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Tyre Upsize Guide. Pros and Cons of Smaller Vs Wider Tyres

Tyre Upsize Guide. Pros and Cons of Smaller Vs Wider Tyres

Smaller Tyres or Bigger Tyres with More Width Comparison with Pros and Cons. Differences in Handling, Mileage, Suspension, Warranty Terms. Upsize Guide

 

Tyres - Safety

Tyres plays one among key role in Car Drive-ability, Handling, Maneuverability. Remember your Car Contact Pitch on the road is done in form of Tyres and Correct Tyre Pressure plays a key role in the drive response and feedback

Cars with Smaller Wheels, Puny Tyres are not the best if frequently drive on High Speeds.  Although 12 Inch, 13 Inch, 14 Inch Tyres with Profile of R165 or below can prove to be Fuel Efficient, but they lack the Grip Feel on the road when driven on higher speed and thus many consumer look for upsizing Car Tyres

If you are looking to choose New Tyres, refer below on what to look for

Wheel Size: Here R14, R15 Implies Wheel Size means 14 Inch Wheel, 15 Inch Wheel. Normally it is the most important factor

Size of Tyre - R14 165/65 - It implies that Tyre comes in 14 Inch Wheel having 165 mm Width and 65% as Sidewall Aspect Ratio. Sidewall Ratio determines the Height of Tyre. Higher the Tyre Sidewall aspect ratio - plush the drive is in City Condition. Low Profile Tyres looks good otherwise for aesthetic reason and known for Better Braking, Better Stability as the Tyre width is on higher Side. R implies Radial Tubeless Tyres and needless to mention are default choice in all modern age tyres.

Load Index: If you read Tyre Size completely, you will read it as R15 185/60 85 V - 85 Implies Load Index and in a car normally most of branded tyres have atleast 85 and above load index

Maximum Speed: V signifies Maximum Speed like V is for 240 km, H for 210 Km , W for 270 and Y for 300 Km. Tyres with Higher Speed Rating Generally are preferred in.

Prominent Tyre Brands / Companies : We Love Michelin, MRF, Bridgestone, Pirelli, Yokohoma Tyres . Go Always with the Brand.

 

Key Difference - Smaller Tyres Vs Wider Tyres

Wider Tyres - Tyre Upsize Benefits Smaller Tyres Benefits
Increased Grip on Road due to More Surface Width Area of Tyres Low Friction - Ideal for Cars driven in Daily City Ride. Been Sidewall is thicker due to higher Aspect ratio - ride is particularly soft and comfortable
   
Better Stability on High Speed. Ideal if drive Often on Highway Light Weight - Improved Low Speed Acceleration
   
Improved Balancing & Handling even on Bad Patch Roads. With Sidewall been thinner - it adds a firmness to Ride Cost Effective been Smaller Tyres costs Significant lesser
   
Macho Feel and Drive-ability. Cars Looks Well Planted with Wider Tyres Relative Easy Steering Response with Smaller Tyres
   
Net All Benefit: Thus Ride Quality Improves Net All Benefit: Able to Deliver Better Mileage

In terms of Tyre Upsize - Make a tradeoff basis requirement and Benefits Mentioned

 

Below are the Downside Risks

Upsizing to Wider Tyres - Downside Risks Smaller Tyres - DownSide Risks
If Upsize Tyres with Agressive Upsize > 3% - Suspension (Link Rod, Lower Arm, Bushes, Shockers etc) are suspectible to even much faster Quicker Wear & Tear Grip and Handling Feel is always missed in Puny / Small Tyres
   
Mileage would tend to be Impacted. Extent depends on Upsize, Profile. But can dip by anywhere from 5% to 10% Can Potentially be Risky in Smaller 12 Inch, 13 Inch Wheels with Smaller Tyres - if lacks ABS and applied force brake on high Speed
   
If you care for Light Most Steering Response and drive primarily on City Roads - then should not go in for Upsizing Wheels & Tyres - as a slight weight may take away that super lightness in Steering response. Lacks Highway Dynamics. Not Ideal for Upcountry Bad Patch Roads or High Speed Drive.
   
