Gear Ratio Calculator

Squarespace-ready HTML calculator for matching tire size, highway speed, transmission top gear, and target RPM to a practical axle ratio.

Tire Diameter (in)

Highway Speed (MPH)

Transmission Final Gear

Target Cruise RPM

Axle Family

Use Case

Results

Ideal Ratio

0.00

Nearest Available

0.00

Engine RPM @ Speed

Get Started

FFC Speeds & Feeds Calculator

Flat Fender Customs

Speeds & Feeds Calculator

Squarespace-ready standalone HTML tool for manual milling estimates. Use Normal mode for quick shop answers, or switch to Advanced for more material and tooling choices.

Material

Endmill Diameter (in)

Flute Count

Cut Type

Results

RPM

Feed Rate (IPM)

Chip Load / Tooth

0.0000

Use these as starting values, then tune for machine rigidity, workholding, tool stick-out, coolant, and finish requirements.

Radiator & Coolant Calculator

Universal cooling system sizing for custom builds

Engine & Application

Horsepower *

Cylinder Count

Factory Coolant Capacity (qts)

Use Type

Radiator Package

Location

Flow Style

Core Width (in)

Core Height (in)

Core Thickness (in)

Fan Type

Tank Dimensions (Optional)

Tank Width (in)

Tank Height (in)

Tank Depth (in)

Transmission Cooler

Trans Type

GVW (lbs) if towing