Report updated May 20, 2026
Tire Size Fitment
For automotive enthusiasts and vehicle owners performing custom tire or wheel modifications.
Tire Size Fitment is an established utilities app that is completely free. With a 3.5/5 rating from 165 reviews, it shows polarized user reception.
What is Tire Size Fitment?
Tire Size Fitment is a utility app for automotive enthusiasts that calculates tire dimensions and speedometer variance on iOS and Android.
Users hire this tool to visualize the physical and mechanical impact of tire modifications before purchasing, reducing the risk of fitment errors.
Current Momentum
v3.10 · 1w ago
Maintenance- Last major update May 2026.
- Android build stagnant since 2025.
What makes this app unique?
What Does It Look Like?
How Is The App's Momentum Right Now?
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What Are The Key Features?
Visual side-by-side comparison of tire width, radius, diameter, and circumference changes
Calculates vehicle speed variance resulting from modified tire and wheel dimensions
Integrated reference library of major tire brands and specific models
How much does it cost?
- Free with ad support
Monetization relies entirely on ad-inventory generated by utility-based engagement.
Who Built It?
Enrichment in progress
Publisher profile available very soon
What other apps does Nikita Morozov make?
What do users think recently?
Analysis in progress, available soon
What is the competitive landscape for Tire Size Fitment?
How's The Utilities Market?
How does it evolve in the Utilities market?
The app maintains a 4.21 rating on iOS against a 2.4 rating on Android, signaling a platform-specific quality disparity that undermines its utility in the broader automotive tool market.
| Country | Category | Chart | Rank | Change |
|---|---|---|---|---|
| 🇹🇭 Thailand | Auto & Vehicles | AndroidFree | #136 | NEW |
| 🇹🇼 Taiwan | Auto & Vehicles | AndroidFree | #192 |
The rivals identified
The Nemesis
Head to Head
The target should focus on expanding its database to include more niche industrial/agricultural specs to neutralize the nemesis's technical authority.
What sets Tire Size Fitment apart
Offers a broader, more accessible database of general tire brands and models for everyday vehicle owners.
Provides a more intuitive interface for comparing two different tire sizes side-by-side for quick visualization.
What's Firestone AG Tyres's Edge
Deep integration with specific agricultural tire technical data that general calculators simply cannot provide.
Backed by a major industry manufacturer, providing a level of technical accuracy that builds professional credibility.
Contenders
Offers a comprehensive technical data library that serves as a reference point for professional tire technicians.
Includes a specialized lead calculator feature that is essential for agricultural equipment setup and maintenance.
Provides distinct calculation modes for basic versus advanced users to improve accessibility for non-technical drivers.
Includes terrain-specific optimization features that allow users to adjust pressure based on real-world driving conditions.
Peers
Features mandatory ELD compliance logging, which forces daily usage and creates a high barrier to switching.
Includes air scale integration that provides real-time weight data, adding significant value for commercial truck drivers.
Provides direct access to OEM repair data, making it an indispensable tool for professional automotive shops.
Integrates OBDII diagnostic data, allowing for a holistic view of vehicle health that exceeds simple tire math.
Deep integration with JDLink Connect allows users to manage equipment serial numbers and maintenance logs directly.
Includes a native parts finder feature that streamlines the procurement process for replacement tires and components.
Provides real-time map tracking and driver messaging, creating a sticky ecosystem beyond simple tire calculations.
Offers enterprise-grade landmark proximity alerts that integrate tire maintenance schedules into broader fleet operations.
New Kids on the Block
Features a highly specialized cut list optimizer that solves complex geometry problems for woodworkers and builders.
Applies the same 'calculator-first' UX pattern to livestock feed composition instead of automotive tire dimensions.
The outtake for Tire Size Fitment
Strengths to defend, gaps to attack
Core Strengths
- Visual side-by-side comparison interface
Critical Frictions
- 1.81★ Android-iOS rating gap
Growth Levers
- Industrial/agricultural database expansion
Market Threats
- Professional-grade OEM data integration
What are the next best moves?
Audit Android build stability because of the 1.81★ rating gap → increase Android retention
The rating gap between platforms indicates a specific failure in the Android user experience.
Trade-off: Pause the tire database expansion — stability is the prerequisite for user acquisition.
A counter-intuitive read
The app's hobbyist focus is not a weakness but a moat, as professional-grade tools are too complex for the mass-market casual modifiers who drive the bulk of ad-inventory revenue.
Feature Gaps vs Competitors
- OEM repair data integration (available in ALLDATA)
- ELD compliance logging (available in Blue Ink Tech)
Key Takeaways
Tire Size Fitment provides a functional visualization tool for casual modifiers, but the significant Android rating gap and lack of professional-grade technical data limit its growth, so the PM should prioritize a stability audit on Android to stabilize the user base.
Where Is It Heading?
Mixed Signals
The automotive utility market is consolidating around professional-grade repair tools that offer integrated diagnostic data, leaving general-purpose calculators exposed. Tire Size Fitment must address its Android performance issues to maintain its current user base, as the lack of technical depth prevents it from competing for the high-value professional segment.
The Android rating gap (1.81★) indicates technical debt that erodes trust, which will likely accelerate churn among non-iOS users.
Recent updates focus on maintenance rather than feature expansion, suggesting the app is in a defensive posture against professional-grade competitors.