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Automotive RepairPart Identification & Selection3MediumDIY Mechanic / Hobbyist$ implied

Custom supercharger belt sizing is a guessing game causing belt slip and tensioner issues.

No database or tool exists for non-standard supercharger belt lengths based on pulley sizes and custom setups, so mechanics resort to trial and error.

Severity

3Medium

Willingness to Pay

implied

Added

Jun 4, 2026

Workarounds Described

trials different belt sizes (111", 113") and guesses the next size (115")

Implied Software Gaps

Belt sizing calculator that accounts for custom pulley configurations and tensioner behavior

App Concept

BeltFit Pro

BeltFit Pro is a mobile app that calculates the correct belt length for custom supercharger and pulley setups. Users input pulley diameters, center distances, and belt wrap angles to get an exact recommendation, eliminating guesswork and belt slip.

Key Features

Enter pulley diameters and center distance
Automatically recommends belt length from a comprehensive catalog
Includes tensioner adjustment simulation
Saves custom build profiles for future reference

Target Users: DIY mechanics and performance shops working on custom supercharger installations in the automotive aftermarket industry.

Revenue Model: $9.99 one-time purchase per build profile, or $4.99/month subscription with unlimited saves and a belt length database.

Existing Solutions Mentioned

111" belt113" belt

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