Keep 35's or return to 33's?
01-13-2011, 08:04 PM
#11
JK Freak
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If you didn't reflash your computer for the 35" tires, then the computer will indicate a lower figure, but you are actually traveling 6% further than the speedo says, so your mpg is 6% higher than indicated, which would be about 11.5. If you keep the 35s and go offroad, install c-gussets as they are prone to bending with 35" tires. I wouldn't worry about the ball joints. They are pretty poor quality and will go out sooner or later anyway.
01-13-2011, 08:09 PM
#12
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What PSI are you running in the 35's? That could be a factor in the "rougher ride" feel that you're getting. Generally, the larger the tire, the lower PSI you should be running for a smooth ride.
*edit* - just saw that you were going with 30 PSI. If you can find a clear area of street after that snow clears, try a chalk test with them to see what you should go with.
*edit* - just saw that you were going with 30 PSI. If you can find a clear area of street after that snow clears, try a chalk test with them to see what you should go with.
Last edited by Merlin4979; 01-13-2011 at 08:11 PM.
01-13-2011, 08:14 PM
#13
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Just checked again and they're at 29. Don't get me wrong, they're not unbearable. I'm driving across Canada this summer and since I just put these on and haven't paid for them yet or sold my 33's I need to make my mind up sooner than later whether I'm gonna keep these or run my 33's.
01-13-2011, 09:56 PM
#14
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I've had the 35's on for a day. The actual height of my 33" (285/70r17) duratracs was 31.75" at 30 psi. The actual height of the 35's at 30 psi is 33.5". The difference being 1.75". Cut that in half roughly for height difference.
What I've noticed is that my mileage (according to the computer which I know can be flawed) has gone from 18.3 liters per hundred km to 19.7 liters per hundred km or 12.8 mpg to 11.9 mpg In the city (not a big deal).
Since you are doing more "overlander" type stuff, consider that most Land Rovers etc on the long cross-country expeditions rarely run more than 31 and 32 inch tires. Check out the monster meats the guys in this video have!
http://www.youtube.com/watch?v=Jmrg1r2uEKo&feature=related Did you re-flash the tire size with your programmer after the switcheroo? Oops - just saw that you did. About 4 posts beat me after I started typing this!
Last edited by PG-JKU; 01-13-2011 at 10:16 PM.