overall height of 109 truck cab - Defender Source
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  #1  
Old July 31st, 2011, 04:56 PM
Dr Benway
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overall height of 109 truck cab

greetings

I've been trying to find the overall [clearance] height of a sIIa 109 truck cab.

Ive found some LR manuals on line and they give it as 11cm [over 4"] more than an 88 truck cab?

1.95m vs 2.06m

is that correct? if so, what makes the 11cm difference?

can someone measure their 109 truck cab please?

1.95m clears my garage door, 2.06m only clears my garage door at speed.

thanks!
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  #2  
Old August 1st, 2011, 01:26 AM
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Daniel Rogers
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I cant answer with any authority but I believe the difference would be because of the different types of rear springs. I think Teriann has info on the different spring rates on her site somewhere (iirc). It would make sense that a truck with stiffer springs, with the weight of the hard top gone and replaced with a truck cab would sit higher.

Daniel
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Old August 1st, 2011, 01:34 AM
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Stock 88" came with ~28in tires and 109s came with ~32in tires. There is 2in. Rest is in the springs.
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Old August 1st, 2011, 07:49 AM
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thanks all, for the replies

attached here is the specs page from the sIIa owners manual


thanks!
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Old August 1st, 2011, 12:50 PM
The Dro
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Haydn,

The data you will find is almost useless...

I say this because, the overall height will be dictated by the tires and saggy/upgraded suspension components used.

My IIA had 225/75-15 (about 28-1/4" tall) on it and it went up about 3-1/2" when I got the 235/85-16 (about 31-3/4" tall).

Hope this helps.
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Old August 1st, 2011, 01:09 PM
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Quote:
Originally Posted by rrc.swb View Post
Haydn,

The data you will find is almost useless...

I say this because, the overall height will be dictated by the tires and saggy/upgraded suspension components used.

My IIA had 225/75-15 (about 28-1/4" tall) on it and it went up about 3-1/2" when I got the 235/85-16 (about 31-3/4" tall).

Hope this helps.
That is mathamatically impossible. You only gain half the tire height difference in lift as only half the tire is under the axle.
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Old August 1st, 2011, 04:33 PM
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Pedro ...Pedro..... repeat after me PI = 3.1416 *LMAO*

Radius = D / 2 or C/2 n or square root of A / n

Damn engineers


where:
D is the diameter of the circle
where:
C is the circumference of the circle
π is Pi, approximately 3.1416
where:
A is the area of the circle
π is Pi, approximately 3.1416
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Old August 1st, 2011, 06:49 PM
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You guys are correct... I chose the wrong wording. Meant to say the tires have a 3-1/2" difference in height.

But my point still the same... Over all height is very difficult to guess from books.
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