View Full Version : Wider tires


danimal
06-12-2005, 11:32 PM
Is it possible to use a p225 50 r17 tire on my Mazda 6s with the stock wheels and not have to worry about tire rub?

Fragile
06-13-2005, 02:28 PM
your should go with a 225/45-17.

danimal
06-14-2005, 01:38 PM
Thanks. Why less sidewall?

Patrick
06-14-2005, 02:55 PM
because they will be shorter and allow more clearance...and lower sidewall wont hurt your gearing as much..what is the stock tire size?

danimal
06-15-2005, 01:39 AM
stock tire size is 215/50 r17

Patrick
06-15-2005, 02:14 PM
ok..your factory tires are 25.46 inches tall, and 8.46 inchs wide
225-50-17 are 25.85 inches tall, and 8.85 inches wide..being wider wont make any difference, but taller will hurt your acceleration, and effect your speedometer reading.
225-45-17 are 24.97 inches tall and 8.85 inches wide, so they will also slightly effect your speedo reading, but they will actually increase your acceleration

danimal
06-18-2005, 01:13 AM
Is there an aftermarket product out there that will make the speedo right again after changing tire size?

bdmazda
06-18-2005, 06:45 PM
there is not a product that I am aware of, but you can take your car to a reputable shop and some have the equipment to recalibrate your speedo............alot of shops that do lifted vehicles with much larger tires have the equipment on hand or the knowledge to recalibrate the speedo. But in all fairness going to a 45 series tire will not affect the speedo as much as one would think, i had a friend done something similar, and at 55 mph on the dash he was actually doing a little better than 53. never hurts to think you are going faster than what you are when it comes to the 5 0.................(less tickets) hopefully.

Fragile
06-21-2005, 01:26 PM
yeah, with a 225-45, as opposed to the 215-50's, the spedo difference is hardly noticable

Old62
06-27-2005, 08:40 AM
seriously, it doesn't matter if you choose either 225-50-17 or 225-45-17.

the 225-50-17 is a whoping 1.5% larger and the 225-45-17 is 1.9% smaller. so in actual fact if you are doing 55mph: 225-50-17 will appear very close to 56 and 225-45-17 will appear 54mph (that is if you can read such a guage with any certainty).

i strongly doubt either will rub and in actual fact the larger size is closer to the truth of speed.

it's up to you and i hope you have not taken some of the information on this thread for fact.

Fragile
06-27-2005, 11:42 AM
As I said the 225/45-17 is the recommended plus-zero size. It is always better to go slightly smaller than slightly larger. The smaller diameter positively affects gearing ratios, making the car quicker. Larger tires hurt gear ratios causing the vehicle to be more sluggish. Additionally, tire manufacturers recommend staying within the +2% to -3% range, therefore -1.9% is actually better than +1.5%. One final note is that there are more tires choices in the 225/45-17 size, than the 225/50-17 size.

danimal
06-27-2005, 09:47 PM
Will 45's look ok without me lowering the car? I just don't want the tires to look too small for the wheel wells. Plus I hate spending cash and not being satisfied with the end result. That's why I got out of Jeeps

Fragile
06-28-2005, 11:32 AM
you can barely tell the difference, but i would contend that you can feel the difference. and like i said, there is a much larger selection in 225/45-17 than 225/50-17. Just make sure the load rating is at least 92 IIRC (you may want to check me on this)

danimal
06-29-2005, 01:04 PM
What's 92 IIRC? I did a search but found nothing....

Fragile
06-30-2005, 02:11 PM
sorry, IIRC stands for "If I Recall Correctly". The 92 is a load rating...any respectable tire dealer, real or online, should be able to tell you the load rating of any particular tire.

danimal
07-01-2005, 12:22 PM
Wow I feel real bright [8D]