Proper tire size for 20" rims

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Proper tire size for 20" rims

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Proper tire size for 20" rims - 7/13/2008 7:44:42 AM

Kendrick

Posts: 11
Joined: 7/11/2008
Status: offline

Hello,

Anyone here running on 20" rims on the H3? What would be the proper tire size for the H3 on 20 inchers? Is it 305/50 20?

thanks!
Ken

Post #: 1

RE: Proper tire size for 20" rims - 7/13/2008 9:08:51 AM

Bitdriver

Posts: 75
Joined: 6/20/2008
Status: offline

http://www.miata.net/garage/tirecalc.html

A nice little utility for getting as close as you can to stock height/etc for speedo calcs :)

_____________________________

2006 Hummer H2 SUT. Pewter/Ebony Leather int.
Mods to date: Marker light covers. Rear Tonneau Cover, Hyperpac Performance Tuner, K&N 63-3037 CAI

Next Up: Vent Visors, Custom Dash mods (by me!), Exhaust system, front mini grille

(in reply to Kendrick)

Post #: 2

RE: Proper tire size for 20" rims - 7/13/2008 9:28:23 AM

sjr21805

Posts: 112
Joined: 1/23/2007
From: L-Town Florida
Status: offline

mine are LT275/65R20

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(in reply to Bitdriver)

Post #: 3

RE: Proper tire size for 20" rims - 7/13/2008 12:55:53 PM

Kendrick

Posts: 11
Joined: 7/11/2008
Status: offline

Thanks! that tire calculator is exactly what I wanted to find.

(in reply to sjr21805)

Post #: 4

RE: Proper tire size for 20" rims - 7/14/2008 10:55:49 AM

D VADER

Posts: 1197
Joined: 5/21/2007
Status: offline

275/65/20 right? I may go with 256/65/20. Its still the right diameter but a smaller foot print(width). Maybe I''ll save some gas.

_____________________________

2007 H3X w/lux pkg, black on black, Starship from the "Dark Side"
Central Ohio

(in reply to Kendrick)

Post #: 5

RE: Proper tire size for 20" rims - 7/14/2008 11:07:14 AM

Kendrick

Posts: 11
Joined: 7/11/2008
Status: offline

According to the tire calculator, the 275/55 20 would be a better size as it is only 1.1% slow in the speedo reading.

If you go 275/65 20, that''s 3% too slow. So speedo reading 60mph you are really going 64.3mph

(in reply to D VADER)

Post #: 6

RE: Proper tire size for 20" rims - 7/14/2008 1:17:22 PM

Bitdriver

Posts: 75
Joined: 6/20/2008
Status: offline

Keep in mind too Kendrick, that you CAN recalibrate the speedo with programmers (Hypertech etc).

_____________________________

2006 Hummer H2 SUT. Pewter/Ebony Leather int.
Mods to date: Marker light covers. Rear Tonneau Cover, Hyperpac Performance Tuner, K&N 63-3037 CAI

Next Up: Vent Visors, Custom Dash mods (by me!), Exhaust system, front mini grille

(in reply to Kendrick)

Post #: 7