how do I know what size torsion ars I have

[lynn911]

Dumb question ,after searching

I am trying to identify what size my rear torsion bars are on my 1985 Carrera

Color Black

circumference 7.5 cm

two white marks on them and two green marks on the length of them

may be a dumb question but i would appreciate any help on this

[vash]

75mm/PI=23-24mm?

if you can measure circumference..can't you simply measure the diameter? sorry, i am arse deep into a huge spreadsheet, not seeing or thinking straight.

[Tim L]

the math = 23.7 mm

[moneymanager]

Measure. A 23mm bar is 23mm in diameter.

[MattKellett]

If you don't have any calipers and only a tape measure or ruler, take 2 objects (sticks) and place them either side of the bar and then measure the distance between the 2 with your ruler - make sure objects are parallel.

[lynn911]

Thank you all for your help

I guess it time to start looking for stiffer T bars.

I appreciate the help as I did not know that it was based on he diameter.

Am I correct in assuming from my reading that

a 27/28 rear

and 22 front

would be a good all round street plus DE combination
The car is 85 sunroof carrera

AC delete
CTR fiber glass bumpers Bilstiens all round

Thanks all Chris

[Bill Verburg]

sounds to me like you have stock '85 18.8mm & 24.1mm t-bars

[lynn911]

I guess I will just lower it to Euro and start saving for stiffer bars

[911st]

Lynn,

If you have it apart it is a good idea to freshen the bushings and do what you want to as the cost of alignment and reseting the corner balance can be expensive.

22/29 is a good sport combo for an 85 w HD/HD or HD ft/Sport shocks rear. New shocks lift the car.

Solid torsion bars are not very expensive. Something like $600. Shocks about the same. Plus bushings and about $1000 for a good corner balance, alignment, and fine tuning of the ride height.