# Tire Load & Speed Index — PSI, Weight & Rating Lookup

> PSI, Weight & Rating Lookup (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/tire-load-and-speed-index/id6761711664 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities
- Price: $1.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: English
- Released: 2026-04-08
- Data updated: 2026-07-08
- User reviews in markdown: https://appshunter.io/ios/app/tire-load-and-speed-index/id6761711664/reviews.md

## What is Tire Load & Speed Index?

Reading a tire sidewall and need to know what that load index number or speed letter actually means? This app decodes it instantly.

Select any load index from 60 to 130 to see maximum weight per tire in both lbs and kg. Pick any speed rating from L to ZR to see the maximum speed in mph and km/h.

WHAT YOU GET:
- Load index to max weight conversion (lbs and kg)
- Speed rating to max speed conversion (mph and km/h)
- Quick reference table for common load indices (70-120)
- Stepper control for fast index browsing

LOAD INDEX RANGE:
Covers indices 60 through 130 per ISO 4000-1 standard. Every value mapped to exact weight.

SPEED RATINGS:
L, M, N, P, Q, R, S, T, U, H, V, W, Y, and ZR — all with max speed values.

Works completely offline. No account required. Built for mechanics, tire shop technicians, fleet managers, and vehicle owners who need fast tire spec lookups.


## Version history (last 3 releases)

### 1.0.3 — 2026-06-28

Added a More Pro Tools section to discover related field calculators.

### 1.0.2 — 2026-04-13

Bug fixes and performance improvements.

### 1.0.1 — 2026-04-09

No release notes.

## More apps by Shanghai Sheyuan Network Technology Co., Ltd.

- [木不 - 解忧伴侣](https://appshunter.io/ios/app/id1597427913)
- [上岸香 - 考研考公专注助手](https://appshunter.io/ios/app/id6758300319)
- [Stamping Tonnage Calculator](https://appshunter.io/ios/app/stamping-tonnage-calculator/id6760528007)
- [CNC Thread Drill Hole Calc](https://appshunter.io/ios/app/cnc-thread-drill-hole-calc/id6760606318)
- [Orifice Jet Flow](https://appshunter.io/ios/app/orifice-jet-flow/id6760607248)
- [Concrete Block Wall Est](https://appshunter.io/ios/app/concrete-block-wall-est/id6760607814)

All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

---

*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 2026-07-08.*