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I own a 2009 G3 with 17x7 alloy wheels with 225/45 wheels. I'm curious of the benefits of switching to 205/50 tyres. According to tiresize(dot)com, the width makes 9% difference, while the rest of the specs virtually remained the same like the circumference, diameter and sidewall (less than 1% difference).


- Is there much of a difference in weight between a 225/45 and 205/50 tyre?

- Will swapping to the 205/50 increase acceleration and improve performance on steep hills?

- Will 205/50's increase or decrease comfort?

- Which size will be more durable?


Not concerned about tyre costs.


Everything else remains stock besides a K&N air filter.


Cheers.
 

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Depends on the manufacturer. Look up a tire brand and model you like on Tire rack to compare weights.
A difference of + 0.4% in diameter will not be noticeable to the "buttdyno"
Comfort will be affected more by tire construction than the small diameter difference.
Durability is affected more by tread compound. The taller sidewall in theory should be less prone to damage from potholes and the like. Again 0.4% won't make a difference.
 
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