Want bigger rims, narrower tyres for winter, or is your size out of stock? The calculator shows how much the overall diameter changes, what the speedometer will read after the swap and whether the difference stays within the limits the tyre trade accepts. Below it you will see sizes with a similar diameter that we have in stock right now.
Tyre size calculator
Check whether a different tyre size will fit your car
Sizes with a similar diameter to 205/55 R16
Tyres we have in stock whose overall diameter differs from 205/55 R16 by no more than 3%.
| Size | Diameter | Difference | Available | |
|---|---|---|---|---|
| 205/55 R16 current | 632 mm | 0,0% | 392 models from 38,00 € | |
| 225/50 R16 | 631 mm | -0,1% | 38 models from 48,00 € | Compare |
| 185/75 R14 | 633 mm | +0,2% | 11 models from 81,00 € | Compare |
| 215/35 R19 | 633 mm | +0,2% | 6 models from 82,00 € | Compare |
| 245/30 R19 | 630 mm | -0,4% | 12 models from 135,00 € | Compare |
| 225/45 R17 | 634 mm | +0,4% | 363 models from 49,00 € | Compare |
| 195/65 R15 | 635 mm | +0,4% | 301 models from 41,00 € | Compare |
| 215/40 R18 | 629 mm | -0,4% | 93 models from 57,00 € | Compare |
| 245/35 R18 | 629 mm | -0,5% | 64 models from 67,00 € | Compare |
| 195/70 R14 | 629 mm | -0,5% | 31 models from 48,00 € | Compare |
| 185/60 R16 | 628 mm | -0,6% | 30 models from 34,00 € | Compare |
| 245/40 R17 | 628 mm | -0,6% | 48 models from 68,00 € | Compare |
| 205/50 R17 | 637 mm | +0,8% | 259 models from 51,00 € | Compare |
| 205/60 R15 | 627 mm | -0,8% | 67 models from 45,00 € | Compare |
| 245/45 R16 | 627 mm | -0,8% | 6 models from 139,00 € | Compare |
| 195/50 R17 | 627 mm | -0,8% | 3 models from 130,00 € | Compare |
Bigger rims, same diameter
The closest size we match to a rim one, two or three inches bigger. The percentages show the difference in overall diameter.
| Original | +1 | +2 | +3 |
|---|---|---|---|
| 175/65 R14 | 185/55 R15 +0,2% | 195/45 R16 -0,2% | 195/40 R17 +0,8% |
| 185/65 R15 | 195/55 R16 -0,1% | 205/45 R17 -0,8% | 215/40 R18 +1,2% |
| 195/65 R15 | 205/55 R16 -0,4% | 215/45 R17 -1,4% | 225/40 R18 +0,4% |
| 205/55 R16 | 215/45 R17 -1,0% | 225/40 R18 +0,8% | 245/30 R19 -0,4% |
| 205/60 R16 | 215/50 R17 -0,9% | 225/45 R18 +1,1% | 235/35 R19 -0,8% |
| 215/60 R16 | 225/50 R17 -1,1% | 235/45 R18 +0,6% | 245/35 R19 -1,6% |
| 215/65 R16 | 225/55 R17 -1,0% | 235/50 R18 +0,9% | 245/40 R19 -1,1% |
| 225/55 R17 | 235/45 R18 -1,6% | 245/40 R19 -0,1% | 255/35 R20 +1,1% |
| 235/65 R17 | 245/55 R18 -1,4% | 255/50 R19 0,0% | 265/45 R20 +1,2% |
| 235/55 R18 | 245/50 R19 +1,7% | 255/40 R20 -0,5% | 265/35 R21 +0,4% |
Don't know your car's tyre size?
Choose your car's make, model and year - we will show the sizes the manufacturer specifies and the tyres that fit them.
How to use the tyre calculator
What 205/55 R16 means
The first number is the tyre width in millimetres. The second is the profile height as a percentage of the width: on a 205/55 tyre the sidewall is 55% of 205 mm, or about 113 mm. R stands for radial construction, and the last number is the rim diameter in inches. From these three numbers the calculator works out the overall diameter - how tall the whole tyre is, rim included. Other markings, such as the load and speed index, are explained on our tyre markings and indices page.
Where to find your car's tyre size
Your current size is printed on the tyre sidewall. The sizes the carmaker approves are on a sticker in the door frame or inside the fuel filler flap, and in the owner's manual. If several sizes are listed there, any of them can be fitted without further checks. If you do not know the size, pick your car in our search and it will show the sizes the maker specifies.
How big a difference is acceptable
In Latvia, size is governed by Cabinet Regulation No. 295 on vehicle roadworthiness tests: the tyre's size, construction and pressure must meet the vehicle manufacturer's requirements, the tyre must not touch the body or suspension, and its load and speed index must be sufficient. The regulation sets no percentage. A rule of thumb widely used in the tyre trade is an overall diameter difference of up to ±3%, so the calculator shows green up to 2%, yellow up to 3% and red above that. The safest choice is a size from the manufacturer's list.
What a size change does to the speedometer
The speedometer counts how many times the wheel turns. If the new tyre has a larger overall diameter, each turn covers more ground, so your real speed is higher than the speedometer shows. UNECE Regulation No. 39, which covers speedometers on the EU market, requires that a speedometer never shows less than the true speed. Manufacturers therefore usually set it to read slightly high, and a larger tyre eats into that margin. A smaller diameter does the opposite: the speedometer reads higher and the odometer counts more kilometres than you have driven.
Bigger rim, lower profile
If you fit a larger rim, the profile has to get lower to keep the overall diameter the same. The "Bigger rims, same diameter" table shows the typical steps: 195/65 R15, 205/55 R16, 215/45 R17 and 225/40 R18 are almost the same height. A lower profile gives sharper steering but a firmer ride, and the rim is more easily damaged in a pothole. For winter many drivers do the opposite and choose a narrower tyre with a taller profile on a smaller rim. Before buying a wider tyre, check that the rim width suits it and that the tyre will not touch the body at full steering lock.
From the calculator to the shop
The table under the calculator lists only sizes we have in stock right now, with the number of models and the lowest price. Click a size to see the tyres, or "Compare" to put it into the calculator as the new size.
Biežāk uzdotie jautājumi
Yes, if it is on the carmaker's list of approved sizes. You will find it on the sticker in the door frame, on the fuel filler flap or in the owner's manual. A size outside that list may not pass the roadworthiness test.
Latvian rules set no percentage - the size must meet the carmaker's requirements. A rule of thumb widely used in the tyre trade is up to ±3% of the original overall diameter, and the smaller the difference, the better.
The speedometer counts wheel revolutions. A tyre with a larger diameter covers more ground per turn, so your real speed is higher than shown; a smaller one does the opposite. The calculator shows the real speed at 50, 90 and 130 km/h.
Yes, with a lower-profile tyre. For example, 205/55 R16, 215/45 R17 and 225/40 R18 are almost the same height. The "Bigger rims, same diameter" table shows the closest sizes we have in stock.
Only if they suit the rim width and do not touch the body or suspension, including at full steering lock and with a full load. A tyre that rubs will fail the roadworthiness test.
They must not be lower than those the carmaker specifies. A higher index is allowed. What the indices mean is explained on our tyre markings page.