Did Search , Question 06 trd wheels

891 Views 4 Replies 4 Participants Last post by planohog, Feb 3, 2007

planohog

Discussion Starter · Feb 3, 2007

2006 taco AC with trd offroad and towing. What are the max tire sizes I can go with
using stock rims. ( stock bfg at 265/70/16 )

My goal is deep sand

The wider tread creates less stress to the surface tension of the strata of sand (as expressed in kN/m2) and the vehicle will not sink as easily. The smoother and wider a tire is, the better it will perform in sand, as the width creates flotation and the smoother tread displaces less sand under (horizontal) acceleration (shearing force).

I will have about 2" lift if required by tires.

how wide can I go

Yes, Searched and searched lots of places, I cant find what i am after

thanks in advance

-t

Great Ref material here: http://www.expeditionswest.com/research/white_papers/tire_selection_rev1.html

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amp2oo1

· #2 · Feb 3, 2007

planohog said:
What are the max tire sizes I can go with
using stock rims.

You didnt search very hard. max size on stock rims with no rubbing is 265/75r16

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TucsonTRD

· #3 · Feb 3, 2007

stock rims will limit the width of tire you can use. otherwise, you'll rub on the uca. best way to use wider tires is to change wheels that have the appropriate backspacing

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Adventure North

· #4 · Feb 3, 2007 (Edited)

I would re-read Scott's position. Personally if you want to stick with the stock rims I would choose a very tall tire like a 255/85 16. Reason is you get that added floatation from the long contact patch while not having to worry about going to aftermarket rims to prevent rubbing on the control arms and you won't have to worry about rubbing on the body mount. Mitsubishi uses a 235/85 16 on their cars that race in the Dakar rally, and the rally is full of really deep sand and dunes, they have also won the race 6 years in a row, and seem to make easy work of the dunes.

As quoted from Sahara Overland, a Route and Planning Guide by Chris Scott (2004, ISBN: 1-873756-76-3):

"...Note that it's the diameter or height of the tyres that makes the difference in sand, and not, as many imagine the width... For the desert, you want tyres with a high aspect ratio of around 80 because this represents a taller sidewall so corresponds to added ground clearance when firm, and a longer contact area when deflated"
Traction in soft surfaces: It is a common misconception that airing down a tire for off-road traction only makes the tire contact patch wider. That is not the case. In fact, only 20% of the increased contact comes from the width. 80% of the increased contact patch comes from the tread patch becoming longer. A tall, narrow tire allows for a very long contact patch when aired down. That, coupled with the minimal frontal resistance (area), negates much of the downside to narrow tires in flotation situations. The taller tire allows for a long contact patch and still maintains good ground clearance.

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planohog

Discussion Starter · #5 · Feb 3, 2007

Adventure North said:
I would re-read Scott's position. Personally if you want to stick with the stock rims I would choose a very tall tire like a 255/85 16. Reason is you get that added floatation from the long contact patch while not having to worry about going to aftermarket rims to prevent rubbing on the control arms and you won't have to worry about rubbing on the body mount. Mitsubishi uses a 235/85 16 on their cars that race in the Dakar rally, and the rally is full of really deep sand and dunes, they have also won the race 6 years in a row, and seem to make easy work of the dunes.

I saw that and the light did not come on till i read read it again. thanks.

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