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Old 11-25-2020, 11:49 AM   #1 (permalink)
Vekke
Mechanical engineer
 
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,273

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 24.67 mpg (US)
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Flat tire repair vs weigth savings techiques

We all know extra weigth is not good for MPG. In most cars there are two ways to solve flat tire problem:

Option #1
- Have a spare wheel
- Jack etc needed tools
cons
- adds a lot of weigth 10-30 kg depending on vechicle size
- takes space about 100 liters
- Takes skills and power to replace the tire and open bolts
- Some cases have limited speeds to drive speeds with sparetire
- Takes time for beginner to change the tire -15-60 minutes and you can easily break or car in the process if you dont know what you are doing
Pros
+ Usually can continue driving normally after spare tire is installed.

option #2
- Have a tire seal can which seals and fixes small holes
- Pressure compressor
Cons
- Tire fix foams limited ability to fix tires in cold and if you have a hole to side of tire etc.
- Takes also bit of space
- Seal foams have use before dates, and oem foams are expensive
- Usually messy job
- Tire might leak empty during nigth
- Fix takes time
Pros
+can continue journey if tire holds pressure
+ is pretty lightweigth solution

Option #3
- No tools, sparetire or nothing to fix blownout tires

Cons
- Takes a long time for the road assistance to arrive and tow the car or fix the tire at site
- Is very expensive
Pros
+ Car comes fixed professionally
+ Car is safe to drive after fix
+ LIghtest solution to save weigth and space

Any other options you know?
Some bicycle tires have some expensive glues to put inside tires which in theory fill the hole immediately.

What I know from my own experience is that usually when you are driving you are in a hurry. So when tire is blown your timeplan starts to go bad with all the normal methods.

I would appreciate if you could post here some pictures of your flatout tires and how you fixed the situation, what it cost and how long it took?



Here is my latest mishap. few years old winter tires and screw throug the side which is tricky to fix so it lasts. On that morning had to use other car for the journey. Tried to fix it with can seal no luck with that. Bougth new used set of tires to fix the problem.

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Vesa Tiainen innovation engineer and automotive enthusiast
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