225/40 or 225/45? Difference?
- Thread starter Jasnall
- Start date
The 225/45 is 8 mm. or 1.2% taller than the stock 215/45.
The 215/45 is probably close to the fenderwell too since some have reported rubbing occasionally with the stock tires.
From what has been reported by various owners you have about a 50/50 chance of rubbing in the top of the fenderwell under normal conditions.
With people in the back seat or hitting large bumps or both together then your chances of rubbing increase.
Good luck if you decide to go with the 225/45.
The 215/45 is probably close to the fenderwell too since some have reported rubbing occasionally with the stock tires.
From what has been reported by various owners you have about a 50/50 chance of rubbing in the top of the fenderwell under normal conditions.
With people in the back seat or hitting large bumps or both together then your chances of rubbing increase.
Good luck if you decide to go with the 225/45.
I've run 225/40/18 on the stock wheels with zero issues, even heard of people going wider... I would even recommend 225/40/18 over 225/45/18 simply because of the selection of tires that are available and prices.
As for the question of why 225/45 might rub over the 215/45.. the 45 is percentage of the width. so 45% of 225 milimeters is taller then 45% of 215 milimeters
Also a local guy to me runs the 225/45 size with no issues, but like i said, there's just more available in the 225/40 size.
As for the question of why 225/45 might rub over the 215/45.. the 45 is percentage of the width. so 45% of 225 milimeters is taller then 45% of 215 milimeters
Also a local guy to me runs the 225/45 size with no issues, but like i said, there's just more available in the 225/40 size.
Young Roids
Member
- :
- The pennies have been saved the MS3 is mine!
I want to run 225/45 because I like the idea of a slight increase in sidewall instead of a decrease in sidewall but on the other hand I do not want rubbing. It's too bad it has to be this way.
Young Roids
Member
- :
- The pennies have been saved the MS3 is mine!
I think I just have to try for a 45 myself but I will hate myself if it rubs.
Young Roids
Member
- :
- The pennies have been saved the MS3 is mine!
Hmm maybe it would be better to try and stuff a 235/40 on a 7.5 inch rim
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- 13 MX-5
A lot of people probably are. I know if you run the 225/45' with stock suspension, you'll rub on bumps cornering or with passengers. You'll even rub if you just have a rear sway bar because it's more about dampening for your tire to rub. But if people had springs or coilovers, you wouldn't rub unless you went with a wider wheel and tire.
funksilver07
Member
- :
- 2007 Sunlight Silver Mazdaspeed 3 GT
225/45/18 Dunlop Direzza Z1 sport star spec on my 07' MS3 and "NO RUBBING" even when autoxing. I prefer this to the stock size, beefier and having a bit more rubber a little smoother ride. So you can run this size with success with the stock wheel.
Depends on tire too
I have 225/45x18 RE01-R's and have never had them rub, including during autocross and track. I think it actually depends somewhat on the brand/style of tire (not all are created equal). I also know that some 225/40's are not spec'd to go on the stock 7" rim, so that's worth checking before investing.
I have 225/45x18 RE01-R's and have never had them rub, including during autocross and track. I think it actually depends somewhat on the brand/style of tire (not all are created equal). I also know that some 225/40's are not spec'd to go on the stock 7" rim, so that's worth checking before investing.
funksilver07
Member
- :
- 2007 Sunlight Silver Mazdaspeed 3 GT
I agree with not using a 225/40 on the stock size wheel. NO tire manufacturer's or installers will recommend that size on a 7" wide rim. I know people are running with the 225/40 (supposedly without issue) but personally I would run a 7.5"-8" rim for that size.
Here's my reason why:
Tire bead is the term for the edge of a tire that sits on the wheel. Wheels for automobiles, bicycles, etc. are made with a small slot or groove for the tire bead to sit in. When the tire is properly inflated the air pressure within the tire keeps the bead in this groove. When putting a new tire on a wheel, there is the problem of sealing or setting the bead: the tire will not inflate if the incoming air can escape. Some people spray starter fluid or WD40 into the tire and then light it to set the bead.
It is common amongst drivers of off-road vehicles to decrease the air pressure in their tires. This makes the tread of the tire spread out, creating more surface area for the tire's tread to grip the terrain. If the pressure is too low there may not be enough pressure to keep the bead on the wheel thus causing the bead to pop off the wheel. This is often referred to as "losing a bead". Beadlocks, which clamp the bead on the wheel, are often used in this case.
Here's another site with some very good info on tires, definitely a good read on tire information. Personally, I won't run "cheap" tires or an inappropriate tire/rim size...it's one of the most important pieces of equipment between me and the road.
Here's my reason why:
Tire bead is the term for the edge of a tire that sits on the wheel. Wheels for automobiles, bicycles, etc. are made with a small slot or groove for the tire bead to sit in. When the tire is properly inflated the air pressure within the tire keeps the bead in this groove. When putting a new tire on a wheel, there is the problem of sealing or setting the bead: the tire will not inflate if the incoming air can escape. Some people spray starter fluid or WD40 into the tire and then light it to set the bead.
It is common amongst drivers of off-road vehicles to decrease the air pressure in their tires. This makes the tread of the tire spread out, creating more surface area for the tire's tread to grip the terrain. If the pressure is too low there may not be enough pressure to keep the bead on the wheel thus causing the bead to pop off the wheel. This is often referred to as "losing a bead". Beadlocks, which clamp the bead on the wheel, are often used in this case.
Here's another site with some very good info on tires, definitely a good read on tire information. Personally, I won't run "cheap" tires or an inappropriate tire/rim size...it's one of the most important pieces of equipment between me and the road.
