Tyre Upsizing: Should You Or Shouldn’t You?

While making a buying decision, we today have multiple choices and automobiles are no different. Though factors like price and performance play an important role but look and aesthetics impact decision making to a large extent especially for automobile enthusiasts. The majority of the auto-enthusiasts are always yearning to have sporty and unique vehicle charisma. This eagerness at a time leads to customization and modifications, and ‘tyre upsizing’ is no exception.

Although tyre upsizing gives a vehicle a bold stance but along with the joy of resolute appearance it also does offer performance drawbacks. Therefore, vehicle owners may like to consider a number of factors before upsizing their tyres.

Technically, tyre upsizing can be performed in two ways:

#1: Mounting wider tyres while retaining the original wheels
#2: Upgrading to larger wheels and installing wider tyres

 

Advantages of Tyre Upsizing

Besides a cosmetic uplift in car’s profile, tyre upsizing brings the following benefits for owners.

Personalization: For many car owners, tyre upsizing is one of the quickest ways to personalise their vehicle and add oomph to its side profile. In other words, wider tyres make your vehicle look cool and boost its style quotient.

Greater Stance: Technically, wider tyres offer a larger contact patch generating more grip on the road. This helps the driver maintain greater control and stability, especially when the vehicle is cruising at a relatively higher speed.
Safe Breaking: Larger tyres significantly reduce the breaking distances offering better control while breaking. This also means little or no skid and therefore, more safety.

Easy Cornering: Suspension plays a key role in corning your car. Wider tyres tend to have slimmer sidewall flex which enables the driver to corner better even when the vehicle is moving at high speed.
Overall Control: Tyre upsizing enhances the overall performance of a vehicle with regards to its balance, stability and traction. This can prove to be an asset for vehicles that have understeering or oversteering nature since wider tyres help the driver balance the vehicle properly thus making the driving safe and secure.

 

Disadvantages of Tyre Upsizing

Despite the aforementioned benefits, tyre upsizing also has a few significant drawbacks that discourage many car owners.

Higher Cost: Tyre upsizing can be an expensive proposition for some, depending on factors such as the type of vehicle and tyres used. However, in general, larger wheels and tyres mean more expenses for the car owner.

Reduced Acceleration: While large wheels and wider tyres mean a great grip on the road, they can cost vehicle’s performance in terms of affecting its acceleration. Wider tyres add to the overall body weight of the vehicle thereby increasing the burden on the engine capacity and slowing down its acceleration.

Weighted Steering: With a larger contact patch, wider tyres and large wheels improve stability. However, at the same time, they mean a heavy steering, which requires more effort from the driver to manoeuvre and control the steering. This can cause a significant disadvantage to drivers who prefer to drive vehicles with a light steering, and in a slow traffic scenario.

Low Fuel Efficiency: Tyre upsizing can also affect the fuel efficiency of a vehicle. With wider tyres and larger wheels, the car has a better grip on the road, which affects the rolling resistance negatively. As a result, the car will need more revs to move efficiently, consuming more fuel in the process.

Wrong Speedometer Reading: Done incorrectly, tyre upsizing can affect the reading in your vehicle’s speedometer. Car owners must exercise care in choosing the right tyre for upsizing. Tyre experts recommend upsizing tyres proportionately; meaning the increase in width of tyres should be equally proportionate to the decrease in tyre’s sidewalls. If the diameter of upsized tyres goes higher than that of the original tyres, it may affect the reading of the speedometer and hamper the performance many other modern systems such as ABS, ETC, ESP and TPMS.

Little Driving Comfort: Tyre upsizing can adversely affect the riding quality. With larger wheels and wider tyres, the length of the sidewalls goes drastically down, leaving little or no sidewall flex for the wheels to absorb shock on bumpy roads. Hence, this makes riding less comfortable for the driver and passengers alike.

