# Tire Size Calculator + — Compare & Speedo Error

> Compare & Speedo Error (iPhone/iPad app by heekyung moon.)

- Source: https://appshunter.io/ios/app/tire-size-calculator-plus/id6790019544 (this page in markdown: same URL + `.md`)
- Developer: [heekyung moon](https://appshunter.io/developer/6779193748)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 17+
- Requires: iOS 16.4 · 52 MB
- Languages: American English
- Released: 2026-07-21
- Data updated: 2026-08-06
- User reviews in markdown: https://appshunter.io/ios/app/tire-size-calculator-plus/id6790019544/reviews.md

## What is Tire Size Calculator +?

▶ Compare two tire sizes at a glance. Enter both specs and see the difference in diameter, circumference, sidewall and ride height, with a to-scale overlay so the size change is obvious.

▶ Check your speedometer. See how a new tire shifts your real speed versus the reading, plus an odometer-error percentage — the numbers that matter after an upsize.

▶ Find plus sizes. Enter a target and get alternate sizes within a few percent of the original diameter, grouped by rim so you can plan a clean plus-one or plus-two.

▶ Decode the markings. Load-index and speed-rating tables turn the numbers on the sidewall into kg and km/h, with P, LT and XL explained.

▶ Save your vehicles and share a result card. Works offline, no account needed.

Results are for reference only. Fitment and clearance depend on your vehicle — always confirm with your owner's manual or a tire professional.


## Version history (last 3 releases)

### 1.1.1 — 2026-08-01

Performance improvements, bug fixes, and refinements for the latest iOS.

### 1.1 — 2026-07-29

Performance improvements, bug fixes, and refinements for the latest iOS.

### 1.0 — 2026-07-21

No release notes.

## More apps by heekyung moon

- [Blur & Mosaic Privacy](https://appshunter.io/ios/app/blur-and-mosaic-privacy/id6779193648)
- [Aurora Northern Lights](https://appshunter.io/ios/app/aurora-northern-lights/id6779193746)
- [Golden Hour Sun Tracker](https://appshunter.io/ios/app/golden-hour-sun-tracker/id6779194270)
- [GIF Maker & Editor Studio](https://appshunter.io/ios/app/gif-maker-and-editor-studio/id6779194430)
- [Slow Shutter Long Exposure](https://appshunter.io/ios/app/slow-shutter-long-exposure/id6780141566)
- [Rain Alert Nowcast](https://appshunter.io/ios/app/rain-alert-nowcast/id6780142286)

All apps by heekyung moon: https://appshunter.io/developer/6779193748

## Related topics

[tire size calculator plus](https://appshunter.io/ios/topics/tire-size-calculator-plus)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*