SwollenMonkey16
Senior Member
I'm running these 305s now (ridge grapplers) do you guys think its that big of a difference to where I need to get a Speedo calibrator?
305/55r20
- Thread starter SwollenMonkey16
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bhonshell37
Senior Member
What size were you running?
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SwollenMonkey16
Senior Member
original tires were 275/70R18
bhonshell37
Senior Member
Yes, a speedometer calibration is needed for proper function
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SwollenMonkey16
Senior Member
Any recommendations?
bhonshell37
Senior Member
A reputable shop can calibrate your Ram
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SwollenMonkey16
Senior Member
What do you think is a good price to pay for that? Can the dealership do it?
bhonshell37
Senior Member
Sure a dealership can do calibration and they may charge more. Call around and get some quotes. Some programmers can calibrate as well
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SwollenMonkey16
Senior Member
Thanks bhonshell37
And fanman69 yea I already read that before I posted this. Just wasn't sure if moving up a 1/4 inch in tire size would need recalibration and I really don't want to buy a recalibrator tool
And fanman69 yea I already read that before I posted this. Just wasn't sure if moving up a 1/4 inch in tire size would need recalibration and I really don't want to buy a recalibrator tool
G. Mcpherson
Senior Member
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- Jan 14, 2017
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- 2023 Ram 2500 CC SB Tradesman
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Look at Tiresize.com There is a comparison link that will show you the size comparisons and give you the difference in speed.
G. Mcpherson
Senior Member
- Joined
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Both tires= 33.2 Circum.=104.1 104.3 Revs/Mile= 626 627. Shows no speedometer change at all.
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SwollenMonkey16
Senior Member
Thanks G. Mcpherson that's what I was originally thinking bc I chose the 305s for that specific reason and you just confirmed it for me.
Dmopar74
Senior Member
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- Hemi 6.4
Drive it.
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