Toyota Tundra Forum

Somebody owes me a donut! =)

Personally I wouldn't use it but you should be fine with that as a spare on the front just as long as you don't have to stomp on the brakes...? So I would suggest being very careful in 2WD only and as long as it's not on the rear axle. So I guess it depends whether you want to carry a pair of jack stands in case a rear goes flat, if you are on the road you could also call for roadside assistance.

All 3 OE tires are 32" mathematically, not 31". A 305/55/20 is 33.2" tall or a little over 1" taller than OE. How you wound up with a 29" spare instead of a 32" is weird.

__________________
RCSB 5.7L SR5...........Yep, it's gotta HEMI

Sometimes the claimed size is not the actual size.

__________________
Any questions about truck mods I have done need to be asked in the forums. Don't send me a private message about mods cause I probably won't answer that PM unless there is money involved.

2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, 3M clear bra, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI, Llumar tint, CompuStar Pro alarm, ProComp 6066 20" wheels, Cooper Zeon LTZ 275/60/20 tires, OME HD coilover lift, Firestone helper air bags, 55w reverse lights, stereo cable lock, Tekonsha P3 brake controller, colormatched exterior parts (de-chromed truck), eDead sound proofing, CDT Audio speakers, Custom made speaker brackets, Weathertech floor mats
All mod descriptions and pictures © 2007-2009 by Toxarch. They may be copied only for personal use and the mods may be done for non-profit only.

................but very close with todays metric sized tires.

Yes, still close.

I have the OEM 20's, had a flat a few months back, put the 18" spare on, and as I recall, it appears to be darned close to the same height.

__________________

2007 Tundra Limited Double Cab 4x4 Super White
Volant CAI
Pioneer AVIC Z-2 (hard drive upgrade to AVIC Z-3)
Key FOB Tailgate Lock (courtesy of Toxarch)
OEM back-up camera w/flip down monitor microswitch mod
Sirius Satellite Radio
WeatherTech Floor Liners
20" OEM alloy wheels
Line-X Bed liner
UWS Black Powdercoat Low Profile Toolbox
DU-HA underseat storage unit
JC Whitney Black Nerf Bars
Lund Interceptor II Bug Shield
Tekonsha Voyager Brake Controller

Of the 3 OEM sizes, ironically the 20" is the shortest........only by a few hundredths though.

I have used a 17 inch spare on my old truck and it had 20's the tire and wheel together are comparable to the 20 with a lower profile tire, i wouldnt see any problem using a 18 and a 20 if your worried about it dont put it on a drive wheel, throw it up front.

It's not a good idea to drive with different sized tires - traction control or not.