 

So, should one upsize or not?

tyre upsize

While tyre upsizing is a compelling proposition from the standpoint of a vehicle’s aesthetic appeal, vehicle owners must factor in a number of aspects related to their regular driving requirements. Moreover, it is highly recommended that vehicle owners consult professional tyre experts in order to determine if tyre upsizing is a wide move for them.

 

How to Calculate Tyre Upsizing?

Tyre size calculator is the key to achieve optimal performance for your vehicle. With the help of tyre upsizing calculations, the best compatible plus size wheels for your vehicle can be chosen. There are two ways to do upsizing calculations:

1) Retaining Original Wheels/Alloys:

Tyre size calculator

When you talk of upsizing your car tyres and retaining the original set of wheels, it means that no modification will be done to the metal portion i.e. the alloy or the rim of the tyre, however, the tyre will be changed as per the fitment requirement and possibility.

For safe tyre upsizing, you must ensure the OD (overall diameter) of the new tyres remains within the permissible tolerance, which is only up to 3% of the OD of stock tyre.

For example, if the OD of the stock tyre is 24.47 inches, then the OD of the new tyre should not go beyond 25.20 inches.

Here’s how to achieve the permissible tolerance.

Tyre Width:

Let’s assume the original tyre size is 185/65 R15 with an OD of 24.47 inches.

So, the width of our stock tyre is 185mm.

For safe upsize, let’s add 20mm to the width of your stock tyre.

So, the width of your new tire should be 205mm.

Sidewall Height:

The sidewall height of our stock tyre is 65% of the thread width.

As per the thumb rule, for every 10mm increase in width of tyre, the sidewall height (or aspect ratio) should be reduced by 5 percent.

In our example, the sidewall height should be reduced by 10 percent since there was a 20mm increase in the width of our tyre.

So, the sidewall height of the new tyre should be 55% of the thread width.

Rim Size:

The Rim size or diameter should remain the same. In this example, it is 15 inches.

Therefore, the max upsize for a stock tyre size (185/65 R15) should be 205/55 R15.

 

2) Upgrading to Larger to Wheels/Alloys:

tyre upsizing benefits

When you talk of upsizing your car tyres thereby upgrading to a larger set of wheels or alloys, it means that you are modifying the company fitted  wheels in order to increase its diameter and make it look more appealing. The tyres of these increased diameter alloys are called low-profile tyres and are fitted as per the possibility of the gap between the wheels and the vehicle wheel arcs. The above example image shows how a company fitted alloy wheel is upgraded to a larger wheel that has low-profile tyres.

If we want to upgrade to a bigger alloy, we still need to stick to the permissible tolerance mentioned in the previous example.

If we want to upgrade to a 16-inch alloy wheel, then the size of the new tyre should be 205/55 R16, keeping the OD within 3% permissible tolerance, i.e., 24.47 – 25.20 inches.

 

Tyre Upsizing Calculator Online

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wangchuk.yeshi@gmail.com
Guest
wangchuk.yeshi@gmail.com

Hi,
I am owning I 20 elite Magna varint with tyre size of 185/70 R14 and i want to change ti 190/65/R14 or 195/65/R14. please cna you suggest me whether to gor for it and if yes which one i should choose.

looking forward for your support and help.

Bharath Kumar
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Bharath Kumar

Hi,

I have Swift VXI which comes with 165/80/R14. I need a upsize for my existing one.
After checking i have found : 195/55/R16

what will be the best upsize alternative you would suggest?

Harshal
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Harshal

Hi even I have Swift VXI and i want to upsizize to 195/55/R16 tyres. So what was the reply you got from the experts will you please tell me.

