Taching at Highway speed with new 245's

[kj924]

Before the lift and tires, my tach was about 1600-1800 rpm. Now this is a shot at 110 km/h. Speedo may have to be re-calibrated.

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[beartard]

I understand it's nothing for a dealer to reprogram your system for larger tires.

And dude, don't take pics going that fast
Wait, I live in Atlanta; it's impossible to go that fast in the first place.

 

[sevenhelmet]

Whoa, your speedometer freaked me out. I thought you were doing 114 MPH at just over 2000RPM there for a minute. That would have been quite impressive

 

[JeepJeepster]

My tach hits right at 2k at 70mph with 245/70 tires.

Around 1800-1850 at 60mph.

 

[kj924]

I wish that were true sevenhelmet.

 

[jeepkj02]

I understand it's nothing for a dealer to reprogram your system for larger tires.

And dude, don't take pics going that fast
Wait, I live in Atlanta; it's impossible to go that fast in the first place.

That only about 70mph. At 70 with 235/70 i'm doing about 2300-2400 rpms.

 

[Dave]

I like those km speedos....always seems like you're flying.......must be a type 33.......hehe

Ok., I am at about 2,200rpm with 235/65/17's....and 2,000 rpm at 65.

And I have heard that the dealer can re-calibrate your speedo also. I wonder what they will charge for that??

Dave

 

[JeepJeepster]

Pretty sure they change the revs per mile for the tire.

Jeepkj02, remember that you have the 45rfe with a lower 4th gear.

 

[Atrus]

according to my GPS, I am about 3mph slow at 45mph with my 245/70's. Wonder how far off it was when stock?

 

[LibertyOrDeath]

according to my GPS, I am about 3mph slow at 45mph with my 245/70's. Wonder how far off it was when stock?

I was about 3-5 MPH slow with stock 225/75R16's

I am still 1-2 MPH slow with 245/75R16's

My GPS is in sync with the radar speed limit sign things, so I assume that my GPS is more accurate than my speedometer