the tyres on my car are 185x65x14. i have been offered some 185x70x14. will it be ok to put these on.
2007-06-18 01:34:37 · 11 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
I'd stick with the stock size, though 5mm probably won't make a difference. The other guy was right. 185=width of tires in mm. 70=profile in mm. 14=diameter of wheel in inches.
2007-06-18 01:45:35 · answer #1 · answered by Anonymous · 0⤊ 1⤋
The manufacturer is usually the best guide as to which tyres you put on your car. They work this out based upon a number of factors such as handling, fule consumption and so forth. The 185 on your tyre number refers to the width of the tyre. The larger the number the woder your trye. The 65 (or 70 in the case of the new tyre) refers to the profile of the tyre, or the height of the tyre from the rim to the top of the tyre. The 14 refers to the internal diameter of the tyre. This is the most critical factor in buying a tyre. Your vehicle has size 14 rims so you cannot fit a tyre that is larger (15) or one that is smaller (13) on to the rim. It just will not fit.
To answer your question more directly, you can put on the 185x70x14 tyres significant issues. It will just mean that your vehicle will be a little higher off the road since the profile of the tyre is higher. The height difference will probably not even be noticabe to you in any way.
2007-06-18 08:45:37 · answer #2 · answered by hsssl2 2 · 1⤊ 0⤋
Would you wear size 11 trainers if you took a 10? They'll fit but they're not right, and as a result you'll have a couple of effects.
Firstly, your speedo will start reading slower, in other words, your speedo will be saying 70mph but you'll be doing nearer 75.
Second, the higher sidewall will reduce acceleration, as the circumference of the tyre is greater, it requires more torque. It will also have an effect on the handling of the car, you'll have two tyres bigger than the other two. Not a good combination.
Third, It's a common size, just go elsewhere. It's not like your running enormous sizes that are hard to get hold of.
You'll be upping you're heel diameter by nearly an inch, which is more than enough to create dodgy handling.
2007-06-19 05:19:15 · answer #3 · answered by Steven N 4 · 0⤊ 0⤋
I'll only deal with the most important part, which everyone else has ignored.
The 185/70R14 tire is not going to handle or stop as well as the 185/65R14 tire. The 70-series tire will have more sidewall flex and possibly a narrower tread width than the proper 65-series tire that you should have.
If you were my customer in a tyre shop, I would not recommend this change as it is tantamount to re-engineering (actually downgrading) the capabilities of the vehicle.
2007-06-18 22:51:40 · answer #4 · answered by Naughtums 7 · 0⤊ 0⤋
If I remember rightly the 185 is the measurement in milimetres of the width of the tyre (the tracked area), the 70 is the measurement from the rim of the wheel to the edge of the tyre, (the profile). A 5 mm difference shouldnt make too much difference. Consult your hand book to see what the correct tyre size would be
2007-06-18 08:40:19 · answer #5 · answered by Anonymous · 0⤊ 1⤋
The 70's tire will have a taller sidewall and thus will be higher. Since it is a taller tire, you will have less revolutions per mile and thus your speedometer will be inaccurate by about 2 mph less than what is actually showing.
Try the tire size calculator listed below - width is 185, aspect ratio is 65 and 70 respectively, diameter is 14. Select a speed (55, 60, etc.) and you will see the results of using the different tire.
2007-06-18 08:50:52 · answer #6 · answered by Somethingtotry 6 · 0⤊ 0⤋
Maybe.
It depends on the accuracy of your speedometer.
The 70 is the profile - the height of the tyre from rim to tread as a percentage of the tread width.
By increasing the tyre profile you are increasing the overall diameter of the tyre. This means that the car travels further for one revolution of the tyre - 3.1% further.
Car speedometers don't actually measure the speed of the car on the road, they measure the number of revolutions of the gearbox output shaft, and are calibrated to take account of the tyre size. By increasing the size of the tyre, you are increasing your road speed for a given speedometer reading.
The law in Europe (including the UK) allows a speedometer to over-read by up to 10%, but does not allow them to under-read. To allow for manufacturing tolerances, they are designed to over-read slightly, but not by as much as 10% as the amount they over-read will increase with worn tyres.
If your speedometer is calibrated to over-read by less than 3.1% on brand new tyres of the correct size (185/64R14), it will under-read on new 186/70R14 tyres - making your car illegal for use on public roads.
2007-06-18 11:49:49 · answer #7 · answered by Neil 7 · 0⤊ 0⤋
This is the ratio of the height of the tyre sidewall, (section height), expressed as a percentage of the width. It is known as the aspect ratio. In this case, 65% of 185mm is 120.25mm - the section height. You can put them on but there might be a lack in performance
2007-06-18 11:06:58 · answer #8 · answered by basketcase 2 · 0⤊ 0⤋
width in mm X %of width X diameter of rim in inches. In your case 185mm wide x 120mm high(65% of 185mm) x 14 inch rims. The 185x70x14 should be fine.
2007-06-18 08:53:09 · answer #9 · answered by infernoflower 3 · 0⤊ 0⤋
They will fit it just means that they're higher profile so you need enough clearance around the arches!
2007-06-21 16:33:52 · answer #10 · answered by Anonymous · 0⤊ 0⤋