difference in 17s and 18s

[goosemst]

I have the 18s and would like to swap for some off road 17's. Is it a simple swap? Would the new rims and tires throw the speedo off? Also I notice a few people on here talk about "smoking" the tires. With my 18s I can get a good bark and thats it, it still takes off like a rocket. Just wondering if the wheel size had anything to do with it.

[goosemst]

Any info from anybody?

[Paulphilly]

Originally Posted by goosemst

I have the 18s and would like to swap for some off road 17's. Is it a simple swap? Would the new rims and tires throw the speedo off? Also I notice a few people on here talk about "smoking" the tires. With my 18s I can get a good bark and thats it, it still takes off like a rocket. Just wondering if the wheel size had anything to do with it.

Yes, it is a simple swap. The difference is in tire size. If you get the 17" wheels (which is what I have), then your tire size is upgraded to 285/70/17. Your speedo will remain true and accurate. As far as smoking the tires, I did it the other night with my 285/70/17's...but, I really dont think the tire size matters. The Titan has so much torque that it will get loose in the rearend if you want it to!
Paul

[MrXpress]

Actually your speedo is probably off by a decent amount from the factory anyways

[greg w]

Turn off your VDC and stomp it again.

[Wake County Titan]

Check here - this is a good tool.

http://www.1010tires.com/tiresizecalculator.asp

[dalt1]

Originally Posted by MrXpress

Actually your speedo is probably off by a decent amount from the factory anyways

My speedo is right on at all speeds according to GPS which is accurate. The odometer is off a bit though. Havent figured out how much though. Anyone know how much the speedo discrepency is?

[jmacougar]

Both tires have the same overall diameter regardless of the wheel size ... it's not going to matter.