Ramy
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Ramy

i did a big mistake i guess , i changed the tyre size from 185/65 R15 TO 195 /65/R15 , What is the advantages & disadvantages of that

Subhash
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Subhash

Hi, I have 2013 model Ertiga Zdu, which comes with MRF 185 65 R15 tyres. iam planning for a replacement of tyres and was exploring option of upsizing it to 195 65 R15. Iam looking for Michelin

Subhash
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Subhash

Hi, I have 2013 model Ertiga Zdi, which comes with MRF 185 65 R15 tyres. I am planning for a replacement of tyres and was exploring option of upsizing it to 195 65 R15. Iam looking for Michelin Primacy 3 ST type.
Do you suggest this change?
I was looking for this upsize as my driving includes daily drive in highways of about 60kms. Will this upsize affect my file efficiency?
Thanks,
Subhash

Amit
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Amit

I have xuv500 and the tyre size 235/65/r17 can I upgrade to 265/65/r17

Clement
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Clement

Original wheel size 215/45R17 change to 225/40R18, is this within the tolerence? Will it hit car fender on bumpy road or vibration at high speed?

Ankit Singh
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Ankit Singh

What would be best upsize for my swift dzire zdi with 185/65 R15. Should i upsize or not?
TIA

Vikramdas
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Vikramdas

I own a Hyundai eon with 145/80/R12. would like to upsize to 165/65/R13. pls suggest.

VIVEK SHIVANAND NAIK
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VIVEK SHIVANAND NAIK

Hello,

I have a Ciaz VXi+ with tyre size 185/65 R15. planning to upgrade to 195/65 R15… what all effects do you see with this change…

planning for Yokohama Bluearth / Earth1

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Vivek

You can upsize 185/65R15 with 195/65R15 as it is within the permissible limit of tyre upsizing. You can buy anyone in between Yokohama Bluearth & Earth-1 E400. Please click on the below mentioned link.

https://www.tyremarket.com/Product/4563/Car-Tyres/Yokohama-Blue-Earth-AE50-195-65-R-15-Tubeless-91-V-Car-Tyre
https://www.tyremarket.com/Product/2790/Car-Tyres/Yokohama-EARTH-1-E400-195-65-R-15-Tubeless-91-H-Car-Tyre-

Regards,
Team Tyremarket.com

Sleazy Fanai
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Sleazy Fanai

Hi, i have dutsun redigo, i have upsize from 155/80 r13 to 185/60 r14, can i use 205/60 r14 on the rear only?

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Sleazy Fanai

We would not recommend to use 205/65R14 in place of 155/80R13 which is the stock tyre size. 205/65R14 is not in the permissible limit of tyre upsizng when we upgrade it from 155/80R13. It will be better to use the present upsize 185/60R14. You can buy the same from the below-mentioned link.

https://www.tyremarket.com/Search/Car-Tyres/185-60-R14

Regards,
Team Tyremarket.com

Tushar
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Tushar

Hey,
I own a Maruti Suzuki Stingray Vxi with Rim size of 14″ and tire fit is 155/65 R14. I want to upgrade it to 15′ rim size, what will be the perfect tire fit for these set of alloys and will the upsize affect the fuel economy?

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Tushar

Tyre upsize will affect the fuel economy of the vehicle. For more information please read the below-mentioned article on tyre upsizing.
https://www.tyremarket.com/tyremantra/tyre-upsizing-benefits-drawbacks/

Also for 155/65R14 tyre size, you can’t upsize it in 15″ tyre size.

Regards,
Team Tyremarket.com

Rohit
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Rohit

Hi

I own Tata Tiago NRG. It comes with 175/65R15 tire size.

can I upsize it to 15 inch Alloys. If Yes, Will it hit fender or body in potholes.

Should I go with it or simply replace with same size alloys.

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Rohit

Yes, you can upsize 175/65R15 tyre size with broader 15″ tyre size. You can any of the tyre mentioned below

195/60R15 (most suitable upsize)
Pirelli Cinturato P6: https://www.tyremarket.com/Product/3886/Car-Tyres/Pirelli-P6-CINT-195-60-R-15-Tubeless-88-V-Car-Tyre
Yokohama Blue Earth AE50: https://www.tyremarket.com/Product/4564/Car-Tyres/Yokohama-Blue-Earth-AE50-195-60-R-15-Tubeless-88-V-Car-Tyre

