

| Subject: | RE: Lighter tyres for lighter steering? |
| From: | mdstockr |
| Date: | Wed, 26 Feb 97 06:17:57 |
Lionel, I don't see how changing you tires will have an affect on your steering. In a previous message we where discussing the use of 205/70R14 tires vs. 185R14. The 205 mm wide tire will increase steering loads because of the torque required to turn the tire. The contact patch of a 205 mm wide tire is >10% wider than a 185 mm tire. Therefore, the torque required to turn the 205 mm tire will be about 10% higher than the 185 mm. A 205/70R14 tire is heavier than a comparable 185R14 tire. Most of this weight is around the circumference of the tire. While spinning, the gyroscopic effects of the 205/70R14 tire will be greater than the 185R14 tire, thereby resisting changes in direction more and increasing steering loads at speed. Lionel, you can't go to a smaller tire since you are already using 185R14's. At best you might be able to go to a slightly lighter tire by buying tires with less reinforcement, but the effects would probably be negligible. Also, your handling response will be reduced. I don't recommend a change in tires. The heavier steering effort is probably due to either a design change in the steering and/or your steering has some worn components. To answer your other questions, see my posting titled "RE: more on tires/pressures" dated 25 Feb 97. --- On Tue, 25 Feb 1997 20:42:09 -0600 Lionel Tun <lionel@ark.prestel.co.uk> wrote: >My 1982 aircooled bus used to have such light steering that people thought >it had power. Now the steering on my 1984 Caravelle GL is a fair effort. >This tyre talk makes me wonder whether changing the tyres may lighten the >steering. Is this true? My tyres say: 185 R14 C, 102/100, 65 psi max, max >single load 1873 lbs. Label says Southern. The other front one says almost >the same thing except label is Firestone, load is 1875 lbs and it also says >P 8 PR. I wonder where I can find out what all this means. > >1. Can I change to a lighter tyre or a better brand? >2. With a max of 65 psi, can I pump up a bit higher - I've got it on about >42 at the moment? The handbook says 35 front and 47 rear, the door sticker >says 36 front and 48 rear. I would never be taking the tyres to anywhere >near their limits of load, acceleration or speed. > >Lionel Tun >1984 Caravelle GL, 183k miles >lionel@ark.prestel.co.uk > -----------------End of Original Message----------------- ________________________________________________ Michael Stocker <mdstockr@neo.lrun.com> North Canton, Ohio, USA Time: 6:17:57 AM LiMBO / GASS Date: 2/26/97 1989 Audi 90 Quattro Wanted: Nice 1968->? bus or Westi Previous VW's: '66-T3, '67-T1 & '70-T2 Westi ________________________________________________
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