Part of the data ring
TireFit
Rim schedule178 sizes · 101 conventional

Tyre sizes for a
14-inch rim

178 sizes A 14-inch wheel takes 178 metric tyre sizes inside the physical envelope of a road tyre, from 175/50R14 at 531 mm to 285/75R14 at 783 mm.

101 of them sit inside the conventional fitment envelope and are listed first. The rest are arithmetically valid combinations that the market does not build, and they are marked as such rather than hidden.

Every size, shortest to tallest

Overall diameter under each. Sizes outside the conventional envelope are greyed.

175/50R14531 mm 135/65R14531 mm 195/45R14531 mm 295/30R14533 mm · uncommon 355/25R14533 mm · uncommon 255/35R14534 mm · uncommon 225/40R14536 mm · uncommon 165/55R14537 mm 305/30R14539 mm · uncommon 205/45R14540 mm 185/50R14541 mm 265/35R14541 mm · uncommon 155/60R14542 mm 235/40R14544 mm · uncommon 145/65R14544 mm 135/70R14545 mm 315/30R14545 mm · uncommon 175/55R14548 mm 275/35R14548 mm · uncommon 215/45R14549 mm 195/50R14551 mm 325/30R14551 mm · uncommon 245/40R14552 mm · uncommon 165/60R14554 mm 285/35R14555 mm · uncommon 335/30R14557 mm · uncommon 155/65R14557 mm 135/75R14558 mm 225/45R14558 mm 145/70R14559 mm 185/55R14559 mm 255/40R14560 mm · uncommon 205/50R14561 mm 295/35R14562 mm · uncommon 345/30R14563 mm · uncommon 175/60R14566 mm 235/45R14567 mm 265/40R14568 mm · uncommon 355/30R14569 mm · uncommon 305/35R14569 mm · uncommon 165/65R14570 mm 195/55R14570 mm 215/50R14571 mm 135/80R14572 mm 155/70R14573 mm 145/75R14573 mm 275/40R14576 mm · uncommon 245/45R14576 mm 315/35R14576 mm · uncommon 185/60R14578 mm 225/50R14581 mm 205/55R14581 mm 175/65R14583 mm 325/35R14583 mm · uncommon 285/40R14584 mm · uncommon 255/45R14585 mm 165/70R14587 mm 145/80R14588 mm 155/75R14588 mm 195/60R14590 mm 335/35R14590 mm · uncommon 235/50R14591 mm 295/40R14592 mm · uncommon 215/55R14592 mm 265/45R14594 mm 185/65R14596 mm 345/35R14597 mm · uncommon 305/40R14600 mm · uncommon 175/70R14601 mm 245/50R14601 mm 205/60R14602 mm 165/75R14603 mm 225/55R14603 mm 275/45R14603 mm 155/80R14604 mm 355/35R14604 mm · uncommon 315/40R14608 mm · uncommon 195/65R14609 mm 255/50R14611 mm 285/45R14612 mm · uncommon 215/60R14614 mm 235/55R14614 mm 185/70R14615 mm 325/40R14616 mm · uncommon 175/75R14618 mm 165/80R14620 mm 265/50R14621 mm 295/45R14621 mm · uncommon 205/65R14622 mm 335/40R14624 mm · uncommon 245/55R14625 mm 225/60R14626 mm 195/70R14629 mm 305/45R14630 mm · uncommon 275/50R14631 mm 345/40R14632 mm · uncommon 185/75R14633 mm 215/65R14635 mm 175/80R14636 mm 255/55R14636 mm 235/60R14638 mm 315/45R14639 mm · uncommon 355/40R14640 mm · uncommon 285/50R14641 mm · uncommon 205/70R14643 mm 265/55R14647 mm 195/75R14648 mm 225/65R14648 mm 325/45R14648 mm · uncommon 245/60R14650 mm 295/50R14651 mm · uncommon 185/80R14652 mm 215/70R14657 mm 335/45R14657 mm · uncommon 275/55R14658 mm 305/50R14661 mm · uncommon 235/65R14661 mm 255/60R14662 mm 205/75R14663 mm 345/45R14666 mm · uncommon 195/80R14668 mm 285/55R14669 mm · uncommon 225/70R14671 mm 315/50R14671 mm · uncommon 265/60R14674 mm 245/65R14674 mm 355/45R14675 mm · uncommon 215/75R14678 mm 295/55R14680 mm · uncommon 325/50R14681 mm · uncommon 205/80R14684 mm 235/70R14685 mm 275/60R14686 mm 255/65R14687 mm 335/50R14691 mm · uncommon 305/55R14691 mm · uncommon 225/75R14693 mm 285/60R14698 mm · uncommon 245/70R14699 mm 215/80R14700 mm 265/65R14700 mm 345/50R14701 mm · uncommon 315/55R14702 mm · uncommon 235/75R14708 mm 295/60R14710 mm · uncommon 355/50R14711 mm · uncommon 255/70R14713 mm 275/65R14713 mm · uncommon 325/55R14713 mm · uncommon 225/80R14716 mm 305/60R14722 mm · uncommon 245/75R14723 mm 335/55R14724 mm · uncommon 285/65R14726 mm · uncommon 265/70R14727 mm 235/80R14732 mm 315/60R14734 mm · uncommon 345/55R14735 mm · uncommon 255/75R14738 mm 295/65R14739 mm · uncommon 275/70R14741 mm · uncommon 325/60R14746 mm · uncommon 355/55R14746 mm · uncommon 245/80R14748 mm 305/65R14752 mm · uncommon 265/75R14753 mm 285/70R14755 mm · uncommon 335/60R14758 mm · uncommon 255/80R14764 mm 315/65R14765 mm · uncommon 275/75R14768 mm · uncommon 295/70R14769 mm · uncommon 345/60R14770 mm · uncommon 325/65R14778 mm · uncommon 265/80R14780 mm 355/60R14782 mm · uncommon 305/70R14783 mm · uncommon 285/75R14783 mm · uncommon

