# Car Tire Size Calc — Rim Offset & Speedo Compare

> Rim Offset & Speedo Compare (iPhone/iPad app by Yaroslav Martsynyuk.)

- Source: https://appshunter.io/ios/app/car-tire-size-calc/id6758035330 (this page in markdown: same URL + `.md`)
- Developer: [Yaroslav Martsynyuk](https://appshunter.io/developer/1870475804)
- Category: Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 26.0 · 7 MB
- Languages: American English
- Released: 2026-01-21
- Data updated: 2026-08-01
- User reviews in markdown: https://appshunter.io/ios/app/car-tire-size-calc/id6758035330/reviews.md

## What is Car Tire Size Calc?

Compare your current tires and rims to a new setup before you buy. Upgrade with confidence and see exactly how changes affect your vehicle's performance. Tire Size Calculator shows speedometer error, clearance change, sidewall height, circumference, rim offset (ET), and wheel stance shift — with metric or imperial units.

Share or print PDF report with mechanic or friend.

- Speedometer Accuracy: Instantly check speedometer differences to avoid miscalculations.
- Ground Clearance Impact: See how new tire sizes influence your car’s ride height.
- Multiple Unit Support: Choose between Metric and Imperial measurements for convenience.
- User-Friendly Interface: Designed for quick and easy comparisons—no complex formulas required!

Make informed decisions and optimise your vehicle’s performance with precision. Perfect for upsizing wheels, checking plus-sizing, or verifying fitment before installation.


## Version history (last 5 releases)

### 1.0.7 — 2026-06-18

Store listing update

### 1.0.6 — 2026-06-06

New background and screenshots

### 1.0.5 — 2026-05-29

Updated icon

### 1.0.3 — 2026-01-22

Fixed PFD layout

### 1.0.2 — 2026-01-22

Tire size conclusion is specific to units.
Recommended tire width.

## 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 2026-08-01.*