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Showing results for tags 'upsize'.
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Hi Folks, I own a Vitz 2017 1000cc (yeah the boring KSP130). Wanted to upsize the wheels from stock 14 to 15. Hence, went searching for a good alloy wheel set, and managed to find a set (~ 5kg each). However, was hit by a different challenge. The recommended wheel size to upsize is 175/60 R15, which has a 0.9% increase in the overall diameter. Unfortunately this size is quite rare in SL, and I was not able to find a set till now. However, 175/65 R15 is widely available in many brands. But, the change of the overall diameter is 3.9% which exceeds the recommended tolerance level which is 3% as I read. I know upsizing will effect fuel figures, that I do not mind a lot. Also the speedometer and odo meter reading glitches are not huge concerns for me. However, being a Vitz 1.0L the acceleration is pretty average now as well, therefore putting additional weight and slowing down the acceleration further is something I would like to avoid if possible. Couple of questions: 1. If I manage to find a lightweight set of 175/65 R15 tires with low rolling resistance, where the combination of the wheel + tyre weight is approximately similar to what is there currently, would it stil feel slow in acceleration? Anyone who has prior experience? 2. Apart from the fuel consumption, speedometer + odometer readings, any other potential issues which can arise from going above 3% of original diameter? Thank you.