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Fffuuuuuuu!
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Discussion Starter #3 (Edited)
And just found this wheel inertia calculator:

http://www.sixthsphere.com/phpBB3/download/file.php?id=3447&sid=93e12567320c8b9fbb45523f1065240b

...although I've only had a quick look, so not sure it's any good - it's too late and I need some sleep :sleeps:

EDIT - If I compare my Maglines to my old S-Spokes, with the different tyre sizes, but the same tyre weight (can't find a definitive answer on that), then it says I'm using 17.9lbs less of torque, to turn my wheels. Ooo! :blink:
 

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17,320 Posts
This is amazing.... so by changing from 215/40/17 TD 1.2's at 7.2 kg per wheel to Velox PG-Rev10's at 5.2 kg per wheel using the same tyre I can pick up an average of 10 bhp or 10 lbs ft torque!!!

Paul is gonna cream himself over all this data!

Again, great find!
 

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56 Posts
Now that would be really useful.
I'm running Vredestein Ultrac's (not Sessanta) at the moment. Vredestein announced a new Ultrac Cento a short while ago which they claim is 20% lighter :eek:hmy:

How do you find the Ultrac's??

I'm thinking of getting some for my MCS but I don't want anything that's amazingly grippy else I'll lose the adjustability/slideabilty of the car.
 
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