SOURCE·Metric size geometry + UN ECE R39 speedometer tolerance·178 designations, each computed from the size itself·REVIEWED ETRTO STANDARD

How the figures are derived

  1. Read the size as the specification it is: section width in millimetres, aspect ratio as a percentage of that width, rim diameter in inches.
  2. Sidewall height = width × aspect ÷ 100. This is the number the size string is really about, and it is the one nobody quotes.
  3. Overall diameter = rim × 25.4 + two sidewalls — one at the top of the wheel and one at the bottom.
  4. Circumference = π × overall diameter, which gives revolutions per kilometre and per mile directly.
  5. Nothing above is measured, estimated, averaged or dated. It is the definition of the designation, so it does not go stale and it has no source to cite beyond the standard itself.
sidewall (mm) = width × aspect ÷ 100
overall diameter (mm) = rim × 25.4 + 2 × sidewall
speedo true speed = indicated × (new diameter ÷ old diameter)

The full method, the ±3% rule, and what geometry cannot tell you →

About 14-inch fitments

How many tyre sizes are there for a 14-inch rim?

178 metric sizes fall inside the physical envelope of a road tyre on a 14-inch wheel, of which 101 sit inside the conventional fitment envelope. They range from 175/50R14 at 531 mm overall to 285/75R14 at 783 mm.

Does a bigger rim mean a bigger tyre?

Not usually. Going up a rim size while keeping the same overall diameter is the entire point of plus-sizing: the wheel grows, the sidewall shrinks by the same amount, and the rolling diameter — which is what the speedometer counts — stays put.

13″ 15315″ 20216″ 22417″ 22818″ 21819″ 20620″ 19321″ 18022″ 163
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Published by

Amit Sharma

Auckland real-estate agent and marketer. Builds free, sourced data tools.

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