Cyclocross Bikes

Cyclocross Bike Buying Guide

CX vs Gravel

Cyclocross bikes and gravel bikes look similar but serve different purposes. CX bikes have steeper head angles (72-73°) for quick, aggressive handling at race pace. Tyre clearance is limited to 33mm (UCI maximum). Bottom brackets sit higher for pedalling through ruts and over barriers. There are minimal mount points — no racks, few bottle cages, because races last 60 minutes. Gravel bikes are more relaxed, clear wider tyres, and are loaded with mount points for adventures. If you race CX, you need a CX bike. If you want versatility, get a gravel bike.

Frame and Construction

CX frames take massive abuse — crashes, shouldering, pressure washing, riding in mud and sand. Carbon CX frames are lightweight for racing but need careful inspection for crash damage. Aluminium CX frames (Giant TCX SLR, Specialized Crux alloy) are tougher and cheaper to replace. Steel CX frames are rare at race level but make excellent training bikes. Key frame details: the top tube should have a flat section for shouldering, cable routing should resist mud ingress, and the rear triangle needs clearance for mud build-up.

Brakes and Gearing

Disc brakes are universal on modern CX bikes — cantilever brakes have essentially disappeared from new models. Mechanical discs are fine for training; hydraulic (Shimano GRX, SRAM Rival/Force) offer better modulation in muddy, wet conditions. Gearing: 1x is the CX standard — a 40T chainring with an 11-34 or 11-36 cassette covers everything. No front derailleur means no chain drops in rough terrain. Shimano GRX or SRAM Force/Rival 1x are the go-to groupsets. Chain retention is critical — a clutch rear derailleur and narrow-wide chainring prevent dropped chains.

Wheels and Tyres

CX race wheels need to be light and laterally stiff. Carbon tubular wheels are the race standard — tubulars can be run at very low pressures (20-25psi) without risking rim damage. Tubeless clinchers are increasingly competitive and far more practical for training. Aluminium wheels are sensible for training and local racing. Tyres: 33mm is maximum for UCI racing. Mud tyres (Challenge Limus, Dugast Rhino), all-round tyres (Challenge Chicane, Schwalbe X-One), and fast/dry tyres (Challenge Grifo) cover the three main conditions. Most UK CX racing suits mud tyres from October to January.

Buying Used CX Bikes

CX bikes live hard lives — crashes, pressure washing, and mud take their toll. Inspect frames carefully for crash damage, especially around the head tube, down tube, and dropout areas. Check bottom bracket shells for creaking or play — CX bikes get submerged in puddles regularly. Examine disc brake rotor surfaces for deep scoring. Drivetrains wear fast in gritty conditions — budget for a new chain and cassette on any used CX bike. The best used CX deals come in spring when racers upgrade for next season.