P245/60R15 tires. Which would you choose?
Coopers.
And I'm usually on the opposite side of this conversation, but 15x7's with 245/60/15 is just fine. As in, perfectly fine. As in, a 15x7" rim is actually the rim size that the tire manufacturers use as a "measuring rim" for all of the published specifications for a 245/60/15. If a 15x7" is good enough for Cooper and BF Goodrich to use as the their measuring rim, it won't cause you any issues on the street.
And, for those that don't know, a 15x7" is not 7" wide. Outside lip to outside lip, the width is 8". The width where the inner bead of the tire sits is 7". But that 8" of tread all has rim underneath it. And, in the case of the Coopers anyway, the tread width is listed at 7.2". The BFG is listed at 8.3". Both use a 15x7" for the measuring rim. These will be a little hard to read because of their size, but you can go right to TireRack yourself and see.
As long as you stay within the manufacturer's specs you shouldn't have any issues. That's not to say that a wider rim wouldn't give you a little more tread patch or that the narrower rim might change your tire pressure requirements, because there is variation even within the manufacturer's specs. But, it's still in the recommended range, so, the manufacturer would stand behind it. Good enough for me. Technically, both Cooper and BFG still list a 255/60/15 as fitting on a 15x7". The measuring rim for a 255/60/15 is a 15x7.5", and they would be better on a 15x8", but a 15x7" is still within the recommended range even for a 255/60/15.
Coopers.
And I'm usually on the opposite side of this conversation, but 15x7's with 245/60/15 is just fine. As in, perfectly fine. As in, a 15x7" rim is actually the rim size that the tire manufacturers use as a "measuring rim" for all of the published specifications for a 245/60/15. If a 15x7" is good enough for Cooper and BF Goodrich to use as the their measuring rim, it won't cause you any issues on the street.
And, for those that don't know, a 15x7" is not 7" wide. Outside lip to outside lip, the width is 8". The width where the inner bead of the tire sits is 7". But that 8" of tread all has rim underneath it. And, in the case of the Coopers anyway, the tread width is listed at 7.2". The BFG is listed at 8.3". Both use a 15x7" for the measuring rim. These will be a little hard to read because of their size, but you can go right to TireRack yourself and see.
As long as you stay within the manufacturer's specs you shouldn't have any issues. That's not to say that a wider rim wouldn't give you a little more tread patch or that the narrower rim might change your tire pressure requirements, because there is variation even within the manufacturer's specs. But, it's still in the recommended range, so, the manufacturer would stand behind it. Good enough for me. Technically, both Cooper and BFG still list a 255/60/15 as fitting on a 15x7". The measuring rim for a 255/60/15 is a 15x7.5", and they would be better on a 15x8", but a 15x7" is still within the recommended range even for a 255/60/15.
