If you are using Swift LXI/LDI or VXI/VDI variants, then the stock tyre size would be 165/80 R14. Plausible upsizes to this are 175/80 R14 and 195/ 70 R14. If you go for 195 then you might experience bumpy ride quality, heavier steering and a slight drop in the fuel efficiency.
In case you are using ZXI/ZDI variants, then the stock tyre size is 185/65 R15 and plausible upsize would be 195/65 R15.
You do not have to make any upgrades to the suspension system. General benefits of upsize include improved road grip and efficient braking.
yossarian snoopervia Google
Hi I've a swift vxi 2014 model. Oem tyre size is 165/80/r14. Is it possible to upgrade to 185/70/r14. Will there be any safety issues and downside if any. Also does it affect the speedo and odo accuracy. Any help would be greatly appreciated. Thanks
Yes, you can very well upsize to tyres of size 185/70 R14. This will help your vehicle get better road grip and more efficient braking. This is very beneficail if you go over long highway drives or are an aggressive driver.
However, the ride quality could get a little bumpy and the odometer reading would go slightly off, as in would show a few kms more than actual. The impact on fuel efficiency will be negligible.