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Old 24th March 2007, 14:42   #1
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Default Ground Clearance

Getz GLS has tyre specs as 175/70R13 and GLX (ABS+ ALLOYs) has 175/65R14. Does this mean that GLX has higher ground clearance of 0.5 inch?
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Old 24th March 2007, 14:53   #2
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Originally Posted by cartech View Post
Getz GLS has tyre specs as 175/70R13 and GLX (ABS+ ALLOYs) has 175/65R14. Does this mean that GLX has higher ground clearance of 0.5 inch?
70 as in 175/70 R13 is the section height of the tyre so when you choose 65 as in 175/65 R14, its lower profile which means the ground clearance reduces.

I just used logic to respond, i could be wrong.
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Old 24th March 2007, 15:07   #3
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Comparison of running radius of tyres

1. 175/70-13

radius of rim = 6.5x 25.4 = 165.1mm
sidewall of tyre = 0.70x 175 = 122.5mm

Running radius = radius of rim + sidewall hieght = 165.1 + 122.5 = 287.6

2. 175/65-14

radius of rim = 7x 25.4 = 177.8mm
sidewall of tyre = 0.65x175 =113.75mm

Running radius = radius of rim + sidewall hieght = 177.8 + 113.75 = 291.55


Difference in running radius of both tyres is the difference in ground clearance

175/65-14 will provide u with extra 4mm ground clearance

Last edited by kpzen : 24th March 2007 at 15:13.
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Old 24th March 2007, 15:10   #4
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Good one Kpzen. how did you derive those figures of radius of rims and sidewall of tyres?
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Old 24th March 2007, 15:16   #5
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Originally Posted by mobike008 View Post
Good one Kpzen. how did you derive those figures of radius of rims and sidewall of tyres?
175/70-13

175 - section width of the tyre
70 - profile of the tyre(%age)
13 - rim size

sidewall of the tyre = (70/100) x 175 =122.5mm
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Old 24th March 2007, 15:38   #6
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Quote:
Originally Posted by mobike008 View Post
Good one Kpzen. how did you derive those figures of radius of rims and sidewall of tyres?
kpzen, you're absolutely right.

mobike008, this is how it's computed!



So, the difference is 3.95 mm, which is IMHO, insignificant.
10,000 km of tire wear will shave off 2-3 mm of tread anyway!

Ram

[also ref: my post]
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Old 24th March 2007, 15:42   #7
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KPZEN and RAM thanks for clarification. My doubts cleared.
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Old 24th March 2007, 19:49   #8
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Quote:
Originally Posted by kpzen View Post
175/70-13

175 - section width of the tyre
70 - profile of the tyre(%age)
13 - rim size

sidewall of the tyre = (70/100) x 175 =122.5mm
Fundoo explaination. Now I dont have to refer to the tyre bible everytime i need to calculate this
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Old 10th December 2007, 20:13   #9
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Can we increase the ground clearence of a car ? if yes how ? car in question is aveo , like to have the ground clearance which sx4 enjoys .
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Old 10th December 2007, 20:42   #10
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Originally Posted by madaboutCARS View Post
Can we increase the ground clearence of a car ? if yes how ? car in question is aveo , like to have the ground clearance which sx4 enjoys .
Why do u want to increase the GC of Aveo which has good enough GC for our Indian roads??
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Old 11th December 2007, 05:40   #11
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Also try these threads :

http://www.team-bhp.com/forum/techni...-measured.html (Optimum ground clearance of a Car? & how it is measured...)

http://www.team-bhp.com/forum/modifi...clearance.html

cya
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Old 11th December 2007, 10:30   #12
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Quote:
Originally Posted by kpzen View Post
Comparison of running radius of tyres

1. 175/70-13

radius of rim = 6.5x 25.4 = 165.1mm
sidewall of tyre = 0.70x 175 = 122.5mm
I am sorry, but i still didnt get it.

175 is the section width.
70% is the profile,
13 is the rim radius.

so then
"radius of rim = 6.5x 25.4 = 165.1mm"
is what radius and how is this getting calculated?

Appreciate explaining it a little more

Regards,
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Old 11th December 2007, 10:49   #13
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Quote:
Originally Posted by amohit View Post
so then
"radius of rim = 6.5x 25.4 = 165.1mm"
is what radius and how is this getting calculated?
Not sure if i understand your doubt exactly, but...

6.5 (is half of 13", which is the rim diameter)
25.4 (is the multiplication to convert inches to mm)

the resultant answer (165.1mm) is the radius of only the wheel (without the tyre added to it)

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Old 11th December 2007, 10:55   #14
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oh got it...earlier it was written 13 as radius...so got confused.

Regards,
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Old 11th December 2007, 11:48   #15
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Quote:
Originally Posted by amohit View Post
13 is the rim radius.
13" is the rim diameter. Rest i think u have understood.
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