Been the Width increases in Upsize - Ride turns out slight Firm due to Lower Sidewall Aspect Ride Lacks Firmness due to Thicker Sidewall if Driven on High Speed, Upcountry Roads

 

How is Tyre Upsize Done

There are generally 3 Ways in which upsize are done by Car Owners :-

» Retain in Existing Wheels, Only Upsize Tyres of Higher WidthUpsize should not be beyond 2% Deviation in Circumference Wider Tyres

» Upsize Both Wheels and TyresGenerally under 2%, but to play Slight aggressive - upto 2.5% max Deviation

» Upsize and Replace Steel Wheel with Alloy Wheels and Upsize Tyres too - This is the Most Expensive replacement and costs Significant sum Generally 2% Deviation, but to play Slight aggressive - upto 3% max Deviation

 

What are Low Profile Tyres ? Is it Recommended

Although Globally Accepted Practice is when Tyre Sidewall Ratio is 50% or less than Tyre Width then it can be called as Low Profile Tyre. For Instance R17 225/50. It means Sidewall is 50% of Tyre Width means 112.5 mm

But for Indian Road Conditions where roads are not in best shape in many areas - we feel that anything under 55% Sidewall Aspect Ratio falls under Low Profile One

The higher the Sidewall aspect ratio, Sidewall is longer and it turns in Plush Ride Experience in City Condition. Lower the sidewall aspect ratios lead to slight Stiff ride. On Bad roads - if a Car with say 50% Aspect Ratio or lower drives on speed then driving on Pothole on such a speed can damage the wheel / tyre because of lower Aspect Ratio

Even the Vehicle Suspension System should be checked in as many customer even go in with Aggressive Upsize in Sedan, Hatchback Cars where suspension tuned for comfort but reducing Tyre Sidewall Profile Ratio to 55% in Sedan, Hatch cars can end up making ride Stiff and Rough.

Low Profile Tyres are what on demand of Enthusiastic Driver who love better Cornering, Better Higher Speed stability and most important are recommended only in SUV Range where Performance Orientation is best seek for. However - one should also know that Suspension of Car should support in to get in the Best from Low Profile Tyres, else the ride can turn out more on Firm side impacting drive aspect of Car


If Buying New Tyres - its important to buy in Tyres with Latest Manufacturing. Know -  how to decode :-

Find Tyre Manufacturing Date


 

Look at Below - how is Tyre Size Readed (Especially Width and Size)

 

 

How to Upsize Tyres - Which Size

Basic Principle of Upsizing Tyres on Ideal Basis :- The Width of the Tyre Increased and the Height Profile should come down

Overall - Diameter Variation should not be more than 2% - else will impact Mileage and lead to early Wear & Tear

Calculate Existing Wheel Diameter and Compare it with New Tyre Diameter

How to Calculate

Example - New Honda City Tyre Size is 15 Inch, R15 175/65 - which to the stature of this car is smaller to our view.Lets see whether 16 Inch Tyre R16 185/55 will suit it or R15 195/60 (expanding the width)

» Existing Diameter - Tyre Size (15 Inch * 2.54 cm) + Sidewall Gap of both Side of Tyre (17.5*.65)*2 = 60.9 cm

» Diameter with New Tyre - Tyre Size (16 Inch * 2.54 cm) + Sidewall Gap of Both Sides (18.5*.55)*2 = 60.9 cm

» Diameter with New Tyre - Tyre Size (15 Inch * 2.54 cm) + Sidewall Gap of Both Side (19.5*.6)*2 = 61.5 cm

Difference is less than 2%. Its best to have R15 195/60 as you do not need to change wheels (been of similar size) and also the height of the Tyre is not getting reduced considerably, rather the width is increasing with total diameter change as less than 2%. Its the best fit Tyre for New Honda City.

 

Lets take another example for Wagon R Lxi, which comes in R13 145/80 and to upgrade tyres to R14 165/65

» Existing Diameter - Tyre Size (13 Inch * 2.54 cm) + Sidewall Gap of both Side of Tyre (14.5*.80)*2 = 56.22 cm

» Diameter with New Tyre - Tyre Size (14 Inch * 2.54 cm) + Sidewall Gap of Both Side (16.5*.65)*2 = 57.01 cm 

Note - if you choose bigger Inch Tyres - you will be required to change Wheels too. Though - its best to choose Tyres in Same Size having More Width - if tyre size is smaller, but 13 Inch Tyres Specs is relatively smaller to our view - its best to Upgrade to 14 Inch

 

Tyre Prices

Indicative Range of Tyres basis Common Size is listed below - Each Tyre Cost

Wheel Size Price Range Wheel Size Price Range
12 Inch Tyres Rs 2200 - 2600 16 Inch Tyres Rs 4500 - 10000
13 Inch Tyres Rs 2600 - 3200 17 Inch Tyres Rs 8000 - 15000
14 Inch Tyres Rs 3000 - 4000 18 Inch Tyres Rs 15000 - 25000
15 Inch Tyres Rs 3800 - 6000 19 Inch Tyres Rs 18000 - 30000
Mahindra XUV300 W4, W6, W8, Option Features, Price...
Maruti Swift, Dzire to get CNG Kit Fitment as Fact...

