MOUNTRIDES
Ride the trail dialled in — free mountain-biking calculators for tire pressure, gearing, suspension sag, spoke length, chain length, and wheel size, plus plain-English guides to MTB gear, bike setup, and off-road riding skills.
From dialling in tire pressure and sag to comparing gearing, sizing a chain, and building a wheel, MountRides pairs free hands-on mountain-biking calculators with plain-English guides to gear, setup, and trail skills — plus an illustrated museum of the bike and the sport. Set the bike up right, then go ride.
Mountain-Biking Calculators
Free tools for setting up and maintaining a mountain bike — tire pressure, gear ratio, suspension sag, spoke length, chain length, and wheel-size comparison.
MTB Tire Pressure Calculator
Turn your weight, bike weight, tire width, and terrain into a recommended front and rear pressure — the cheapest upgrade to grip and flat protection you own
Gear Ratio Calculator
Convert a chainring, cog, and wheel size into gear ratio, gear inches, development, and speed at your cadence — and compare gearing fairly across wheel sizes
Suspension Sag Calculator
Get the exact millimetres of sag to set on your fork and shock from your travel and target percentage, plus a starting air pressure to dial in from
Spoke Length Calculator
Calculate drive- and non-drive-side spoke lengths from rim ERD, hub flange geometry, spoke count, and cross pattern — the number a whole wheel build depends on
Chain Length Calculator
Work out how many links your chain needs from chainstay length and your biggest ring and cog — the shop formula, before you break one link too many
Wheel Size Converter
Compare 26", 27.5", and 29" wheels on real diameter and rollout at your tire width, and see how a wheel-size change shifts your effective gearing
Bike & Trail Museum
Step into an illustrated museum of mountain biking — the sport and its disciplines, the long evolution of the bicycle from the penny-farthing to the modern trail bike, the anatomy of the machine you ride, and the riders and races that shaped off-road cycling, each in its own gallery. Get to know the history behind the bike under you.
Tour the museum →From the Trail Journal
Fresh guides on MTB gear and kit, bike setup and tuning, trail skills across cross-country, downhill, and enduro, and hands-on maintenance and repair — everything to help you ride better and wrench smarter.
The Thrill of Freeride Mountain Biking: Conquering Nature’s Untamed Trails
The Wild Ride: Mastering Off-Road Cycling Adventures
Beyond the Gravel: Conquering Peaks on Two Wheels With Bikepacking
The Adrenaline-Packed World of Enduro Biking: Conquering Trails Like Never Before
Pedal Perfect: A Deep Dive Into Essential Bike Gear Reviews for Mountain Riders
The Thrill of Gravel and Gravity: Unveiling the World of Mountain Bike Racing
Keep Learning
Plain-language explainers on MTB gear and kit, bike setup and tuning, trail skills, and maintenance and repair — everything you need to understand the bike beneath you and ride it with confidence.
Visit the Learn hub →