185/65R15
Michelin Energy XM2: https://www.tyremarket.com/Product/3507/Car-Tyres/Michelin-Energy-XM2-185-65-R-15-Tubeless-88-H-Car-Tyre
Pirelli Cinturato P6: https://www.tyremarket.com/Product/4025/Car-Tyres/Pirelli-P6-CINT-185-65-R-15-Tubeless-88-T-Car-Tyre

Regards
Team Tyremarket.com

Ankit
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Ankit

Hello there ,
I’ve old I20 (2011 ) model . The ground clearance of my car is 165mm. I want to increase the ground clearance slightly say to 170mm.
As my tires are also worn out, new tyres need to be installed. So if I upgrade from 185/65R14 to 185/70R14 ,will the ground clearance increase or not?
Current stock tyre are of Apollo make, should I look for other brand or it is good to go again?

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Ankit
Based on your requirement the best upsize for 185/65R14 tyre is 205/60R14. By fitting 205/60R14 tyre size the ground clearance will get the increase by 8mm to 9mm. 185/70R14 tyre size is not under the permissible limit of tyre upsizing so we would request you not to change your stock tyre with 185/70R14.

Apollo is also a good brand but if you wish to choose any other brand you can select the tyre as per your requirement by clicking on the below-mentioned link.
https://www.tyremarket.com/Search/Car-Tyres/205-60-R14

Regards,
Team Tyremarket.com

Mario
Guest
Mario

Hi there,

Just wanted your opinion if I can use a wider tyre.

I drive a 2015 Mazda CX-5 2.2 Diesel Auto AWD. The original tyres are 225/55/19 tyres on a 7J rim.

I need to replace all 4 tyres soon and wanted to know if I can use a wider tyres, either 235/55/19 or 245/50/19. Can I use any of these tyres or both perhaps to get better handling and stance as the OE tyres are abit narrow for my liking.

I have heard that incorrect tyres can damage the transmission.

Would appreciate your feedback on those please.

Thanks
Mario

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Mario

You can replace 225/55R19 with both 235/55R19 & 245/50R19, both the sizes are under the permissible limit for tyre upsizing. To buy 235/55R19 tyre size you can click on the below-mentioned link or call us at +91-8088-090-090.

https://www.tyremarket.com/Search/Car-Tyres/235-55-R19

Regards,
Team Tyremarket.com

Sasidhar
Guest
Sasidhar

Hi my car is Renault Triber which has steel165/90/r14, I would like change to Alloy 195/60/r15 Continental, is it good choice, do I need to correction in odometer? What is the impact on Milage for city traffic after this change?

Team Tyremarket.com
Editor
Team Tyremarket.com

Hu Sasidhar

Yes, you can upgrade 165/80R14 tyre size to 195/60R15 as it is under the permissible limit of tyre upszing. Yes, you need to recalibrate the speed-o-meter of the vehicle as it will show slightly wrong information while running the vehicle.
195/60R15: https://www.tyremarket.com/Search/Car-Tyres/195-60-R15

Regards,
Team Tyremarket.com

Thangam Shivaji
Guest
Thangam Shivaji

Up size 175 65 r14 to which size

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Thangam

You can upsize 175/65R14 with tyre size 185/65R14, you can buy the same by clicking on the below-mentioned link.
https://www.tyremarket.com/Search/Car-Tyres/185-65-R14

Regards,
Team Tyremarket.com

Vijay
Guest
Vijay

Hi ,

I own a Jetta 2.0 TDI , running on stock 205/55 R16 , i am planning to upgrade to 225/55 R16 , while retaining the stock alloys . Is it feasible , please advise .

Team Tyremarket.com
Editor
Team Tyremarket.com

Dear Vijay

Volkswagen Jetta comes with tyre size 205/55R16 but you can’t upsize it with tyre size 225/55R16 as it is not under the permissible limit of tyre upsizing. You can upsize 205/55R16 with tyre size 215/55R16.

https://www.tyremarket.com/Search/Car-Tyres/215-55-R16

Regards,
Team Tyremarket.com