Tires AHHHH

pingman · 09-17-2007, 06:57 PM

Hey all,can I fit 195/55/15 or 195/50/15 tires on my prius? I was looking at some Kumho Ecsta ASX or AST on TIRERACK for $41 for the AST and $66 for ASX. If the TPMS is an issue can I just not use it with new tires?

patsparks · 09-17-2007, 08:24 PM

195 60 15 should be right If you go for a smaller aspect ration you will upset your speedo and odometer readings. I believe 185 65 15 and 195 60 15 have a very similar diameter. By the way, 195 60 15 are the standard fitment in Australia and maybe other markets outside USA.

Depending on brand and construction there may be about 6mm (1/4") difference in tyre diameter or about 1%.

If you fit 195 55 15 or 195 50 15 tyres your speedo will be out quite a lot and it may seem you get better economy but because the wheels have to make more revolutions to cover the same ground you may use more fuel. You will also be driving slower. I think it's best to try and stick close to the original overall diameter tyre.

Lim · 09-17-2007, 08:30 PM

Here is tire size calculator. You will find it is very useful.
Tire Size Calculator

patsparks · 09-17-2007, 09:35 PM

That's what I was looking for, thanks Lim.

09-17-2007, 08:24 PM	#2
patsparks Uneducated bird-brain Aussie Join Date: Jul 2007 Location: Adelaide South Australia Posts: 4,905 My Car: 2004 Prius Package: Base Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 17	195 60 15 should be right If you go for a smaller aspect ration you will upset your speedo and odometer readings. I believe 185 65 15 and 195 60 15 have a very similar diameter. By the way, 195 60 15 are the standard fitment in Australia and maybe other markets outside USA. Depending on brand and construction there may be about 6mm (1/4") difference in tyre diameter or about 1%. If you fit 195 55 15 or 195 50 15 tyres your speedo will be out quite a lot and it may seem you get better economy but because the wheels have to make more revolutions to cover the same ground you may use more fuel. You will also be driving slower. I think it's best to try and stick close to the original overall diameter tyre. __________________ All the warranty I need. And for thrills -> Still averaging 4.4L/100km across town 2004 silver base model Prius Shark fin, genuine mudflaps, colour matched side mouldings, rear bumper scuff guard, sheepskin seats, BT Plate. I love it!

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09-17-2007, 06:57 PM	#1
pingman Join Date: Apr 2007 Posts: 124 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Hey all,can I fit 195/55/15 or 195/50/15 tires on my prius? I was looking at some Kumho Ecsta ASX or AST on TIRERACK for $41 for the AST and $66 for ASX. If the TPMS is an issue can I just not use it with new tires?

09-17-2007, 08:30 PM	#3
Lim Junior Member Join Date: Jul 2007 Location: Hong Kong Posts: 10 My Car: 2007 Prius Package: S Touring Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Here is tire size calculator. You will find it is very useful. Tire Size Calculator

09-17-2007, 09:35 PM	#4
patsparks Uneducated bird-brain Aussie Join Date: Jul 2007 Location: Adelaide South Australia Posts: 4,905 My Car: 2004 Prius Package: Base Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 17	That's what I was looking for, thanks Lim.