CYCLING
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Focused Drivetrain Tool

Fixed Gear Skid Patch Calculator

Determines the number of discrete tire contact patch locations created during skid stops for fixed-gear drivetrains.

Formula & Mechanics
Skid Patches = Rear Cog Teeth / GCD(Chainring, Cog)

Powered by our unified DrivetrainCalculationEngine. All metrics remain in sync.

Track and fixed gear bicycle setup detail
Tire Wear Analysis for Fixed Gear & Track Bicycles

1. Drivetrain Setup

Chainrings & Cassette

2. Wheel & Tire Model

Dimensions & Rollout

Calculated wheel dimensions are theoretical estimates. Actual rollout varies with tire pressure, rim inner width, and rider weight. Use measured rollout for highest accuracy.

Track / Fixed GearFixed Gearing

Skid Patch Analysis

For fixed-gear bikes, calculate rear tire wear locations during skid stopping for 50T × 11T.

Single-Foot Skid11 Patches
Ambidextrous Skid11 Patches
More skid patches distribute tire casing wear evenly.
Chain SizingGeometry

Chain Length Calculator

Exact Calculated Links:80.82
Recommended Even Links:82 Links
Round up to nearest even link count when sizing new chains.
Shareable SetupURL Sync

Share Drivetrain Setup

Export your current drivetrain configuration, wheel dimensions, and cadence setup directly into a shareable URL.