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    Thread: Chevrolet Optra Magnum Alloy/Tyre Upgrade Options.

    1. #1
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      Chevrolet Optra Magnum Alloy/Tyre Upgrade Options.

      Chevy Optra Magnum comes factory fitted with 195/60, R15. Please use this thread to discuss the options and aspects of the tyre/alloy for Optra Magnum.


      Stock Size - 195/60, R15.

      Upgrade Options:


      1. 205/60, R15 - Error of 1.95%. So when your Speedo reads 70 mph, you're actually traveling at 71.36 mph
      2. 215/55, R15 - Error of 0.41%. Best upgrade size with minimum error%. So when your Speedo reads 70 mph, you're actually traveling at 70.29 mph
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      Try 205/55/R15. I guess this is the best upsize for this car. I use Maxxis MA-Z1 of this size on stock alloys in my magnum and it works like a charm.
      chevy madness. Now a Harley too! :P

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      Me too using Maxxis MA-Z1 (205/55/15) on the magnum with stock alloys

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      Hi Docz

      How about the ground clearance after you have changed to this spec?

      With the stock 195/60 the sidewall measurement should be 117mm and when changes to 205/55 it would be 112.75mm. So has this made any difference to the ride or handling? the GC is for sure is going to come down with 205/55.

      M also in the thought process of upgrading my rubber; and has been searching for a good opinion on which one would be a better fit for the magnum.

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      Quote Originally Posted by Torquey View Post
      With the stock 195/60 the sidewall measurement should be 117mm and when changes to 205/55 it would be 112.75mm. So has this made any difference to the ride or handling? the GC is for sure is going to come down with 205/55.
      IMO, GC change will be too low to observe any significant difference.
      Stay Sedate

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      Quote Originally Posted by Torquey View Post
      M also in the thought process of upgrading my rubber; and has been searching for a good opinion on which one would be a better fit for the magnum.
      Get 205/55/R15. Perfect fit.
      chevy madness. Now a Harley too! :P

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      I had sent a note on Autonut's ownership thread; i will continue here now.

      Autonut, how about the tyre noise for Apollo's 205/55/15 rubber? any significant change being noticed while cornering? and then braking and steering?

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      Tyre roll noise depends on the pattern of thread... My current Tyres are MA-Z1s and are a likely to get a biz noisy later. Not yet.
      Maxxis has good road grip and so u get more confidence during hard cornering.
      Braking is one interesting factor that improved a lot when loaded with maxxis.
      chevy madness. Now a Harley too! :P

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      Quote Originally Posted by autonut View Post
      Maxxis has good road grip and so u get more confidence during hard cornering.
      Braking is one interesting factor that improved a lot when loaded with maxxis.
      Acelers were not good with grip and braking? I mean, i do know how the stock 195/60 accelers perform, not that good i should say. Initially there was some howling noice at high speeds, from the tyres; but gradually it was mitigated.

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      In my experience aceleres were good except its life. It started giving roll noises and punctures after 25k kms... But that cud be due to my rough driving. Grip and stability wise it was good.
      chevy madness. Now a Harley too! :P

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