory tires, right now crazy loud road noise, granted because they are low tread but I still don't like them.
My 215 General Altimax Artic winter tires have WAY better dry traction, and are soo much smoother/quiter.
Soo, help me decide between 225/45 or 245/40. All the 245/40s I've seen online say to mount on rims 8-9" but I know many people on here have mounted 245s on the factory SS wheels, no issues I assume? Would I lose any MPG going to a tire that has a 1" larger contact patch?
My 215 General Altimax Artic winter tires have WAY better dry traction, and are soo much smoother/quiter.
Soo, help me decide between 225/45 or 245/40. All the 245/40s I've seen online say to mount on rims 8-9" but I know many people on here have mounted 245s on the factory SS wheels, no issues I assume? Would I lose any MPG going to a tire that has a 1" larger contact patch?
#4
OP: A couple things. Those old OEM tires are loud largely BECAUSE they are worn down. I have the same problem. I wouldn't recommend the same tire again, but the size isn't bad.
And, going wider will cost you some MPG for basically the reason you stated (technically, rolling resistance, which is a function of contact patch). The difference from a 205 to a 225 was around 5% on my last car, as best I could tell. So those are some tradeoffs, but wider will also give you better cornering capability, and a different (better?) look. They also seem to be more expensive, too...
And, going wider will cost you some MPG for basically the reason you stated (technically, rolling resistance, which is a function of contact patch). The difference from a 205 to a 225 was around 5% on my last car, as best I could tell. So those are some tradeoffs, but wider will also give you better cornering capability, and a different (better?) look. They also seem to be more expensive, too...
#5
Well the tires I am looking at "incorporates APIs environmentally friendly Eco-Safe technology which reduces rolling resistance, improves fuel mileage and wet grip. "
Also 245/40 is only .200" shorter than factory, and I am willing to bet my bald stockers have lost .400" from the orig 25.97" so that is not a concern.
Possible to lose a bit of MPG (I really hope not), but I am hoping to gain a ton of traction, as I hope to do more modding shortly
Also 245/40 is only .200" shorter than factory, and I am willing to bet my bald stockers have lost .400" from the orig 25.97" so that is not a concern.
Possible to lose a bit of MPG (I really hope not), but I am hoping to gain a ton of traction, as I hope to do more modding shortly
#6
I've ran 4 different sizes on mine, the original 215/55 16, 225/40 18 that were on the Cobalt wheels when I bought them. Then 225/45 and currently 245/40. Calculating the speedo differance, my mileage didn't change at all. I've traveled the same way to work with all four different tires and get 26-27 with each tank if it's only to work and back.
#7
Glad to see a size discussion. I, too, was wondering how wide we could go on stock SS rims before things start to rub. I'd love to get 245s on for a little extra grip, and it's good to know the /40 is a good height.
Basically validates my assumptions. Went with Hankook Ventus V4s last time, which have done well; but were a little light on wet grip compared to my old Eagle GTs(but had like double the life). Thinking I might try Continental Extreme Contact DWS this go-round. They are rated about the same life expectancy as the ventus, but sounds like they might be a little grippier in the wet
Basically validates my assumptions. Went with Hankook Ventus V4s last time, which have done well; but were a little light on wet grip compared to my old Eagle GTs(but had like double the life). Thinking I might try Continental Extreme Contact DWS this go-round. They are rated about the same life expectancy as the ventus, but sounds like they might be a little grippier in the wet
#8
but were a little light on wet grip compared to my old Eagle GTs(but had like double the life). Thinking I might try Continental Extreme Contact DWS this go-round. They are rated about the same life expectancy as the ventus, but sounds like they might be a little grippier in the wet