Important: If you seek advise or recommendation, pls raise query in Car Forum instead of posting in comments

 

Comments 27

Guest - Dev on Wednesday, 22 November 2017 19:56

I have alto which have stick tyre 145/80R12
Can I upsize it with 185/60r13

I have alto which have stick tyre 145/80R12 Can I upsize it with 185/60r13
Guest - Shafeek on Sunday, 12 November 2017 01:59

Hi ,
Like to know the impact on mileage of upsizing my skoda rapid petrol tire from 185/60 R15 to 195/60 R15.
presently am getting 8/13 ( city/Highway)
Please advise
Thank you

Hi , Like to know the impact on mileage of upsizing my skoda rapid petrol tire from 185/60 R15 to 195/60 R15. presently am getting 8/13 ( city/Highway) Please advise Thank you
Guest - Lalit on Wednesday, 11 October 2017 18:58

I have Figo titanium which has 175/65 R14. I want to increase the size. What do u suggest??
Should i use a tyre with higher cross section in R14 or should i get it upgraded to R15 ??

Also plz suggest the expense for both.

Thanks you.

I have Figo titanium which has 175/65 R14. I want to increase the size. What do u suggest?? Should i use a tyre with higher cross section in R14 or should i get it upgraded to R15 ?? Also plz suggest the expense for both. Thanks you.
Guest - ramesh thakur on Thursday, 05 October 2017 16:17

sir i have fiat avventura diesel emotin can i upgrade tyre 205/ 60/ 16 please guid me

sir i have fiat avventura diesel emotin can i upgrade tyre 205/ 60/ 16 please guid me
Guest - puneet on Wednesday, 27 September 2017 17:35

Hello Nayan,
I would suggest go for 165/70 R14 If you want better ground clearance and comfort ride. (No difference in mileage).
If you drive mostly on Highway than go for 175/65 R14 for better grip with little increase 6mm in ground clearance. (difference in mileage 3-5 %)
185/60 R14 is 3rd option but it will strike with your front mud flaps so you have to remove it. also u will feel heavy steering (difference in mileage 5-7 %)
yokohama is better option it will last long than Michelin, you can also go for bridgeston 290, turanza.
Michelinis soft tyres and chances for puncture are more.

Hello Nayan, I would suggest go for 165/70 R14 If you want better ground clearance and comfort ride. (No difference in mileage). If you drive mostly on Highway than go for 175/65 R14 for better grip with little increase 6mm in ground clearance. (difference in mileage 3-5 %) 185/60 R14 is 3rd option but it will strike with your front mud flaps so you have to remove it. also u will feel heavy steering (difference in mileage 5-7 %) yokohama is better option it will last long than Michelin, you can also go for bridgeston 290, turanza. Michelinis soft tyres and chances for puncture are more.
Guest - Ram on Monday, 28 August 2017 01:31

Hi... I'm planning to buy honda brio and would like to change tires from 175/65 R14 to 195/55 R15 and the circumference deference is 2.13%. Does it okay? slightly Higher the 2%

Hi... I'm planning to buy honda brio and would like to change tires from 175/65 R14 to 195/55 R15 and the circumference deference is 2.13%. Does it okay? slightly Higher the 2%
Guest - Nayan ajmera on Friday, 11 August 2017 19:02

Hello ...I had a grand i10 and I want to upsize the tyre for better comfort so I search a bit and I found 185 60 14 but I m confused dat is it right or wrong so plz. Suggest and which tyre is better between Yokohama earth 1 vs Michelin xm2....Thank u

Hello ...I had a grand i10 and I want to upsize the tyre for better comfort so I search a bit and I found 185 60 14 but I m confused dat is it right or wrong so plz. Suggest and which tyre is better between Yokohama earth 1 vs Michelin xm2....Thank u
Guest
Monday, 27 May 2019

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